path: root/profiles/use.local.desc

# This file is deprecated as per GLEP 56 in favor of metadata.xml.
# Please add your descriptions to your package's metadata.xml ONLY.
# * generated automatically using pmaint *

app-accessibility/brltty:api - build brltty's application program interface
app-accessibility/brltty:beeper - support the console tone generator
app-accessibility/brltty:contracted-braille - support in-line contracted braille
app-accessibility/brltty:fm - support for the sound card synthesizer
app-accessibility/brltty:midi - support the musical instrument digital interface
app-accessibility/brltty:pcm - support for sound card digital audio
app-accessibility/brltty:speech - speech support
app-accessibility/eflite:16k_voice - Use a higher-quality voice.
app-accessibility/emacspeak:espeak - Adds support for the espeak tts engine
app-accessibility/freetts:jsapi - build Java Speech API (JSAPI)
app-accessibility/freetts:mbrola - Adds support for mbrola voices
app-accessibility/orca:braille - Enable braille support
app-accessibility/speech-dispatcher:espeak - Adds support for espeak speech engine
app-accessibility/speech-dispatcher:flite - Adds support for flite speech engine
app-accessibility/speechd-el:brltty - brltty support
app-admin/clsync:cgroups - Use cgroups to limit /dev access.
app-admin/clsync:cluster - Enable clustering support (allows master-master clsync on multiple hosts). Not fully implemented yet.
app-admin/clsync:control-socket - Enable AF_UNIX control socket support.
app-admin/clsync:extra-debug - Enable extra debugging. This will hurt performance badly. Be ready for tons of output.
app-admin/clsync:extra-hardened - Enable extra security checks. This will hurt performance.
app-admin/clsync:gio - Enable GIO for FS monitoring (glib based alternative to inotify interface, not recommended; if both are compiled, may be selected at runtime).
app-admin/clsync:highload-locks - Allows to use spinlocks for short delays instead of mutexes, but only on SMP systems.
app-admin/clsync:namespaces - Enable namespaces isolation.
app-admin/conky:apcupsd - Enable support for sys-power/apcupsd
app-admin/conky:audacious - Enable monitoring of music played by media-sound/audacious
app-admin/conky:cmus - Enable monitoring of music played by media-sound/cmus
app-admin/conky:eve - Enable support for the eve-online skill monitor
app-admin/conky:ical - Enable support for events from iCalendar (RFC 5545) files using dev-libs/libical
app-admin/conky:iostats - Enable support for per-task I/O statistics
app-admin/conky:irc - Enable support for displaying everything from an irc channel using net-libs/libircclient
app-admin/conky:lua-cairo - Enable if you want Lua Cairo bindings
app-admin/conky:lua-imlib - Enable if you want Lua Imlib2 bindings
app-admin/conky:lua-rsvg - Enable if you want Lua RSVG bindings
app-admin/conky:math - Enable support for glibc's libm math library
app-admin/conky:moc - Enable monitoring of music played by media-sound/moc
app-admin/conky:mpd - Enable monitoring of music controlled by media-sound/mpd
app-admin/conky:nano-syntax - Enable syntax highlighting for app-editors/nano
app-admin/conky:nvidia - Enable reading of nvidia card temperature sensors via x11-drivers/nvidia-drivers
app-admin/conky:portmon - Enable support for tcp (ip4) port monitoring
app-admin/conky:thinkpad - Enable support for IBM/Lenovo notebooks
app-admin/conky:weather-metar - Enable support for metar weather service
app-admin/conky:weather-xoap - Enable support for metar and xoap weather service
app-admin/conky:webserver - Enable support to act as a webserver serving conkys output using net-libs/libmicrohttpd
app-admin/conky:xmms2 - Enable monitoring of music played by media-sound/xmms2
app-admin/diamond:mongo - Enable MongoDB support
app-admin/diamond:redis - Enable Redis support
app-admin/diradm:automount - Support for automount data in LDAP
app-admin/diradm:irixpasswd - Support for storing separate IRIX passwords
app-admin/gkrellm:X - Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only
app-admin/gkrellm:gnutls - Enable SSL support for mail checking with net-libs/gnutls (overrides 'ssl' USE flag)
app-admin/gkrellm:hddtemp - Enable monitoring harddrive temperatures via app-admin/hddtemp
app-admin/gkrellm:lm_sensors - Enable monitoring sensors via sys-apps/lm_sensors
app-admin/gkrellm:ntlm - Enable NTLM authentication for mail checking with net-libs/libntlm
app-admin/gkrellm:ssl - Enable SSL support for mail checking with dev-libs/openssl
app-admin/glance:swift - Adds swift storage support
app-admin/gtkdiskfree:gtk2 - Support GTK+ 2.x instead of GTK+ 3.x
app-admin/hddtemp:network-cron - Monthly cronjob to update hddtemp.db.
app-admin/keepass:aot - Generate native code at build time, rather than runtime.
app-admin/keepassxc:autotype - Add support to autotype the passwords into other applications
app-admin/keepassxc:browser - Enables browser plugin support
app-admin/keepassxc:network - Enable network support
app-admin/keepassxc:yubikey - Enable database unlocking via YubiKey.
app-admin/lastpass-cli:X - Use x11-misc/xclip or x11-misc/xsel to copy passwords to the clipboard.
app-admin/lastpass-cli:pinentry - Use app-crypt/pinentry to prompt for passwords.
app-admin/logrotate:acl - Installs acl support
app-admin/logrotate:cron - Installs cron file
app-admin/logrotate:selinux - Installs Security Enhanced Linux support
app-admin/mcollective:client - Install client utilities
app-admin/mms-agent:monitoring - Install the monitoring agent
app-admin/openrc-settingsd:systemd - Use the versions of dbus and polkit files provided by sys-apps/systemd
app-admin/packagekit-base:command-not-found - Enable packagekit support on shell "command not found"
app-admin/packagekit-base:cron - Install cron script for auto-update
app-admin/packagekit-base:elogind - Enable elogind support to get user session
app-admin/packagekit-base:entropy - Enable Entropy backend
app-admin/pass:X - Use x11-misc/xclip to copy passwords to the clipboard.
app-admin/pass:dmenu - Add support for x11-misc/dmenu with the 'passmenu' program.
app-admin/pass:fish-completion - Enable fish completion support.
app-admin/pass:git - Use dev-vcs/git for password revisions.
app-admin/pass:importers - Allow importing passwords from other password managers using various contributed scripts.
app-admin/puppet:augeas - Enable augeas support
app-admin/puppet:diff - Enable diff support
app-admin/puppet:experimental - Add patches for things in testing
app-admin/puppet:rrdtool - Enable rrdtool support
app-admin/puppet:shadow - Enable shadow support
app-admin/puppet-agent:puppetdb - Adds puppetdb support
app-admin/puppetserver:puppetdb - Adds support for connecting to puppetdb
app-admin/pwgen:livecd - Install init script for root password scrambling on boot
app-admin/rsyslog:curl - Enable http_request() function in RainerScript (requires net-misc/curl)
app-admin/rsyslog:dbi - Build the general database output module (requires dev-db/libdbi)
app-admin/rsyslog:elasticsearch - Build the Elasticsearch output module (requires net-misc/curl)
app-admin/rsyslog:gcrypt - Add support for encrypted log files using dev-libs/libgcrypt
app-admin/rsyslog:gnutls - Build the GnuTLS network stream driver (requires net-libs/gnutls)
app-admin/rsyslog:grok - Build the grok modify module (requires dev-libs/grok)
app-admin/rsyslog:kafka - Build the Apache Kafka input/output module (requires dev-libs/librdkafka)
app-admin/rsyslog:kerberos - Build the GSSAPI input and output module (requires virtual/krb5)
app-admin/rsyslog:kubernetes - Build the kubernetes modify plugin (requires net-misc/curl)
app-admin/rsyslog:libressl - Use dev-libs/libressl instead of dev-libs/openssl (you still need to enable functionality which requires OpenSSL)
app-admin/rsyslog:mdblookup - Build the MaxMind DB lookup message modify plugin using dev-libs/libmaxminddb
app-admin/rsyslog:mongodb - Build the MongoDB output module (requires dev-libs/libmongo-client)
app-admin/rsyslog:mysql - Build the MySQL database output module (requires virtual/mysql)
app-admin/rsyslog:normalize - Build the normalize modify module (requires dev-libs/libee and dev-libs/liblognorm)
app-admin/rsyslog:omhttp - Build the http output module (requires net-misc/curl)
app-admin/rsyslog:omhttpfs - Build the httpfs output module (requires net-misc/curl)
app-admin/rsyslog:omudpspoof - Build the udpspoof output module (requires net-libs/libnet)
app-admin/rsyslog:openssl - Build the OpenSSL network stream driver (requires dev-libs/openssl)
app-admin/rsyslog:postgres - Build the PostgreSQL database output module (requires dev-db/postgresql)
app-admin/rsyslog:rabbitmq - Build the RabbitMQ output module (requires net-libs/rabbitmq-c)
app-admin/rsyslog:redis - Build the Redis output module using (requires dev-libs/hiredis)
app-admin/rsyslog:relp - Build the Reliable Event Logging Protocol (RELP) output module (requires dev-libs/librelp)
app-admin/rsyslog:rfc3195 - Build the rfc3195 input module (requires dev-libs/liblogging)
app-admin/rsyslog:rfc5424hmac - Build the rfc5424hmac modify module (requires dev-libs/openssl or dev-libs/libressl)
app-admin/rsyslog:snmp - Build the snmp modify and output module (requires net-analyzer/net-snmp)
app-admin/rsyslog:ssl - Add support for encrypted client/server communication (requires net-libs/gnutls)
app-admin/rsyslog:systemd - Build the journal input and output module (requires sys-apps/systemd)
app-admin/rsyslog:usertools - Installs the user tools (rsgtutil, rscryutil...) corresponding to the set USE flags
app-admin/rsyslog:uuid - Include UUIDs in messages (requires sys-apps/util-linux)
app-admin/rsyslog:xxhash - Enable xxHash support in fmhash module (requires dev-libs/xxhash)
app-admin/rsyslog:zeromq - Build the ZeroMQ input and output modules (requires net-libs/czmq)
app-admin/sagan:libdnet - Add support for dev-libs/libdnet
app-admin/sagan:lognorm - Add support for log/rules normalizations via dev-libs/liblognorm
app-admin/sagan:pcap - Add support for network packet capture via net-libs/libpcap
app-admin/sagan:smtp - Build witch SMTP (E-Mail) support
app-admin/sagan:snort - Add support to interact with Snort IDE using net-analyzer/snortsam'
app-admin/sagan-rules:lognorm - Install normalize rules support with dev-libs/liblognorm
app-admin/sudo:gcrypt - Use SHA2 from dev-libs/libgcrypt instead of sudo's internal SHA2
app-admin/sudo:offensive - Let sudo print insults when the user types the wrong password
app-admin/sudo:openssl - Use SHA2 from dev-libs/openssl instead of sudo's internal SHA2
app-admin/sudo:sendmail - Allow sudo to send emails with sendmail
app-admin/sudo:sssd - Add System Security Services Daemon support
app-admin/sysklogd:logrotate - use app-admin/logrotate for rotating logs rather than custom cron scripts
app-admin/syslog-ng:amqp - Enable support for AMQP destinations
app-admin/syslog-ng:geoip2 - Add support for geo lookup based on IPs via dev-libs/libmaxminddb
app-admin/syslog-ng:http - Enable support for HTTP destinations
app-admin/syslog-ng:json - Enable support for JSON template formatting via dev-libs/json-c
app-admin/syslog-ng:mongodb - Enable support for mongodb destinations
app-admin/syslog-ng:pacct - Enable support for reading Process Accounting files (EXPERIMENTAL, Linux only)
app-admin/syslog-ng:redis - Enable support for Redis destinations
app-admin/syslog-ng:smtp - Enable support for SMTP destinations
app-admin/syslog-ng:spoof-source - Enable support for spoofed source addresses
app-admin/sysstat:isag - Install isag, the Interactive System Activity Graph tool
app-admin/systemrescuecd-x86:isohybrid - Pass downloaded images through isohybrid in order to make it possible to copy them directly to USB media and boot (requires sys-boot/syslinux at build time).
app-admin/testdisk:ewf - Include ewf library
app-admin/testdisk:ntfs - Include the ability to read NTFS filesystems
app-admin/testdisk:reiserfs - Include reiserfs reading ability
app-admin/tripwire:ssl - Adds support for Secure Socket Layer connections
app-admin/tripwire:static - Builds the package statically
app-admin/tripwire:tools - Installs app-admin/mktwpol, providing scripts for the installation/setup of tripwire, including generating the tripwire policy file and maintenance of the tripwire database
app-admin/ulogd:json - Build JSON output plugin to save packets in JSON file format
app-admin/ulogd:nfacct - Build NFACCT input plugin to support traffic accounting via nfnetlink_acct
app-admin/ulogd:nfct - Build NFCT input plugin to support stateful flow-based logging via nfnetlink_conntrack
app-admin/ulogd:nflog - Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_log
app-admin/ulogd:pcap - Build PCAP output plugin to save packets in libpcap file format
app-admin/ulogd:ulog - Build ULOG input plugin to support deprecated packet-based logging via ULOG target
app-admin/webalizer:xtended - Include the 404 extension
app-admin/webapp-config:portage - Propagete python_targets dependencies to sys-apps/portage
app-admin/yaala:storable - Support for persistence of Perl data structures.
app-antivirus/clamav:clamdtop - A Top like tool which shows what clamd is currently scanning amongst other things
app-antivirus/clamav:metadata-analysis-api - Enables collection of file property metadata using ClamAV API for analysis by ClamAV bytecode programs.
app-antivirus/clamav:system-libmspack - Use system libmspack instead of built in
app-antivirus/clamav:xml - DMG and XAR support
app-arch/cabextract:extras - Install experimental extra tools: wince_info and wince_rename for examining and processing Windows CE installation cabinet header files; cabinfo for examining the structure of a cab file.
app-arch/cfv:bittorrent - Enable support for checking .torrent files
app-arch/dpkg:libmd - Use app-crypt/libmd library for message digest functions
app-arch/dpkg:update-alternatives - Install update-alternatives
app-arch/dump:ermt - encrypted rmt support
app-arch/dump:uuid - Enable UUID support
app-arch/engrampa:caja - Enable engrampa to integrate with mate-base/caja by providing entries in its context menu
app-arch/engrampa:magic - Enable filetype auto-detection via sys-apps/file
app-arch/engrampa:packagekit - Enable support for installing via app-admin/packagekit based on archive type
app-arch/file-roller:nautilus - Build contextual menu extension for gnome-base/nautilus.
app-arch/file-roller:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
app-arch/gzip:pic - disable optimized assembly code that is not PIC friendly
app-arch/innoextract:debug - Enable debug logging and the --debug command-line option
app-arch/innoextract:lzma - Enable support for extracting lzma-compressed installers using app-arch/xz-utils
app-arch/libarchive:bzip2 - Allow accessing bzip2-compressed archives through libbz2 (which comes with app-arch/bzip2). This only affects libarchive's native support: bsdtar will keep using bunzip2 as a filter if that's not built-in.
app-arch/libarchive:e2fsprogs - Use file flags from sys-fs/e2fsprogs headers instead of virtual/os-headers headers
app-arch/libarchive:lz4 - Enable support for LZ4 compression using app-arch/lz4
app-arch/libarchive:nettle - Use dev-libs/nettle as crypto backend
app-arch/libarchive:zlib - Allow accessing gzip-compressed archives through sys-libs/zlib. This only affects libarchive's native support: bsdtar will keep using gunzip as a filter if that's not built-in. It's also needed for supporting extraction of ZIP files.
app-arch/p7zip:rar - Enable support for non-free rar decoder
app-arch/pbzip2:symlink - Install symlinks which override app-arch/bzip2 implementation
app-arch/pigz:symlink - Install symlinks which override app-arch/gzip implementation
app-arch/rpm:zstd - Enable support for ZSTD compression using app-arch/zstd
app-arch/tar:minimal - just install `tar`
app-arch/unzip:natspec - Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
app-arch/xz-utils:extra-filters - Build additional filters that are not used in any of the default xz presets. This includes delta and BCJ coders, additional match finders and SHA256 checks.
app-arch/zip:natspec - Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
app-arch/zstd:lz4 - Enable support for LZ4 compression using app-arch/lz4
app-backup/amanda:ndmp - Support for the NDMP protocol
app-backup/amanda:s3 - Support for backing up to the Amazon S3 system
app-backup/amanda:xfs - Support for backing up raw XFS filesystems using xfsdump
app-backup/backup-manager:s3 - Support for backing up to the Amazon S3 system
app-backup/bacula:bacula-clientonly - Disable DB support, and just build a client
app-backup/bacula:bacula-nodir - Disable building of director
app-backup/bacula:bacula-nosd - Disable building of storage daemon
app-backup/bacula:logwatch - Install support files for logwatch
app-backup/btrbk:pv - Use sys-apps/pv to enable progress bar functionality
app-backup/dar:dar32 - Enables --enable-mode=32 option, which replace infinite by 32 bit integers
app-backup/dar:dar64 - Enables --enable-mode=64 option, which replace infinite by 64 bit integers
app-backup/dar:gcrypt - Enables strong encryption support
app-backup/dar:gpg - Enables usage of asymetric crypto algorithms
app-backup/deja-dup:nautilus - Build gnome-base/nautilus extension
app-backup/duplicity:s3 - Support for backing up to the Amazon S3 system
app-backup/fsarchiver:lz4 - Enable lz4 compression support
app-backup/fsarchiver:zstd - Enable zstd compression support
app-backup/snapper:btrfs - Include Btrfs support sys-fs/btrfs-progs
app-backup/snapper:ext4 - Include Ext4 support sys-fs/e2fsprogs
app-backup/snapper:lvm - Enable LVM thinprovisioned snapshots support sys-fs/lvm2
app-backup/snapper:xattr - Add support for getting and setting POSIX extended attributes, through sys-apps/attr.
app-benchmarks/httperf:idleconn - Build with the idleconn program
app-benchmarks/ramspeed:pic - Force shared libraries to be built as PIC (this is slower)
app-benchmarks/sysbench:aio - Enable libaio support
app-cdr/brasero:libburn - Enable dev-libs/libburn backend
app-cdr/brasero:nautilus - Build the gnome-base/nautilus extension
app-cdr/brasero:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
app-cdr/brasero:playlist - Enable support for playlists through dev-libs/totem-pl-parser
app-cdr/brasero:tracker - Enable audio playlist search using the app-misc/tracker indexer
app-cdr/cdemu:cdemu-daemon - Pull app-cdr/cdemu-daemon dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing.
app-cdr/dvdisaster:debug - Enable memory debugging.
app-cdr/gaffitter:scripts - Install additional gaffitter scripts for external programs
app-cdr/mirage2iso:pinentry - Support app-crypt/pinentry password input backend.
app-crypt/aespipe:asm - Enable assembly modules
app-crypt/aespipe:cpu_flags_x86_padlock - Use VIA padlock instructions, detected at run time, code still works on non-padlock processors
app-crypt/ccid:kobil-midentity - Build and install Kobil_mIDentity_switch tool
app-crypt/ccid:twinserial - Enable twinserial reader
app-crypt/gnupg:mta - Build mta support using virtual/mta.
app-crypt/gnupg:smartcard - Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd. Bring in dev-libs/libusb as a dependency; enable scdaemon.
app-crypt/gnupg:tofu - Enable support for Trust on First use trust model; requires dev-db/sqlite.
app-crypt/gnupg:tools - Install extra tools (including gpgsplit and gpg-zip).
app-crypt/gnupg:usb - Build direct CCID access for scdaemon; requires dev-libs/libusb.
app-crypt/gnupg:user-socket - try a socket directory which is not removed by init manager at session end
app-crypt/gnupg:wks-server - Install the wks-server
app-crypt/gpgme:common-lisp - Install common-lisp files
app-crypt/heimdal:hdb-ldap - Adds support for LDAP as a database backend
app-crypt/heimdal:otp - Adds support for one-time passwords
app-crypt/heimdal:pkinit - Adds support for PKINIT for the initial ticket
app-crypt/johntheripper:cuda - Use nvidia cuda toolkit for speeding up cracking on capable devices
app-crypt/johntheripper:mozilla - Support mozilla password cracking
app-crypt/johntheripper:opencl - Enable opencl support for speeding up cracking on capable devices
app-crypt/kstart:afs - Enables afs support which means you can acquire an afs token and set PAGs. It's recommended to set this USE if you need authenticated access to an AFS cell for your daemon/app.
app-crypt/libu2f-host:systemd - Use user ACLs rather than plugdev group to give user access to the HIDRAW device.
app-crypt/mit-krb5:doc - Creates and installs the API and implementation documentation. This is only useful if you want to develop software which depends on kerberos.
app-crypt/mit-krb5:keyutils - Enable for the keyring ccache using keyutils.
app-crypt/mit-krb5:openldap - Enable support for ldap as a database backend.
app-crypt/mit-krb5:pkinit - Enable pkinit support for the initial ticket.
app-crypt/p11-kit:asn1 - Enable ASN.1 certificate support
app-crypt/p11-kit:trust - Build the trust policy module
app-crypt/qca:botan - Enable botan plugin
app-crypt/qca:gcrypt - Enable gcrypt plugin
app-crypt/qca:gpg - Enable GnuPG plugin
app-crypt/qca:logger - Enable logger plugin
app-crypt/qca:nss - Enable NSS plugin
app-crypt/qca:pkcs11 - Enable PKCS#11 plugin
app-crypt/qca:sasl - Enable SASL plugin
app-crypt/qca:softstore - Enable softstore plugin
app-crypt/seahorse:ldap - Enable seahorse to manipulate GPG keys on a LDAP server.
app-crypt/tpm-tools:pkcs11 - Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.
app-crypt/veracrypt:asm - Enable assembly for optimization
app-dicts/aspell-be:classic - Support classic spelling by default
app-dicts/myspell-pt:preao - Use the pre ortographic agreement version of the dictionary
app-doc/clsync-docs:api - Install doxygen generated API docs.
app-doc/doxygen:clang - support for sys-devel/clang assisted parsing
app-doc/doxygen:dot - allow to create dot graphs using media-gfx/graphviz
app-doc/doxygen:doxysearch - build doxyindexer and doxysearch.cgi
app-doc/gnucash-docs:l10n_C - English
app-doc/kicad-doc:html - Generate documentation in HTML format
app-doc/kicad-doc:pdf - Generate documentation in PDF format
app-doc/linuxfromscratch:htmlsingle - Install all-on-one-page HTML version.
app-doc/pms:binary - Download pre-built files instead of building from sources
app-doc/pms:html - Generate PMS as .html as well
app-doc/pms:twoside - Enable two-sided layout suitable for printing
app-doc/tldp-howto:html - Install multi-chapter HTML docs
app-doc/tldp-howto:htmlsingle - Install all-on-one-page HTML docs
app-doc/tldp-howto:pdf - Install pdf docs
app-doc/tldp-howto:text - Install plain-text docs
app-editors/bluefish:gtk2 - Enable GTK2 instead of GTK3 even if GTK3 is available
app-editors/bluefish:gtk3 - Enable GTK3 interface (default)
app-editors/bluefish:gucharmap - Enable gucharmap dictionary plugin
app-editors/bluefish:python - Enable Python integration for zen-coding plugin
app-editors/bluefish:spell - Enable spell checking capabilities via enchant library
app-editors/emacs:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
app-editors/emacs:dynamic-loading - Enable loading of dynamic libraries at runtime
app-editors/emacs:games - Support shared score files for games
app-editors/emacs:gconf - Use gnome-base/gconf to read the system font name
app-editors/emacs:gfile - Use gfile (dev-libs/glib) for file notification
app-editors/emacs:gsettings - Use gsettings (dev-libs/glib) to read the system font name
app-editors/emacs:gtk2 - Prefer version 2 of the GIMP Toolkit to version 3 (x11-libs/gtk+)
app-editors/emacs:gtk3 - Prefer version 3 of the GIMP Toolkit to version 2 (x11-libs/gtk+)
app-editors/emacs:gzip-el - Compress bundled Emacs Lisp source
app-editors/emacs:imagemagick - Use media-gfx/imagemagick for image processing
app-editors/emacs:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
app-editors/emacs:mailutils - Retrieve e-mail using net-mail/mailutils instead of the internal movemail substitute
app-editors/emacs:source - Install C source files and make them available for find-function
app-editors/emacs:toolkit-scroll-bars - Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars
app-editors/emacs:wide-int - Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size.
app-editors/emacs:xwidgets - Enable use of GTK widgets in Emacs buffers (requires GTK3)
app-editors/fe:sendmail - Send mail after editor abend
app-editors/gedit-plugins:charmap - Insert special characters just by clicking on them
app-editors/gedit-plugins:git - Shows document changes related to git's HEAD
app-editors/gedit-plugins:terminal - Embed a terminal in the bottom pane
app-editors/gvim:cscope - Enable cscope interface
app-editors/gvim:gtk3 - Enable GTK+3 interface
app-editors/gvim:netbeans - Include netbeans external editor integration support
app-editors/gvim:racket - Enable support for Scheme using dev-scheme/racket
app-editors/jasspa-microemacs:nanoemacs - Build NanoEmacs instead of MicroEmacs
app-editors/joe:xterm - Enable full xterm clipboard support
app-editors/latexila:latexmk - Install dev-tex/latexmk (used by default for the build tools)
app-editors/latexila:rubber - Install dev-tex/rubber (can be used for the build tools)
app-editors/leafpad:emacs - Enable Emacs key theme
app-editors/mousepad:gtk3 - Use GTK+3 instead of GTK+2
app-editors/nano:debug - Enable debug messages and assert warnings. Note that these will all be sent straight to stderr rather than some logging facility.
app-editors/nano:justify - Enable justify/unjustify functions for text formatting.
app-editors/nano:magic - Add magic file support (sys-apps/file) to automatically detect appropriate syntax highlighting
app-editors/nano:minimal - Disable all fancy features, including ones that otherwise have a dedicated USE flag (such as spelling).
app-editors/okteta:designer - Build plugins for dev-qt/designer
app-editors/tea:aspell - Enable spellchecking using app-text/aspell
app-editors/tea:hunspell - Enable spellchecking using app-text/hunspell
app-editors/tea:qml - Enable support for plugins using QML
app-editors/vim:X - Link console vim against X11 libraries to enable title and clipboard features in xterm
app-editors/vim:cscope - Enable cscope interface
app-editors/vim:racket - Enable support for Scheme using dev-scheme/racket
app-editors/vim:terminal - Enable terminal emulation support
app-editors/vim:vim-pager - Install vimpager and vimmanpager links
app-editors/xemacs:athena - Chooses the MIT Athena widget set
app-editors/xemacs:dnd - Enables support for the x11-libs/dnd drag-n-drop library
app-editors/xemacs:eolconv - Support detection and translation of newline conventions
app-editors/xemacs:mule - Add multi-language support to XEmacs
app-editors/xemacs:pop - Support POP for mail retrieval
app-editors/xemacs:xim - Enable X11 XiM input method
app-editors/zile:valgrind - Enable usage of dev-util/valgrind in tests
app-emacs/auctex:preview-latex - Use bundled preview-latex
app-emacs/bbdb:tex - Install plain TeX support files
app-emacs/bbdb:vm - Add support for app-emacs/vm
app-emacs/emacs-common-gentoo:games - Support shared score files for games
app-emacs/org-mode:contrib - Install user-contributed files
app-emacs/org-mode:odt-schema - Install non-free schema files for OpenDocument Text exporter
app-emacs/slime:xref - Install xref.lisp cross-referencing tool
app-emacs/vm:bbdb - Include support for app-emacs/bbdb
app-emacs/wanderlust:bbdb - Include support for app-emacs/bbdb
app-emacs/wikipedia-mode:outline-magic - Enable support for outline-mode extensions (app-emacs/outline-magic)
app-emulation/containerd:apparmor - Support for AppArmor
app-emulation/containerd:btrfs - Support for BTRFS snapshot driver
app-emulation/containerd:cri - Support for Kubernetes CRI
app-emulation/docker:apparmor - Enable AppArmor support.
app-emulation/docker:aufs - Enables dependencies for the "aufs" graph driver, including necessary kernel flags.
app-emulation/docker:btrfs - Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.
app-emulation/docker:container-init - Makes the a staticly-linked init system tini available inside a container.
app-emulation/docker:device-mapper - Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.
app-emulation/docker:overlay - Enables dependencies for the "overlay" graph driver, including necessary kernel flags.
app-emulation/docker:pkcs11 - Enables pkcs-11 support.
app-emulation/docker-runc:ambient - Enable support for ambient capability
app-emulation/docker-runc:apparmor - Enable AppArmor support
app-emulation/dosemu:fluidsynth - use media-sound/fluidsynth for MIDI emulation
app-emulation/e-uae:capslib - Add CAPS library support
app-emulation/e-uae:sdl-sound - Use media-libs/sdl-sound for audio output
app-emulation/free42:alsa - Adds support for Advanced Linux Sound Architecture
app-emulation/ganeti:drbd - Enable DRBD support
app-emulation/ganeti:experimental - Enable experimental patches. Warning! This will break RPC within major versions if the patches applied differ!
app-emulation/ganeti:haskell-daemons - Build haskell daemons instead of python
app-emulation/ganeti:htools - Enable htools support
app-emulation/ganeti:kvm - Enable KVM support
app-emulation/ganeti:lxc - Enable Linux Countainers support
app-emulation/ganeti:monitoring - Enable the ganeti monitoring daemon
app-emulation/ganeti:multiple-users - Enable support for running VMs as different users
app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/ganeti:restricted-commands - Enable restricted commands in the node daemon
app-emulation/ganeti:xen - Enable Xen support
app-emulation/libcacard:passthrough - Enable smartcard passthrough support via sys-apps/pcsc-lite
app-emulation/libvirt:apparmor - Enable AppArmor support
app-emulation/libvirt:firewalld - DBus interface to iptables/ebtables allowing for better runtime management of your firewall.
app-emulation/libvirt:fuse - Allow LXC to use sys-fs/fuse for mount points
app-emulation/libvirt:glusterfs - Enable GlusterFS support via sys-cluster/glusterfs
app-emulation/libvirt:iscsi - Allow using an iSCSI remote storage server as pool for disk image storage
app-emulation/libvirt:libssh - Use net-libs/libssh to communicate with remote libvirtd hosts, for example: qemu+libssh://server/system
app-emulation/libvirt:libvirtd - Builds the libvirtd daemon as well as the client utilities instead of just the client utilities
app-emulation/libvirt:lvm - Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage
app-emulation/libvirt:lxc - Support management of Linux Containers virtualisation (app-emulation/lxc)
app-emulation/libvirt:macvtap - Support for MAC-based TAP (macvlan/macvtap). For networking instead of the normal TUN/TAP. It has its advantages and disadvantages. macvtap support requires very new kernels and is currently evolving. Support for this is experimental at best.
app-emulation/libvirt:nfs - Allow using Network File System mounts as pool for disk image storage
app-emulation/libvirt:numa - Use NUMA for memory segmenting via sys-process/numactl and sys-process/numad
app-emulation/libvirt:openvz - Support management of OpenVZ virtualisation (openvz-sources)
app-emulation/libvirt:parted - Allow using real disk partitions as pool for disk image storage, using sys-block/parted to create, resize and delete them.
app-emulation/libvirt:pcap - Support auto learning IP addreses for routing
app-emulation/libvirt:phyp - Support IBM HMC / IVM hypervisor via PHYP protocol
app-emulation/libvirt:qemu - Support management of QEMU virtualisation (app-emulation/qemu)
app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/libvirt:uml - Support management of User Mode Linux virtualisation
app-emulation/libvirt:vepa - Virtual Ethernet Port Aggregator (VEPA) / 802.1Qbg support. Relies on macvtap support.
app-emulation/libvirt:virt-network - Enable virtual networking (NAT) support for guests. Includes all the dependencies for NATed network mode. Effectively any network setup that relies on libvirt to setup and configure network interfaces on your host. This can include bridged and routed networks ONLY if you are allowing libvirt to create and manage the underlying devices for you. In some cases this requires enabling the 'netcf' USE flag (currently unavailable).
app-emulation/libvirt:virtualbox - Support management of VirtualBox virtualisation (one of app-emulation/virtualbox or app-emulation/virtualbox-bin)
app-emulation/libvirt:wireshark-plugins - Build the net-analyzer/wireshark plugin for the Libvirt RPC protocol
app-emulation/libvirt:xen - Support management of Xen virtualisation (app-emulation/xen)
app-emulation/libvirt:zfs - Enable ZFS backend storage sys-fs/zfs
app-emulation/lxc:apparmor - Enable AppArmor support
app-emulation/lxc:cgmanager - Enable support for cgroup management using app-admin/cgmanager
app-emulation/lxc:templates - Install old style templates through app-emulation/lxc-templates
app-emulation/lxd:daemon - Build the system daemon, not just the client tool
app-emulation/lxd:dnsmasq - Depend on dnsmasq to provide DHCP and DNS
app-emulation/lxd:tools - Build and install optional tools
app-emulation/q4wine:ico - Enable ico support via media-gfx/icoutils
app-emulation/q4wine:iso - Support unprivileged mounting of ISO9660 images via sys-fs/fuseiso
app-emulation/q4wine:wineappdb - Enable Wine AppDB browser support
app-emulation/qemu:accessibility - Adds support for braille displays using brltty
app-emulation/qemu:aio - Enables support for Linux's Async IO
app-emulation/qemu:alsa - Enable alsa output for sound emulation
app-emulation/qemu:capstone - Enable disassembly support with dev-libs/capstone
app-emulation/qemu:curl - Support ISOs / -cdrom directives vis HTTP or HTTPS.
app-emulation/qemu:fdt - Enables firmware device tree support
app-emulation/qemu:glusterfs - Enables GlusterFS cluster fileystem via sys-cluster/glusterfs
app-emulation/qemu:gnutls - Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support. For 2.0 through 2.3 also enables disk quorum support.
app-emulation/qemu:gtk2 - Use gtk-2 instead of gtk-3
app-emulation/qemu:iscsi - Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does.
app-emulation/qemu:jpeg - Enable jpeg image support for the VNC console server
app-emulation/qemu:ncurses - Enable the ncurses-based console
app-emulation/qemu:nfs - Enable NFS support
app-emulation/qemu:numa - Enable NUMA support
app-emulation/qemu:pin-upstream-blobs - Pin the versions of BIOS firmware to the version included in the upstream release. This is needed to sanely support migration/suspend/resume/snapshotting/etc... of instances. When the blobs are different, random corruption/bugs/crashes/etc... may be observed.
app-emulation/qemu:png - Enable png image support for the VNC console server
app-emulation/qemu:pulseaudio - Enable pulseaudio output for sound emulation
app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
app-emulation/qemu:sdl - Enable the SDL-based console
app-emulation/qemu:sdl2 - Use libsdl2 instead of libsdl
app-emulation/qemu:snappy - Enable support for snappy compression
app-emulation/qemu:spice - Enable Spice protocol support via app-emulation/spice
app-emulation/qemu:ssh - Enable SSH based block device support via net-libs/libssh2
app-emulation/qemu:static - Build the User and Software MMU (system) targets as well as tools as static binaries
app-emulation/qemu:static-user - Build the User targets as static binaries
app-emulation/qemu:systemtap - Enable SystemTAP/DTrace tracing
app-emulation/qemu:tci - Enable the TCG Interpreter which can speed up or slowdown workloads depending on the host and guest CPUs being emulated. In the future it will be a runtime option but for now its compile time.
app-emulation/qemu:usb - Enable USB passthrough via dev-libs/libusb
app-emulation/qemu:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
app-emulation/qemu:vde - Enable VDE-based networking
app-emulation/qemu:vhost-net - Enable accelerated networking using vhost-net, see http://www.linux-kvm.org/page/VhostNet
app-emulation/qemu:virgl - Enable experimental Virgil 3d (virtual software GPU)
app-emulation/qemu:virtfs - Enable VirtFS via virtio-9p-pci / fsdev. See http://wiki.qemu.org/Documentation/9psetup
app-emulation/qemu:vte - Enable terminal support (x11-libs/vte) in the GTK+ interface
app-emulation/qemu:xattr - Add support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend.
app-emulation/qemu:xen - Enables support for Xen backends
app-emulation/qemu:xfs - Support xfsctl() notification and syncing for XFS backed virtual disks.
app-emulation/runc:ambient - Enable support for ambient capabilities set (Requires Linux kernel 4.3 or later).
app-emulation/runc:apparmor - Enable AppArmor support.
app-emulation/runc:kmem - Enable Kernel Memory Accounting.
app-emulation/spice:lz4 - Enable support for LZ4 compression using app-arch/lz4
app-emulation/spice:smartcard - Enable smartcard remoting using app-emulation/libcacard
app-emulation/spice-vdagent:consolekit - Use sys-auth/consolekit to determine the master vdagentd in case of multiple running vdagentds (highly recommended)
app-emulation/vice:ethernet - Enable ethernet emulation
app-emulation/vice:fullscreen - Enable the ability to run fullscreen
app-emulation/vice:sdlsound - Use media-libs/libsdl for sound support
app-emulation/vice:vte - Enable support for x11-libs/vte in the GTK+ interface
app-emulation/virt-manager:policykit - Enables sys-auth/polkit authentication support, required when using app-emulation/libvirt with PolicyKit authentication
app-emulation/virt-manager:sasl - Depend on the proper libraries needed to connect to SASL-enabled libvirtd instances (e.g. Kerberos-protected instances).
app-emulation/virt-viewer:spice - Support connecting to SPICE-enabled virtual machines.
app-emulation/virt-viewer:vnc - Support connecting to VNC-enabled virtual machines.
app-emulation/virt-what:dmi - Use sys-apps/dmidecode to read firmware data
app-emulation/virtualbox:headless - Build without any graphic frontend
app-emulation/virtualbox:lvm - Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2.
app-emulation/virtualbox:pax_kernel - Apply patch needed for pax enabled kernels.
app-emulation/virtualbox:sdk - Enable building of SDK
app-emulation/virtualbox:udev - Controls installation of special USB udev rules.
app-emulation/virtualbox:vboxwebsrv - Build and install the VirtualBox webservice
app-emulation/virtualbox-modules:pax_kernel - Apply patch needed for pax enabled kernels
app-emulation/wine-vanilla:capi - Enable ISDN support via CAPI
app-emulation/wine-vanilla:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine-vanilla:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine-vanilla:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine-vanilla:gssapi - Use GSSAPI (Kerberos SSP support)
app-emulation/wine-vanilla:gstreamer - Use media-libs/gstreamer to provide DirectShow functionality;
app-emulation/wine-vanilla:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine-vanilla:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine-vanilla:opencl - Enable OpenCL support
app-emulation/wine-vanilla:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine-vanilla:pcap - Support packet capture software (e.g. wireshark)
app-emulation/wine-vanilla:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine-vanilla:prelink - Run prelink on DLLs during build; For Gentoo hardened, do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine-vanilla:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine-vanilla:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine-vanilla:samba - Add support for NTLM auth. See: https://web.archive.org/web/20160108123008/http://wiki.winehq.org:80/NtlmAuthSetupGuide and https://web.archive.org/web/20150906013746/http://wiki.winehq.org/NtlmSigningAndSealing (these pages are not currently in the updated WineHQ Wiki).
app-emulation/wine-vanilla:sdl - Add support for gamepad detection using SDL
app-emulation/wine-vanilla:udev - Use virtual/libudev to provide plug and play support
app-emulation/wine-vanilla:vkd3d - Use app-emulation/vkd3d to provide Direct3D 12 support
app-emulation/wine-vanilla:vulkan - Enable Vulkan drivers
app-emulation/winetricks:rar - Pull in app-arch/unrar for extraction of rar-compressed game files
app-emulation/x48:readline - Enables support for libreadline
app-emulation/xen:efi - Adds efi boot support, requires LDFLAG -melf_x86_64 for amd64
app-emulation/xen:flask - Enable the Flask XSM module from NSA
app-emulation/xen-tools:api - Build the C libxenapi bindings
app-emulation/xen-tools:flask - Enable the Flask XSM module from NSA
app-emulation/xen-tools:hvm - Enable support for hardware based virtualization (VT-x,AMD-v)
app-emulation/xen-tools:ocaml - Enable support for the ocaml language
app-emulation/xen-tools:ovmf - Enable support to boot UEFI guest vm, needed by hvm
app-emulation/xen-tools:pam - Enable pam support
app-emulation/xen-tools:pygrub - Install the pygrub boot loader
app-emulation/xen-tools:qemu - Enable IOEMU support via the use of qemu-dm
app-emulation/xen-tools:qemu-traditional - Build the old qemu traditional device model (useful only if you cannot change to the new device model e.g. Windows VMs)
app-emulation/xen-tools:screen - Enable support for running domain U console in an app-misc/screen session
app-emulation/xen-tools:system-qemu - Using app-emulation/qemu instead of the bundled one
app-emulation/xen-tools:system-seabios - Using sys-firmware/seabios instead of the bundled one
app-emulation/xtrs:ls-dos - Install LS-DOS disk images for Model 4P
app-eselect/eselect-php:fpm - Enable the FastCGI Process Manager SAPI
app-forensics/afflib:fuse - Enable extra fuse thingies
app-forensics/afflib:qemu - Enable qemu stuff
app-forensics/afflib:s3 - Enable support for Amazon S3
app-forensics/aide:e2fs - Enable support for checking file attributes on ext2/ext3/ext4 filesystems
app-forensics/aide:prelink - Bypass prelinking when calculating checksums
app-forensics/chkrootkit:cron - Install cron script for weekly rootkit scans
app-forensics/libewf:bfio - Enables libbfio for chaining file in file handling
app-forensics/libewf:fuse - Enable fuse support for ewfmount
app-forensics/libewf:uuid - Enable UUID support in the ewftools
app-forensics/sleuthkit:aff - Enable extra aff formats
app-forensics/sleuthkit:ewf - Enable libewf support
app-i18n/anthy:canna-2ch - Enable support for app-dicts/canna-2ch
app-i18n/canna:canuum - Build canuum
app-i18n/fcitx:autostart - Enable XDG-compatible autostart of Fcitx
app-i18n/fcitx:enchant - Enable Enchant backend (using app-text/enchant) for spelling hinting
app-i18n/fcitx:gtk2 - Install input method module for GTK+ 2
app-i18n/fcitx:gtk3 - Install input method module for GTK+ 3
app-i18n/fcitx:opencc - Enable OpenCC engine (using app-i18n/opencc) for converter between Simplified Chinese and Traditional Chinese
app-i18n/fcitx:pango - Enable support for x11-libs/pango
app-i18n/fcitx:table - Install table input methods for Simplified Chinese
app-i18n/fcitx-libpinyin:dictionary-manager - Install dictionary manager
app-i18n/fcitx-rime:configuration_tool - Install configuration tool
app-i18n/fcitx-unikey:macro-editor - Install macro editor
app-i18n/freewnn:uum - Build uum
app-i18n/ibus:emoji - Enable support for Emoji
app-i18n/ibus:gconf - Enable support for gnome-base/gconf
app-i18n/ibus:gtk2 - Enable support for x11-libs/gtk+:2
app-i18n/ibus:unicode - Enable support for Unicode choice
app-i18n/ibus-handwrite:zinnia - Enable support for app-i18n/zinnia
app-i18n/ibus-libpinyin:boost - Compile against dev-libs/boost libraries
app-i18n/ibus-libpinyin:opencc - Enable support for app-i18n/opencc
app-i18n/ibus-m17n:gtk2 - Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-i18n/ibus-pinyin:boost - Enable support for dev-libs/boost
app-i18n/mozc:fcitx4 - Enable support for app-i18n/fcitx 4
app-i18n/mozc:gui - Install graphical user interface tool (mozc_tool)
app-i18n/mozc:handwriting-tegaki - Use handwriting recognition model from app-i18n/tegaki-zinnia-japanese
app-i18n/mozc:handwriting-tomoe - Use handwriting recognition model from app-i18n/zinnia-tomoe
app-i18n/mozc:ibus - Enable support for app-i18n/ibus
app-i18n/mozc:renderer - Enable native candidate window
app-i18n/pyzy:boost - Enable support for dev-libs/boost
app-i18n/pyzy:doc - Generate API documentation
app-i18n/pyzy:opencc - Enable support for app-i18n/opencc
app-i18n/rime-data:extra - Install extra packages
app-i18n/scim:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/scim-anthy:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/scim-anthy:kasumi - Use Anthy dictionary maintenance tool (app-dicts/kasumi)
app-i18n/tomoe:hyperestraier - Enable support for app-text/hyperestraier
app-i18n/uim:anthy - Enable support for app-i18n/anthy
app-i18n/uim:eb - Enable support for dev-libs/eb
app-i18n/uim:gtk2 - Enable support for x11-libs/gtk+:2
app-i18n/uim:skk - Enable support for app-i18n/skk-jisyo
app-laptop/hdapsd:libconfig - Require dev-libs/libconfig to allow the daemon to read a configuration file at startup
app-laptop/thinkfan:atasmart - include libatasmart support to get disc temperature
app-laptop/tp_smapi:hdaps - Install a compatible HDAPS module
app-metrics/collectd:contrib - Install user-contributed files in the doc directory
app-metrics/collectd:filecaps - When set collectd daemon will have set required capabilities to run most plugins even if run as unprivileged user
app-metrics/collectd:java - Must be set (workaround for java-pkg-opt-2 eclass limitation) when you want java or genericjmx plugin
app-metrics/collectd:udev - Enable optional udev usage in disk plugin; Required for smart plugin
app-metrics/collectd:xfs - Enable optional capability to filter on XFS file system in df plugin; Requires XFS headers from sys-fs/xfsprogs
app-misc/binwalk:graph - Enable support for generating entropy graphs
app-misc/byobu:screen - Use app-misc/screen as the default backend
app-misc/ca-certificates:cacert - Include root certificates from CAcert (http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/)
app-misc/ca-certificates:insecure_certs - Install certificates which are known to be untrustworthy.
app-misc/digitemp:ds2490 - Build support for the ds2490 sensor
app-misc/digitemp:ds9097 - Build support for the ds9097 sensor
app-misc/digitemp:ds9097u - Build support for the ds9097u sensor
app-misc/emelfm2:ansi - Add support for ANSI escape sequences
app-misc/emelfm2:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
app-misc/freemind:groovy - Build plugin for scripting via Groovy
app-misc/freemind:latex - Build plugin for inserting mathematical formulas in LaTeX syntax
app-misc/freemind:pdf - Build plugin for exporting mindmaps to SVG and PDF
app-misc/freemind:svg - Build plugin for exporting mindmaps to SVG and PDF
app-misc/gcstar:stats - Enable statistics reporting
app-misc/gcstar:tellico - Enable support for kde-misc/tellico files
app-misc/geoclue:geonames - Install geonames.org provider
app-misc/geoclue:gsmloc - Install GSM location provider
app-misc/geoclue:gtk - Install gtk-based geoclue-test-gui
app-misc/geoclue:hostip - Install hostip.info provder
app-misc/geoclue:manual - Install manual provider
app-misc/geoclue:modemmanager - Enable geolocation through 3G or GPS enabled hardware through net-misc/modemmanager.
app-misc/geoclue:nominatim - Install openstreetmap.org provider
app-misc/geoclue:plazes - Install plazes.com provider
app-misc/geoclue:skyhook - Install skyhookwireless.com provider
app-misc/geoclue:yahoo-geo - Install Yahoo geolocation provider
app-misc/geoclue:zeroconf - Enable retrieval of GPS location from Android devices with https://wiki.gnome.org/Apps/GeoclueShare
app-misc/gourmet:i18n - Enable support for i18n through elib.intl
app-misc/gourmet:ipython - Enable support for the interactive Python console plugin
app-misc/gourmet:pdf - Enable export to PDF
app-misc/gourmet:print - Enable pretty Python printing
app-misc/gourmet:spell - Enable support for the spell check plugin
app-misc/gourmet:web - Enable support for the web import plugin
app-misc/gramps:geo - Enable rendering of geographical data using sci-geosciences/osm-gps-map
app-misc/gramps:rcs - Adds support for family tree archives via dev-vcs/rcs
app-misc/gramps:reports - All external software that is needed for graphical reports will be installed
app-misc/graphlcd-base:g15 - Add support for app-misc/g15daemon driver (e.g. Logitech G15 Keybord)
app-misc/jq:oniguruma - Use dev-libs/oniguruma for regular expression support
app-misc/lcd4linux:apm - Enable the APM plugin.
app-misc/lcd4linux:asterisk - Enable the Asterisk plugin.
app-misc/lcd4linux:button_exec - Enable the Button plugin, to execute something on keypress.
app-misc/lcd4linux:cpuinfo - Enable the cpuinfo plugin.
app-misc/lcd4linux:dbus - Enable the dbus plugin.
app-misc/lcd4linux:diskstats - Enable the diskstats plugin.
app-misc/lcd4linux:dmalloc - Enable dmalloc for debugging.
app-misc/lcd4linux:dvb - Enable support for the DVB plugin.
app-misc/lcd4linux:event - Enable the event plugin.
app-misc/lcd4linux:exec - Enable the exec plugin, to read output from external programs.
app-misc/lcd4linux:fifo - Enable the FIFO (First-In, First-Out) plugin.
app-misc/lcd4linux:file - Enable the file plugin, to read from input from files.
app-misc/lcd4linux:gps - Enable the gps plugin, for reading gps coordinates.
app-misc/lcd4linux:hddtemp - Enable the hddtemp plugin, to read from the hddtemp daemon.
app-misc/lcd4linux:huawei - Enable the huawei plugin, to read from a huawei device.
app-misc/lcd4linux:i2c_sensors - Enable the i2c_sensors plugin, to read sensor data.
app-misc/lcd4linux:iconv - Enable the iconv plugin, to convert between encodings.
app-misc/lcd4linux:isdn - Enable the isdn plugin, to get information about ISDN.
app-misc/lcd4linux:kvv - Enable the kvv plugin, to get realtime train schedule from the Karlsruher Verkehrsverbund.
app-misc/lcd4linux:loadavg - Enable the loadavg plugin, to get stats load
app-misc/lcd4linux:meminfo - Enable the meminfo plugin, to get memory statistics.
app-misc/lcd4linux:mpd - Enable the mpd plugin, to read from the Music Player Daemon.
app-misc/lcd4linux:mpris_dbus - Enable the mpris plugin, to read data via dbus for mpris.
app-misc/lcd4linux:mysql - Enable the mysql plugin, to get mysql database information.
app-misc/lcd4linux:netdev - Enable the netdev plugin, to get interface statistics.
app-misc/lcd4linux:netinfo - Enable the netinfo plugin, to get more interface statistic.
app-misc/lcd4linux:outb - Enable raw i/o access.
app-misc/lcd4linux:pop3 - Enable the pop3 plugin, to get notified about new mails.
app-misc/lcd4linux:proc_stat - Enable the proc_stat plugin, to read data from the proc file system.
app-misc/lcd4linux:python - Enable support for dev-lang/python and enable the python plugin, to execute own python scripts.
app-misc/lcd4linux:qnaplog - Enable the qnaplog plugin, to read a log from a QNAP device.
app-misc/lcd4linux:raspi - Enable the raspi plugin, to read sensor data from a Raspberry Pi.
app-misc/lcd4linux:sample - Enable the sample plugin.
app-misc/lcd4linux:statfs - Enable the statfs plugin, to get statistics about the file system.
app-misc/lcd4linux:uname - Enable the uname plugin, to get the output of uname.
app-misc/lcd4linux:uptime - Enable the uptime plugin.
app-misc/lcd4linux:w1retap - Enable the w1retap plugin.
app-misc/lcd4linux:wireless - Enable the wireless plugin, to get wireless statistics.
app-misc/lcdproc:ethlcd - Enable support for ethlcd in the hd44780 driver.
app-misc/lcdproc:extra-charmaps - Enable extra language specific charmaps.
app-misc/lcdproc:freetype - Enable support for media-libs/freetype in the glcd driver.
app-misc/lcdproc:ftdi - Enable support for dev-embedded/libftdi in the glcd,hd44780,i2500vfd,lis and ula200 driver.
app-misc/lcdproc:hid - Enable support for dev-libs/libhid in the cfontz,cfontzpacket,cwlnx,glcd,lb216,mdm166a,mtc_s16209x and noritakevfd driver.
app-misc/lcdproc:irman - Enable support for media-libs/libirman in the irman driver.
app-misc/lcdproc:menu - Enable menu support in the lcdproc client.
app-misc/lcdproc:nfs - Display NFS filesystem stats in the lcdproc client.
app-misc/lcdproc:png - Enable support for media-libs/libpng in the glcd driver.
app-misc/lcdproc:samba - Display SMBFS filesystem stats in the lcdproc client.
app-misc/lcdproc:seamless-hbars - Don't produce any gaps in horizontal bar graphs, if hardware supports it.
app-misc/lcdproc:test-menu - Enable test menu support for the lcdproc server.
app-misc/lirc:audio - Support using an audio device connected to an IR receiver
app-misc/lirc:devinput - Support the devinput input device
app-misc/lirc:ftdi - Support FTDI devices
app-misc/lirc:gtk - Include GTK support which enables the use of lirc-setup
app-misc/lirc:inputlirc - Add a dependency on app-misc/inputlircd
app-misc/lirc:uinput - Enable support for uinput
app-misc/mc:edit - Compile and install the mcedit application
app-misc/mc:mclib - Compile and install the libmc.so shared library
app-misc/mc:sftp - Add support for sftp (uses net-libs/libssh2 for it).
app-misc/mc:slang - Use sys-libs/slang instead of sys-libs/ncurses.
app-misc/mc:xdg - Toggles mc's config dir location. Enable for $XDG_CONFIG_HOME/mc, disable for $HOME/.mc
app-misc/mosquitto:bridge - Enable bridge support in the MQTT broker.
app-misc/mosquitto:persistence - Store messages and subscriptions to a file.
app-misc/mosquitto:srv - Include SRV lookup support.
app-misc/mosquitto:websockets - Support the WebSocket protocol.
app-misc/muttprint:doc - Builds documentation
app-misc/neofetch:X - Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal
app-misc/note:general - Add support for ascii flatfile backend
app-misc/note:text - Add support for text backend
app-misc/pax-utils:python - Install a more powerful/faster version of lddtree
app-misc/recoll:camelcase - Enable indexing for camelCase sentences and words
app-misc/recoll:inotify - Use the Linux Kernel notification subsystem for monitoring file alterations in realtime
app-misc/recoll:session - Stop monitoring file alterations when X11 session terminates
app-misc/rlwrap:debug - Enable debug
app-misc/screen:multiuser - Enable multiuser support (by setting correct permissions)
app-misc/screen:nethack - Express error messages in nethack style
app-misc/screen:utmp - Include utmp support
app-misc/screenfetch:X - Use the media-gfx/scrot package to take screenshots
app-misc/skim:tmux - Install sk-tmux script to run skim in a tmux pane
app-misc/skim:vim - Install vim plugin for skim
app-misc/sphinx:id64 - use 64-bit document and word IDs
app-misc/sphinx:mariadb - Add mariadb database support
app-misc/sphinx:re2 - use the dev-libs/re2 regular expression library
app-misc/sphinx:stemmer - Enable language stemming support
app-misc/task:sync - Enable "task sync" support
app-misc/tmux:utempter - Include libutempter support
app-misc/towitoko:moneyplex - Makes libtowitoko work for the moneyplex home banking software
app-misc/tracker:cue - Enable cue sheet parsing
app-misc/tracker:firefox-bookmarks - Install bookmark data miner plugin for www-client/firefox and www-client/firefox-bin
app-misc/tracker:gsf - Enable gnome-extra/libgsf based data extractor and for ODT.
app-misc/tracker:iptc - Enable extraction of IPTC data from pictures
app-misc/tracker:iso - Enable extraction of metadata from ISO disk images
app-misc/tracker:miner-fs - Enable tracker-miner-fs (required for filesystem indexing)
app-misc/tracker:nautilus - Enable tracker to integrate with gnome-base/nautilus by providing entries in its context menu
app-misc/tracker:playlist - Add support for playlists
app-misc/tracker:stemmer - Add word stemming via dev-libs/snowball-stemmer.
app-misc/tracker:thunderbird - Install email data miner plugin for mail-client/thunderbird and mail-client/thunderbird-bin
app-misc/tracker:xps - Add support for XPS file format through app-text/libgxps.
app-misc/unfoo:minimal - Do not install all support archive binaries
app-misc/vifm:X - Add support for X11
app-misc/vifm:developer - Enable features of interest to developers
app-misc/vifm:extended-keys - Support for extended keys (arrows, home etc)
app-misc/vifm:gtk - Use gtk+ to determine mimetypes
app-misc/vifm:magic - Use libmagic to determine mimetypes
app-misc/vifm:vim - Install the vifm vim plugin and vim-compatible documentation
app-misc/vifm:vim-syntax - Pulls in related vim syntax scripts
app-misc/worker:avfs - Enable support for sys-fs/avfs
app-misc/worker:magic - Add magic file support from sys-apps/file to automatically detect file types
app-misc/workrave:mate - Add support for MATE panel
app-misc/workrave:xfce - Add support for XFCE panel
app-mobilephone/gammu:bluetooth - Enables bluetooth support
app-mobilephone/gammu:curl - Enables curl support
app-mobilephone/gammu:irda - Enables infrared support
app-mobilephone/gammu:mysql - Use mysql for data storage
app-mobilephone/gammu:nls - Enable native language support
app-mobilephone/gammu:odbc - Use ODBC as DB connector
app-mobilephone/gammu:postgres - Use PostgreSQL for data storage
app-mobilephone/gammu:usb - Enable USB suport
app-mobilephone/gnokii:ical - Enable support for dev-libs/libical
app-mobilephone/gnokii:irda - Enable infrared support
app-mobilephone/gnokii:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite
app-mobilephone/gnokii:sms - Enable SMS support (build smsd)
app-office/abiword:collab - Enable collaborative editing plugin
app-office/abiword:goffice - Enable goffice plugin
app-office/abiword:grammar - Enable grammar checking via dev-libs/link-grammar
app-office/abiword:map - Enable world map support through media-libs/libchamplain
app-office/abiword:math - Enable support for x11-libs/gtkmathview
app-office/abiword:ots - Enable Text Summarizer plugin
app-office/abiword:plugins - Enable plugins build (see http://www.abisource.com/wiki/PluginMatrix for more information). If your file cannot be opened due lack of support, try enabling this.
app-office/abiword:redland - Enables support redland and raptor libs.
app-office/abiword:thesaurus - Enable thesaurus support
app-office/abiword:wordperfect - Enable wordperfect file support via app-text/libwpd
app-office/calligra:activities - Enable kactivities support
app-office/calligra:gemini - Enable tablet and 2:1 devices support
app-office/calligra:import-filter - Enable support for various import filter file formats like WordPerfect, Visio and Apple Keynote
app-office/calligra:lcms - Build colorengine plugins using media-libs/lcms
app-office/calligra:okular - Enable bindings for kde-apps/okular
app-office/calligra:phonon - Build stage/eventplugins and videoshape plugin using media-libs/phonon
app-office/calligra:pim - Enable support for KDE PIM resources integration
app-office/calligra:spacenav - Enable support for the 3Dconnexion spacenav input device via dev-libs/libspnav
app-office/glabels:barcode - Enable barcode support through external libraries.
app-office/gnucash:aqbanking - Connect to some internet banks via AqBanking
app-office/gnucash:chipcard - Enable support for chipcard reading and processing.
app-office/gnucash:gui - Enable graphic interface (needs net-libs/webkit-gtk:4 and x11-libs/gtk+:3)
app-office/gnucash:quotes - Enable Online Stock Quote retrieval
app-office/gnucash:register2 - Use the new register (Experimental)
app-office/gnumeric:libgda - Enable database support through gnome-extra/libgda.
app-office/gnumeric:perl - Enable perl plugin loader.
app-office/gnumeric:python - Enable python plugin loader.
app-office/kexi:experimental - Enable features deemed experimental by upstream
app-office/kexi:marble - Enable displaying of maps using kde-apps/marble
app-office/kexi:mdb - Enable support for Microsoft Access database
app-office/kexi:webkit - Enable web form designer widget using dev-qt/qtwebkit
app-office/kmymoney:activities - Enable kde-frameworks/kactivities integration
app-office/kmymoney:addressbook - Enable kde-apps/akonadi contact integration
app-office/kmymoney:hbci - Enable HBCI support using net-libs/aqbanking
app-office/kmymoney:holidays - Enable kde-frameworks/kholidays integration
app-office/kmymoney:quotes - Enable Online Stock Quote retrieval
app-office/kmymoney:weboob - Enable import of online banking transactions extracted by www-client/weboob
app-office/libreoffice:coinmp - Use sci-libs/coinor-mp as alternative solver
app-office/libreoffice:googledrive - Enable support for remote files on Google Drive
app-office/libreoffice:gtk2 - Enable legacy gtk2 frontend
app-office/libreoffice:odk - Build the Office Development Kit
app-office/libreoffice:pdfimport - Enable PDF import via the Poppler library
app-office/libreoffice:vlc - Use media-video/vlc for video embedding
app-office/libreoffice-l10n:offlinehelp - Install help files locally instead of using the LibreOffice Wiki
app-office/lyx:aspell - Add support for aspell spellchecking
app-office/lyx:dia - Add support for diagrams (app-office/dia)
app-office/lyx:docbook - Add support for docbook export
app-office/lyx:dot - Add support for DOT import (media-gfx/graphviz)
app-office/lyx:enchant - Add support for enchant spellchecking wrapper (both aspell and hunspell can be used by LyX).
app-office/lyx:gnumeric - Add support for importing Gnumeric/OpenOffice/MS Excel spreadsheets into LyX.
app-office/lyx:html - Add support for HTML import
app-office/lyx:hunspell - Add support for spellchecking based on hunspell and reuse system-wide OpenOffice dictionaries. This also enable thesaurus dictionaries not accessible via aspell.
app-office/lyx:monolithic-build - This should speed up compilation significantly when you have enough RAM (> 600 MB)
app-office/lyx:rcs - Add support for revision control via dev-vcs/rcs
app-office/lyx:rtf - Add support for RTF import/export packages
app-office/orage:clock-panel-plugin - Build the clock plugin for the XFCE panel
app-office/scribus:boost - Enable support for Boost based enhancement
app-office/scribus:hunspell - Enable support for spell checking with app-text/hunspell
app-office/scribus:minimal - Don't install headers (only required for e.g. plug-in developers)
app-office/scribus:osg - 3D redering via dev-games/openscenegraph
app-office/scribus:scripts - Install the scripts
app-office/scribus:templates - Document tamplates
app-office/scribus:tk - Install tk based scripts e.g. FontSample.py
app-office/skrooge:activities - Enable kactivities support
app-office/skrooge:designer - Build plugins for dev-qt/designer
app-office/texmacs:netpbm - Add support for media-libs/netpbm
app-office/texstudio:video - Use phonon for video embedding
app-pda/gtkpod:clutter - Enable clutter support for displaying coverart
app-portage/conf-update:colordiff - Use colors when displaying diffs (app-misc/colordiff)
app-portage/conf-update:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
app-portage/eix:debug - Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use.
app-portage/eix:doc - Create description of the eix cache file additionally in html format
app-portage/eix:sqlite - Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix
app-portage/gemato:blake2 - Install dependencies needed for BLAKE2 hash functions
app-portage/gemato:gpg - Install dependencies needed for OpenPGP signature verification support
app-portage/gemato:sha3 - Install dependencies needed for SHA3 hash functions
app-portage/gemato:tools - Install additional utilities (benchmarks, hash testing tools, fast Manifest generators) to /usr/share/gemato.
app-portage/grs:server - Install all the tools building systems
app-portage/layman:bazaar - Support dev-vcs/bzr based overlays
app-portage/layman:cvs - Support dev-vcs/cvs based overlays
app-portage/layman:darcs - Support dev-vcs/darcs based overlays
app-portage/layman:g-sorcery - Support app-portage/g-sorcery based overlays
app-portage/layman:git - Support dev-vcs/git based overlays
app-portage/layman:gpg - Support app-crypt/gnupg signed overlays lists and manifests
app-portage/layman:mercurial - Support dev-vcs/mercurial based overlays
app-portage/layman:squashfs - Support mounting squashfs image overlays locally read-only
app-portage/layman:subversion - Support dev-vcs/subversion based overlays
app-portage/layman:sync-plugin-portage - Install the sys-apps/portage sync module
app-portage/pfl:network-cron - Adds a cron job which does a weekly submit of the package database
app-portage/tatt:templates - Install template scripts to be used with tatt
app-shells/autojump:ipython - Add support for dev-python/ipython
app-shells/bash:bashlogger - Log ALL commands typed into bash; should ONLY be used in restricted environments such as honeypots
app-shells/bash:mem-scramble - Build with custom malloc/free overwriting allocated/freed memory
app-shells/bash:net - Enable /dev/tcp/host/port redirection
app-shells/bash:plugins - Add support for loading builtins at runtime via 'enable'
app-shells/dash:vanilla - Support echo -n, and enable echo -e all the time (unsupported)
app-shells/pdsh:rsh - This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.
app-text/asciidoc:highlight - Enable source code highlighting
app-text/atril:caja - Enable property page extension in mate-base/caja
app-text/atril:dvi - Enable build-in DVI viewer
app-text/atril:epub - Enable build-in DVI viewer using net-libs/webkit-gtk
app-text/atril:t1lib - Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)
app-text/atril:xps - Enable XPS viewer using app-text/libgxps
app-text/cb2bib:webengine - Use dev-qt/qtwebengine instead of dev-qt/qtwebkit
app-text/dbacl:interactive - Enable the interactive mailinspect ability
app-text/dblatex:inkscape - Use inkscape to convert SVG. Disable to use gnome-base/librsvg instead.
app-text/dictd:judy - Build Judy-based (dev-libs/judy) plugin implementing fast "exact" and especially "lev" strategies
app-text/dictd:minimal - Don't build server but dict client, dictzip and dictfmt only.
app-text/docbook-sgml-utils:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/docbook-xsl-ns-stylesheets:ruby - Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.
app-text/docbook-xsl-stylesheets:ruby - Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.
app-text/ebook-tools:lit2epub - Install lit2epub script
app-text/editorconfig-core-c:cli - Install command line interface.
app-text/enchant:aspell - Adds support for app-text/aspell spell checker
app-text/enchant:hunspell - Adds support for app-text/hunspell spell checker
app-text/evince:dvi - Enable the built-in DVI viewer
app-text/evince:nautilus - Enable property page extension in gnome-base/nautilus
app-text/evince:postscript - Enable support for PostScript and Adobe Illustrator documents with app-text/libspectre
app-text/evince:t1lib - Enable the Type-1 fonts for the built-in DVI viewer (media-libs/t1lib)
app-text/evince:xps - Enable XPS viewer using app-text/libgxps
app-text/ghostscript-gpl:unicode - Add support for unicode passwords via net-dns/libidn
app-text/gtranslator:gnome-dictionary - Enable plugin for dictionary lookups using app-dicts/gnome-dictionary.
app-text/gtranslator:gucharmap - Enable plugin for unicode symbols selection using gnome-extra/gucharmap.
app-text/hyperestraier:mecab - Enable app-text/mecab support for Estraier
app-text/kbibtex:webengine - Use dev-qt/qtwebengine for HTML previews
app-text/kbibtex:webkit - Use dev-qt/qtwebkit for HTML previews
app-text/kbibtex:zotero - Enable support for synchronisation with zotero.org web service
app-text/lcdf-typetools:kpathsea - Enable integration with kpathsea search library (TeX related)
app-text/libebook:tools - Build file conversion tools
app-text/libmwaw:tools - Build file conversion tools
app-text/libqxp:tools - Build file conversion tools
app-text/libstaroffice:tools - Build conversion tools
app-text/libstaroffice:zlib - Enable support for compressed data
app-text/libwpd:tools - Build file conversion tools
app-text/libwps:tools - Build file conversion tools
app-text/mathtex:png - Generate png images by default instead of gif
app-text/mupdf:openssl - Use dev-libs/openssl crypto backend
app-text/pandoc:embed_data_files - Embed data files in binary for relocatable executable.
app-text/pandoc:http-conduit - Enable downloading of resources over https.
app-text/pandoc:https - Enable support for downloading of resources over https.
app-text/pandoc:make-pandoc-man-pages - Build program to regenerate pandoc man pages from README.
app-text/pandoc:network-uri - Get Network.URI from the network-uri package.
app-text/pandoc:trypandoc - Build trypandoc cgi executable.
app-text/pandoc:weigh-pandoc - Build weigh-pandoc to measure memory usage.
app-text/pastebinit:crypt - Install pbputs for gpg-encrypted pastes
app-text/pdfgrep:unac - Removing accents and ligatures before search
app-text/pelican:markdown - Markdown support
app-text/podofo:boost - Add support for boost
app-text/podofo:tools - Build and install commandline tools.
app-text/poppler:nss - Enable signatures handling with dev-libs/nss
app-text/poppler:utils - Install command-line PDF converters and various utilities.
app-text/qpdf:perl - Install fix-qdf tool (for reverting PDF edits) written in perl
app-text/qpdfview:fitz - Use experimental fitz rendering, provided by app-text/mupdf, instead of poppler
app-text/qpdfview:synctex - Add support for searching TeX sources
app-text/sdcv:darkterm - Improve readability of color output on terminals with dark background.
app-text/sgmltools-lite:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/stardict:advertisement - Enable stardict advertisements plugin
app-text/stardict:cal - Enable calendar support using cal program
app-text/stardict:dictdotcn - Enable dict.cn network plugin (for Chinese language)
app-text/stardict:espeak - Enable text to speech synthesizer plugin using app-accessibility/espeak engine
app-text/stardict:flite - Enable text to speech synthesizer plugin using app-accessibility/flite engine
app-text/stardict:fortune - Enable plugin to read fortune messages using games-misc/fortune-mod. You may consider installing games-misc/fortune-mod-all to get all fortune messages.
app-text/stardict:gucharmap - Enable plugin for unicode symbols description using gnome-extra/gucharmap
app-text/stardict:htmlparse - Enable plugin to parse dictionaries with html content
app-text/stardict:info - Enable plugin to read info pages
app-text/stardict:man - Enable plugin to read manual pages
app-text/stardict:powerwordparse - Enable plugin to parse powerword dictionaries
app-text/stardict:pronounce - Install WyabdcRealPeopleTTS package (it is just many .wav files) to make StarDict pronounce English words
app-text/stardict:qqwry - Enable QQWry plugin, which provides information (in Chinese language) about geographical positions, owner, etc. for IP addresses
app-text/stardict:tools - Build and install dictionary management tools and converters from various dictionary formats
app-text/stardict:updateinfo - Enable plugin to check for stardict updates
app-text/stardict:wikiparse - Enable plugin to parse dictionaries in wikimedia format
app-text/stardict:wordnet - Enable wordnet plugin to find similar English words using lexical database
app-text/stardict:xdxfparse - Enable plugin to parse dictionaries in xdxf (XML Dictionary eXchange Format)
app-text/stardict:youdaodict - Enable youdao.com network plugin (for Chinese language)
app-text/sword:clucene - Use dev-cpp/clucene for lucene search support
app-text/tesseract:math - Enable support for recognition of equations.
app-text/tesseract:opencl - Enable opencl support for speedup using GPU computation.
app-text/tesseract:osd - Enable support orientation and script detection.
app-text/tesseract:scrollview - Install viewer to debug recognition (ScrollView).
app-text/tesseract:training - Install training applications to add support for new languages.
app-text/texlive:context - Add support for the ConTeXt format (dev-texlive/texlive-context)
app-text/texlive:detex - Add support for dev-tex/detex, a filter program that removes the LaTeX (or TeX) control sequences
app-text/texlive:dvi2tty - Add support for dev-tex/dvi2tty to preview dvi-files on text-only devices
app-text/texlive:epspdf - Add support for app-text/epspdf, a tool for converting [e]ps files to pdf
app-text/texlive:extra - Add support for extra TeXLive packages
app-text/texlive:games - Add typesetting support for games (chess, etc.) (dev-texlive/texlive-games)
app-text/texlive:graphics - Add support for several graphics packages (pgf, tikz,...)
app-text/texlive:humanities - Add LaTeX support for the humanities (dev-texlive/texlive-humanities)
app-text/texlive:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/texlive:luatex - Add extra support for luatex
app-text/texlive:metapost - Add support for metapost: A tool for creating graphics in scalable PostScript
app-text/texlive:music - Add support for music typesetting (dev-texlive/texlive-music)
app-text/texlive:pdfannotextractor - Add dev-tex/pdfannotextractor support, for extracting annotations from PDF files
app-text/texlive:pstricks - Add pstricks packages (dev-texlive/texlive-pstricks)
app-text/texlive:publishers - Add support for publishers (dev-texlive/texlive-publishers)
app-text/texlive:science - Add typesetting support for natural and computer sciences (dev-texlive/texlive-mathscience)
app-text/texlive:tex4ht - Add support for dev-tex/tex4ht (for converting (La)TeX to (X)HTML, XML and OO.org)
app-text/texlive:texi2html - Add support for app-text/texi2html which converts texi files to HTML
app-text/texlive:xetex - Add support for XeTeX macros (dev-texlive/texlive-xetex)
app-text/texlive:xindy - Add support for app-text/xindy, a flexible indexing system
app-text/texlive-core:luajittex - Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.
app-text/texlive-core:xetex - Add support for XeTeX: a TeX system with Unicode and modern font technologies.
app-text/wdiff:experimental - Build experimental utilities (mdiff, unify, wdiff2)
app-text/wklej:vim - Install the vim plugin allowing to paste through ':Wklej'.
app-text/writerperfect:abiword - Add support for abiword format using app-text/libabw
app-text/writerperfect:ebook - Add support for various ebook formats using app-text/libebook
app-text/writerperfect:freehand - Add support for freehand format using media-libs/libfreehand
app-text/writerperfect:gsf - Add support for structured files using gnome-extra/libgsf
app-text/writerperfect:keynote - Add support for keynote format using app-text/libetonyek
app-text/writerperfect:mspub - Add support to mspub format using app-text/libmspub
app-text/writerperfect:mwaw - Add support to mwaw formats using app-text/libmwaw
app-text/writerperfect:pagemaker - Add support to pagemaker formats using media-libs/libpagemaker
app-text/writerperfect:visio - Add support for visio format using media-libs/libvisio
app-text/writerperfect:wpd - Add support for wpd format using app-text/libwpd
app-text/writerperfect:wpg - Add support for wpg format using app-text/libwpg
app-text/writerperfect:wps - Add support for wps format using app-text/libwps
app-text/wv:tools - Install optional utilities considered deprecated in favor of using AbiWord.
app-text/xmlto:text - Support conversion from XML to plain text
app-text/zathura:magic - Use libmagic to determine mimetypes
app-text/zathura:synctex - Use libsynctex to get latex codeline from pdf
app-text/zathura-meta:cb - Install plug-in for ComicBook support
app-vim/gentoo-syntax:ignore-glep31 - Remove GLEP 31 (UTF-8 file encodings) settings
app-xemacs/xemacs-packages-all:mule - Add multi-language support to XEmacs
dev-ada/asis:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/asis:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/asis:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/aunit:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/aunit:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/aunit:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/aws:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/aws:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/aws:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gnat_util:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnat_util:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnat_util:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gnat_util:shared - Build gnat_util shared library
dev-ada/gnat_util:static-pic - Build gnat_util static library with pic code
dev-ada/gnatcoll:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnatcoll:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnatcoll:projects - Adds support for projects
dev-ada/gnatcoll:pygobject - Adds support for pygobject
dev-ada/gnatcoll:shared - Build shared library
dev-ada/gnatcoll:tools - Build associated tools
dev-ada/gnatcoll-bindings:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnatcoll-bindings:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnatcoll-bindings:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gnatcoll-bindings:shared - Build shared library
dev-ada/gnatcoll-bindings:static-pic - Build shared library
dev-ada/gnatcoll-core:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnatcoll-core:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnatcoll-core:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gnatcoll-core:shared - Build shared library
dev-ada/gnatcoll-core:static-pic - Build static library with pic code
dev-ada/gnatcoll-db:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnatcoll-db:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnatcoll-db:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gnatcoll-db:gnatcoll_db2ada - Build gnatcoll_db2ada
dev-ada/gnatcoll-db:gnatinspect - Build gnatinspect
dev-ada/gnatcoll-db:shared - Build shared library
dev-ada/gnatcoll-db:sql - Build sql library
dev-ada/gnatcoll-db:static-pic - Build shared library
dev-ada/gnatcoll-db:xref - Build xref library
dev-ada/gnatmem:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnatmem:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnatmem:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gprbuild:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gprbuild:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gprbuild:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gps:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gps:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gps:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gtkada:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gtkada:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gtkada:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/gtkada:shared - Build gtkada as shared library
dev-ada/libadalang:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/libadalang:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/libadalang:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/libadalang:shared - Build shared library
dev-ada/libgpr:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/libgpr:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/libgpr:gnat_2018 - Compile with dev-lang/gnat-gpl-2018
dev-ada/libgpr:shared - Build shared library
dev-ada/libgpr:static-pic - Build static library with pic code
dev-ada/xmlada:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/xmlada:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/xmlada:gnat_2018 - Compile with dev-lang/gnat-gpl-2017
dev-ada/xmlada:shared - Build shared library
dev-ada/xmlada:static-pic - Build static library with pic code
dev-cpp/eigen:c++11 - Build using the C++11 standard
dev-cpp/eigen:cuda - Build with cuda support
dev-cpp/glog:gflags - Use dev-cpp/gflags for flag parsing
dev-cpp/glog:unwind - Use sys-libs/libunwind for stack unwinding instead of glibc/gcc (may be more reliable on x86_64)
dev-cpp/libcmis:man - Build and install man pages.
dev-db/mariadb:backup - Build mariadb-backup which supports SST and hot backup of InnoDB, Aria and MyISAM including compression and encryption
dev-db/mariadb:client-libs - Build the client libraries from the server package instead of the C Connector packages
dev-db/mariadb:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mariadb:galera - Enables galera replication
dev-db/mariadb:innodb-lz4 - Enables lz4 compression methods for InnoDB/XtraDB
dev-db/mariadb:innodb-lzo - Enables lzo compression methods for InnoDB/XtraDB
dev-db/mariadb:innodb-snappy - Enables snappy compression methods for InnoDB/XtraDB using app-arch/snappy
dev-db/mariadb:jdbc - Enable the CONNECT engine to access foreign databases via JDBC
dev-db/mariadb:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mariadb:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/mariadb:mroonga - Add support for the Mroonga engine for interfacing with the Groonga text search
dev-db/mariadb:numa - Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)
dev-db/mariadb:oqgraph - Add support for the Open Query GRAPH engine
dev-db/mariadb:pam - Enable the optional PAM authentication plugin for the server
dev-db/mariadb:profiling - Add support for statement profiling (requires USE=community).
dev-db/mariadb:rocksdb - Add support for RocksDB; a key/value, LSM database optimized for flash storage
dev-db/mariadb:server - Build the server program
dev-db/mariadb:sphinx - Add suport for the sphinx full-text search engine
dev-db/mariadb:sst-mariabackup - Add tools needed to support the mariabackup SST method
dev-db/mariadb:sst-rsync - Add tools needed to support the rsync SST method
dev-db/mariadb:sst-xtrabackup - Add tools needed to support the xtrabackup and xtrabackup-v2 SST methods
dev-db/mariadb:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mariadb:test - Install upstream testsuites for end use.
dev-db/mariadb:tokudb - Add support for TokuDB storage engine
dev-db/mariadb:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/mariadb-connector-c:mysqlcompat - Enable mysqlclient library symbolic links
dev-db/mongodb:mms-agent - Install the MongoDB Monitoring Service agent
dev-db/mongodb:tools - Install the MongoDB tools (mongoimport, mongodump...) from app-admin/mongo-tools
dev-db/mysql:cjk - Add CJK support for InnoDB fulltext search using app-text/mecab
dev-db/mysql:client-libs - Build the client libraries from the server package instead of the C Connector packages (not recommended)
dev-db/mysql:experimental - Build experimental features aka "rapid" plugins
dev-db/mysql:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mysql:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mysql:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/mysql:numa - Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)
dev-db/mysql:profiling - Add support for statement profiling (requires USE=community).
dev-db/mysql:server - Build the server program
dev-db/mysql:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mysql:test - Install upstream testsuites for end use.
dev-db/mysql:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/mysql-connector-c++:gcov - Build coverage support
dev-db/mysql-connector-c++:legacy - Build the legacy 1.x API as well as the DevX API
dev-db/pgbouncer:c-ares - Use c-ares as the DNS backend instead of evdns (libevent).
dev-db/pgbouncer:udns - Use udns as the DNS backend instead of evdns (libevent). Supports IPv4 only.
dev-db/pgpool2:memcached - Use memcached for query caching.
dev-db/phpmyadmin:setup - Installs the phpMyAdmin setup utility. Users who don't use the utility should disable this USE flag for security reasons as the setup tool was the target of various exploits in the past.
dev-db/postgis:address-standardizer - Normalize US and CA postal addresses
dev-db/postgis:gtk - Build graphical interface for shp2pgsql (shp2pgsql-gui)
dev-db/postgis:mapbox - Add capability to transform geometry into Mapbox Vector Tile
dev-db/postgis:topology - Build topology spatial types and functions
dev-db/postgresql:llvm - Add support for llvm JIT engine
dev-db/postgresql:pg_legacytimestamp - Use double precision floating-point numbers instead of 64-bit integers for timestamp storage.
dev-db/postgresql:server - Disable to build and install the clients and libraries only.
dev-db/postgresql:uuid - Enable server side UUID generation (via dev-libs/ossp-uuid).
dev-db/psqlodbc:iodbc - Use dev-db/libiodbc. Disable to use dev-db/unixODBC.
dev-db/redis:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations.
dev-db/spatialite:geos - Add the sci-libs/geos library for exact topological tests
dev-db/spatialite:proj - Add the sci-libs/proj library for reprojection features
dev-db/spatialite:xls - Add the dev-libs/freexl library for xls import support
dev-db/sqldeveloper:sybase - Add support for the Sybase SQL Database Server
dev-db/sqlite:secure-delete - Enable overwriting of deleted content with zeros by default (http://sqlite.org/pragma.html#pragma_secure_delete), causing some performance penalty
dev-db/sqlite:tools - Install additional tools
dev-db/unixODBC:minimal - Disable bundled drivers and extra libraries (most users don't need these)
dev-db/unixODBC:odbcmanual - Administrator, Internal Structure, Programmer and User documentation
dev-embedded/avrdude:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-embedded/libftdi:tools - build ftdi_eeprom helper tool
dev-embedded/openocd:cmsis-dap - Support for CMSIS-DAP compliant adapters
dev-embedded/openocd:dummy - Build the dummy port driver
dev-embedded/openocd:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-embedded/openocd:jlink - Build the SEGGER J-Link driver
dev-embedded/openocd:parport - Enable support for parport JTAG devices
dev-embedded/openocd:verbose-io - Verbose IO and comm JTAG and USB messages
dev-embedded/sdcc:avr - Add support for AVR -- not supported upstream
dev-embedded/sdcc:boehm-gc - Enable Hans Boehm's garbage collector dev-libs/boehm-gc
dev-embedded/sdcc:device-lib - Enable built of devices libraries
dev-embedded/sdcc:ds390 - Add support for Dallas DS390
dev-embedded/sdcc:ds400 - Add support for Dallas DS400
dev-embedded/sdcc:gbz80 - Add support for Gameboy gbz80
dev-embedded/sdcc:hc08 - Add support for Freescale/Motorola HC08 based
dev-embedded/sdcc:mcs51 - Add support for Intel mcs51
dev-embedded/sdcc:non-free - Enable non-free runtime library parts
dev-embedded/sdcc:packihx - Enable Intel HEX files pack utility
dev-embedded/sdcc:pic14 - Add support for Microchip 14 bits PICs
dev-embedded/sdcc:pic16 - Add support for Microchip 16 bits PICs
dev-embedded/sdcc:r2k - Add support for Rabbit 2000
dev-embedded/sdcc:r3ka - Add support for Rabbit 3000A
dev-embedded/sdcc:s08 - Add support for Freescale/Motorola S08
dev-embedded/sdcc:sdbinutils - Enable SDCC library archive utilities sdar, sdranlib, sdnm
dev-embedded/sdcc:sdcdb - Enable SDCC source level debugger
dev-embedded/sdcc:sdcpp - Enable SDCC preprocessor based on GCC cpp
dev-embedded/sdcc:stm8 - Add support for STMicroelectronics STM8
dev-embedded/sdcc:tlcs90 - Add support for TLCS-90
dev-embedded/sdcc:ucsim - Enable software simulator for microcontrollers
dev-embedded/sdcc:z180 - Add support for Zilog Z180
dev-embedded/sdcc:z80 - Add support for Zilog Z80
dev-embedded/urjtag:ftd2xx - Enable support for USB FTDI chips via dev-embedded/libftd2xx
dev-embedded/urjtag:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-games/aseprite:bundled-libs - Use the upstream provided bundled version of allegro 4.4.2
dev-games/aseprite:gtk3 - Enable support for the experimental native GTK File Dialog
dev-games/cegui:devil - Build the DevIL based ImageCodec module
dev-games/cegui:freeimage - Build the FreeImage based ImageCodec module
dev-games/cegui:irrlicht - Enable the Irrlicht renderer
dev-games/cegui:ogre - Enable the OGRE renderer
dev-games/cegui:tinyxml - Enable the Tiny XML parser module
dev-games/cegui:xerces-c - Enable the Xerces-C++ XML parser module
dev-games/cegui:zip - Enable the Minizip resource provider
dev-games/guichan:allegro - Build the Allegro frontend
dev-games/mygui:l10n_ru - Install some additional russian docs if 'doc' useflag enabled
dev-games/mygui:ogre - Use the ogre render subsystem. (cannot combine with opengl)
dev-games/mygui:opengl - Use the opengl render subsystem. (cannot combine with ogre)
dev-games/mygui:plugins - Build MyGUI plugins
dev-games/mygui:samples - Install MyGUI demos (needs ogre USE flag)
dev-games/mygui:tools - Build the tools for development
dev-games/ode:double-precision - more precise calculations at the expense of speed
dev-games/ode:gyroscopic - enable gyroscopic term (may cause instability)
dev-games/ogre:boost - Enable boost support
dev-games/ogre:cache - Enable GL state cache support
dev-games/ogre:cg - NVIDIA toolkit plugin
dev-games/ogre:double-precision - More precise calculations at the expense of speed
dev-games/ogre:egl - Use egl instead of glx
dev-games/ogre:experimental - Build experimental BETA component 'HLMS'
dev-games/ogre:freeimage - Support images via media-libs/freeimage
dev-games/ogre:gl3plus - Build OpenGL 3+ RenderSystem (EXPERIMENTAL)
dev-games/ogre:gles2 - Build OpenGL ES 2.x RenderSystem
dev-games/ogre:gles3 - Enable OpenGL ES 3.x Features
dev-games/ogre:json - Use dev-libs/rapidjson (needed by Hlms JSON materials)
dev-games/ogre:legacy-animations - Use the skeletal animation from 1.x. It's much slower, but the new system is still experimental.
dev-games/ogre:mobile - Build for OpenGL ES 2.0 only and use the mobile variants of the PBS and unlit material systems.
dev-games/ogre:ois - Pull in Object-oriented Input System library dev-games/ois for samples
dev-games/ogre:poco - When USE=threads, use poco for threading
dev-games/ogre:resman-pedantic - Resource Manager PEDANTIC : require an explicit resource group. Case sensitive lookup. Some demos might not work with this setting. (default: case-insensitive + sensitive lookup in all groups)
dev-games/ogre:resman-strict - Resource Manager STRICT : search in default group if not specified otherwise. Case sensitive lookup. Some demos might not work with this setting. (default: case-insensitive + sensitive lookup in all groups)
dev-games/ogre:tbb - When USE=threads, use tbb for threading
dev-games/ogre:tools - Build and install helper tools
dev-games/openscenegraph:asio - Enable support for dev-cpp/asio library
dev-games/openscenegraph:fox - Build examples using x11-libs/fox library
dev-games/openscenegraph:gdal - Enable support for sci-libs/gdal library
dev-games/openscenegraph:las - Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas
dev-games/openscenegraph:openinventor - Build OpenInventor plugin
dev-games/openscenegraph:osgapps - Build osg applications
dev-games/openscenegraph:sdl2 - Use media-libs/libsdl2 additionally to media-libs/libsdl
dev-games/openscenegraph:xrandr - Enable support for the X xrandr extension
dev-games/physfs:7zip - Enable 7zip/lzma archive support
dev-games/physfs:grp - Enable Build Engine GRP archive support
dev-games/physfs:hog - Enable Descent I/II HOG archive support
dev-games/physfs:iso - Enable ISO9660 file support
dev-games/physfs:mvl - Enable Descent I/II MVL archive support
dev-games/physfs:qpak - Enable Quake I/II QPAK archive support
dev-games/physfs:slb - Enable Independence War SLB archive support
dev-games/physfs:vdf - Enable Gothic/Gothic II VDF archive support
dev-games/physfs:wad - Enable Doom WAD archive support
dev-haskell/aeson-pretty:lib-only - don't build 'aeson-pretty' executable.
dev-haskell/ansi-terminal:example - Build the example application.
dev-haskell/ansi-wl-pprint:example - Build the example application.
dev-haskell/bifunctors:semigroups - You can disable the use of the `semigroups` package using `-f-semigroups`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/bifunctors:tagged - You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/blaze-builder-enumerator:newbuilder - use bytestring-builder instead of blaze-builder-0.3
dev-haskell/c2hs:regression - run regression tests
dev-haskell/cabal-install:network-uri - Get Network.URI from the network-uri package.
dev-haskell/cabal-install:noprefs - Ignore 'preferred-versions' file from hackage's tarball.
dev-haskell/certificate:executable - Build the executable
dev-haskell/cgi:extensible-exceptions-in-base - Required to be enabled for >=dev-lang/ghc-7.
dev-haskell/cgi:network-uri - Get Network.URI from the network-uri package.
dev-haskell/chell:color-output - use colors in program output
dev-haskell/cmark:system-cmark - use app-text/cmark instead of bundled copy
dev-haskell/cmdargs:quotation - Build quote module
dev-haskell/cmdargs:testprog - Build the test program
dev-haskell/comonad:containers - You can disable the use of the `containers` package using `-f-containers`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/comonad:contravariant - You can disable the use of the `contravariant` package using `-f-contravariant`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Contravariant`
dev-haskell/comonad:distributive - You can disable the use of the `distributive` package using `-f-distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive`
dev-haskell/comonad:test-doctests - Run the doctests test suite
dev-haskell/conduit:nohandles - experimental code to use raw system calls in place of handles. Not recommended for general use
dev-haskell/contravariant:safe - Get Safe guarantees rather than merely Trustworthy, but with worse constant factors.
dev-haskell/contravariant:semigroups - You can disable the use of the `semigroups` package using `-f-semigroups`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/contravariant:statevar - You can disable the use of the `StateVar` package using `-f-StateVar`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/contravariant:tagged - You can disable the use of the `tagged` package on older versons of GHC using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/crypto-api:all_cpolys - Build all the CMAC polynomes up to 10000 bits instead of just the usual ones
dev-haskell/cryptohash:cryptoapi - Defines crypto-api instances
dev-haskell/cryptonite:integer-gmp - Whether or not to use GMP for some functions
dev-haskell/cryptonite:support_aesni - allow compilation with AESNI on system and architecture that supports it
dev-haskell/cryptonite:support_blake2_sse - Use SSE optimized version of BLAKE2
dev-haskell/cryptonite:support_deepseq - add deepseq instances for cryptographic types
dev-haskell/cryptonite:support_pclmuldq - Allow compilation with pclmuldq on architecture that supports it
dev-haskell/cryptonite:support_rdrand - allow compilation with AESNI on system and architecture that supports it
dev-haskell/distributive:lib-werror - Compile with the ghc -Werror option
dev-haskell/encoding:systemencoding - Provide the getSystemEncoding action to query the locale.
dev-haskell/entropy:halvm - Build for the HaLVM.
dev-haskell/glib:closure_signals - Use the the GClosure-based signals implementation.
dev-haskell/gtk:deprecated - Include definitions in this library that are considered obsolete.
dev-haskell/gtk:fmode-binary - Set the default file translation mode for file I/O operations to _O_BINARY.
dev-haskell/gtk:gio - Depend on GIO package, thereby enabling certain features.
dev-haskell/gtk2hs-buildtools:closuresignals - Use the the GClosure-based signals implementation.
dev-haskell/gtk3:fmode-binary - Set the default file translation mode for file I/O operations to _O_BINARY.
dev-haskell/gtk3:gio - Depend on GIO package, thereby enabling certain features.
dev-haskell/hackage-security:use-network-uri - Get Network.URI from the network-uri package.
dev-haskell/hashed-storage:diff - Provide the Storage.Hashed.Diff module.
dev-haskell/hashed-storage:hpc - Compile with the profiling ghc flag -fhpc.
dev-haskell/hashtables:bounds-checking - if on, use bounds-checking array accesses
dev-haskell/hashtables:portable - if on, use only pure Haskell code and no GHC extensions.
dev-haskell/hashtables:unsafe-tricks - turn on unsafe GHC tricks
dev-haskell/haskeline:legacy-encoding - Use legacy iconv encoding for POSIX. This is only intended for testing.
dev-haskell/haskeline:libiconv - Explicitly link against the libiconv library.
dev-haskell/haskeline:terminfo - Use the terminfo package for POSIX consoles.
dev-haskell/hexpat:bundled-expat - Use bundled expat instead of dev-libs/expat
dev-haskell/highlighting-kate:executable - Build the Highlight executable.
dev-haskell/highlighting-kate:pcre-light - Use the pcre-light library instead of regex-pcre-builtin.
dev-haskell/hlint:gpl - Use GPL libraries, specifically hscolour.
dev-haskell/hslogger:buildtests - Build the executable to run unit tests.
dev-haskell/hslua:apicheck - Compile Lua with -DLUA_USE_APICHECK..
dev-haskell/hslua:system-lua - Use the system-wide lua instead of the bundled copy.
dev-haskell/hsopenssl:fast-bignum - Enable fast moving of bignums between OpenSSL and GMP (GHC Only)
dev-haskell/http:conduit10 - Use version 1.0.x or below of the conduit package (for the test suite).
dev-haskell/http:network-uri - Get Network.URI from the network-uri package.
dev-haskell/http-client:network-uri - Get Network.URI from the network-uri package.
dev-haskell/http-streams:network-uri - Get Network.URI from the network-uri package.
dev-haskell/httpd-shed:buildexamples - Build example executables.
dev-haskell/httpd-shed:network-uri - Get Network.URI from the network-uri package.
dev-haskell/hxt:network-uri - Get Network.URI from the network-uri package.
dev-haskell/json:generic - Add support for generic encoder (dev-haskell/syb)
dev-haskell/json:mapdict - Encode Haskell maps as JSON dicts
dev-haskell/json:parsec - Add support for parsing with Parsec
dev-haskell/json:pretty - Add support for using pretty printing combinators
dev-haskell/lens:benchmark-uniplate - Enable benchmarking against Neil Mitchell's uniplate library for comparative performance analysis. Defaults to being turned off to avoid the extra dependency.
dev-haskell/lens:dump-splices - Build and run the doctests test-suite.
dev-haskell/lens:inlining - Generate inline pragmas when using template-haskell. This defaults to enabled, but you can to shut it off to benchmark the relative performance impact, or as last ditch effort to address compile errors resulting from the myriad versions of template-haskell that all purport to be 2.8.
dev-haskell/lens:j - Attempt a parallel build with GHC 7.8.
dev-haskell/lens:lib-werror - Turn on ghc-options: -Werror
dev-haskell/lens:old-inline-pragmas - Some 7.6.1-rc1 users report their TH still uses old style inline pragmas. This lets them turn on inlining.
dev-haskell/lens:safe - Disallow unsafeCoerce
dev-haskell/lens:test-doctests - Build and run the doctests test-suite.
dev-haskell/lens:test-hlint - You can disable the hlint test suite with -f-test-hlint
dev-haskell/lens:test-hunit - You can disable the hunit test suite with -f-test-hunit
dev-haskell/lens:test-properties - Build the properties test if we're building tests
dev-haskell/lens:test-templates - Build the test templates if we're building tests
dev-haskell/lens:trustworthy - Assert that we are trustworthy when we can
dev-haskell/lifted-async:monad-control-1 - Use moand-control == 1.*
dev-haskell/monad-control:instancest - If enabled this package will export MonadBaseControl instances for the lazy and strict ST monad. If disabled these instances are only exported when base >= 4.4. If enabled it is required that the transformer-base package exports MonadBase instances for ST. It will do this by default.
dev-haskell/nats:hashable - You can disable the use of the `hashable` package using USE=-hashable. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If set we will not supply an instance of `Hashable`.
dev-haskell/pandoc-citeproc:bibutils - use Chris Putnam's app-text/bibutils
dev-haskell/pandoc-citeproc:embed_data_files - Embed locale files into the library (needed for windows packaging)
dev-haskell/pandoc-citeproc:hexpat - use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
dev-haskell/pandoc-citeproc:network - use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
dev-haskell/pandoc-citeproc:small_base - Choose the new smaller, split-up base package.
dev-haskell/pandoc-citeproc:test_citeproc - Build the test-citeproc program
dev-haskell/pandoc-citeproc:unicode_collation - Use Haskell bindings to the dev-libs/icu
dev-haskell/publicsuffixlist:create - export Network.PublicSuffixList.Create module
dev-haskell/publicsuffixlist:runtimelist - read suffix list from dist at startup instead of embedding list into library
dev-haskell/quickcheck:template_haskell - Enable additional test modules requiring Template Haskell support.
dev-haskell/reflection:template-haskell - Enable template haskell.
dev-haskell/rfc5051:mkunicodedata - build codes generator itself
dev-haskell/sandi:with-conduit - Build with conduit
dev-haskell/scientific:bytestring-builder - Provide the Data.ByteString.Builder.Scientific module (requires bytestring >= 0.10).
dev-haskell/semigroupoids:comonad - You can disable the use of the `comonad` package using `-f-comonad`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Comonad`
dev-haskell/semigroupoids:containers - You can disable the use of the `containers` package using `-f-containers`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroupoids:contravariant - You can disable the use of the `contravariant` package using `-f-contravariant`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Contravariant`
dev-haskell/semigroupoids:distributive - You can disable the use of the `distributive` package using `-f-distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive`
dev-haskell/semigroupoids:tagged - You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:binary - provide instances for binary package
dev-haskell/semigroups:bytestring - You can disable the use of the `bytestring` package using USE=-bytestring. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:containers - You can disable the use of the `containers` package using USE=-containers. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:deepseq - You can disable the use of the `deepseq` package using `-f-deepseq`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:hashable - You can disable the use of the `hashable` package using USE=-hashable. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If set we will not supply an instance of `Hashable`.
dev-haskell/semigroups:text - You can disable the use of the `text` package using USE=-text. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:transformers - provide instances for transformers package.
dev-haskell/semigroups:unordered-containers - You can disable the use of the `unordered-containers` package using USE=-unordered-containers. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/sha:exe - Build a sha1 and a sha384 executable similar to 'md5sum'.
dev-haskell/shelly:lifted - run the tests against Shelly.Lifted
dev-haskell/simple-sendfile:allow-bsd - Allow use of BSD sendfile (disable on GNU/kFreeBSD)
dev-haskell/skylighting:executable - Build the skylighting executable.
dev-haskell/snap-core:portable - No non-haskell unportable code.
dev-haskell/snap-server:build-pong - Build a server that just returns "PONG"
dev-haskell/snap-server:openssl - enable https support using dev-haskell/hsopenssl
dev-haskell/snap-server:portable - no non-haskell unportable code.
dev-haskell/tagsoup:download - Build with Download module.
dev-haskell/tagsoup:testprog - Build the test program.
dev-haskell/tasty:colors - Enable colorful output
dev-haskell/tasty-quickcheck:old-quickcheck - Use Quick-Check < 2.7.
dev-haskell/texmath:executable - Compile test executable.
dev-haskell/texmath:network-uri - Get Network.URI from the network-uri package.
dev-haskell/text:developer - operate in developer mode
dev-haskell/tls:compat - Accept SSLv2 compatible handshake.
dev-haskell/tls:network - Use the base network library.
dev-haskell/transformers-base:orphaninstances - Build instances for orphan datatypes.
dev-haskell/transformers-compat:three - Use transformers-0.3
dev-haskell/unix-compat:old-time - build against old-time package
dev-haskell/uuagc:with-loag - Use dev-haskell/minisat external SAT-solver to schedule all Linear Ordered AGs.
dev-haskell/vector:boundschecks - Enable bounds checking
dev-haskell/vector:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty
dev-haskell/vector:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty
dev-haskell/void:safe - dissable effective but unsafe coersions
dev-haskell/warp:allow-sendfilefd - Allow use of sendfileFd (not available on GNU/kFreeBSD).
dev-haskell/warp:warp-debug - Add additional debuging information
dev-haskell/x11:screensaver - whether to build XScreenSaver.
dev-haskell/x509-store:executable - Build the executable
dev-haskell/yaml:no-examples - don't build the examples
dev-haskell/yaml:no-exe - don't install the yaml2json executable
dev-haskell/yaml:no-unicode - Don't enable unicode output. Instead, unicode characters will be escaped.
dev-haskell/yaml:system-libyaml - Use system libyaml instead on generic one
dev-haskell/zip-archive:executable - Build the Zip executable.
dev-haskell/zlib:non-blocking-ffi - Execute FFI calls in the context of haskell thread.
dev-java/ant:antlr - Enable ANTLR Ant tasks
dev-java/ant:bcel - Enable bcel (bytecode manipulation) Ant tasks
dev-java/ant:bsf - Enable support for Apache Bean Scripting Framework (dev-java/bsf)
dev-java/ant:commonslogging - Enable commons-logging Ant tasks
dev-java/ant:commonsnet - Enable commons-net Ant tasks
dev-java/ant:jai - Enable JAI (Java Imaging) Ant task
dev-java/ant:javamail - Enable JavaMail Ant task
dev-java/ant:jdepend - Enable Jdepend Ant tasks
dev-java/ant:jmf - Enable JMF (Java Media Framework) Ant tasks
dev-java/ant:jsch - Disable Jsch (ssh, scp and related) Ant tasks
dev-java/ant:log4j - Enable Apache log4j Ant tasks
dev-java/ant:oro - Enable Apache Oro Ant tasks
dev-java/ant:regexp - Enable Apache Regexp Ant tasks
dev-java/ant:resolver - Enable Apache Resolver Ant tasks
dev-java/ant:testutil - Enable optional test util classes
dev-java/commons-collections:test-framework - Install the test framework
dev-java/commons-logging:avalon-framework - Add optional support for avalon-framework
dev-java/commons-logging:avalon-logkit - Add optional support for avalon-logkit
dev-java/commons-logging:log4j - Add optional support for log4j
dev-java/commons-logging:servletapi - Add optional support for servletapi
dev-java/eclipse-ecj:ant - Support using ecj in Ant builds via dev-java/ant-eclipse-ecj
dev-java/emma:launcher - Install /usr/bin/emma. Collides with sci-biology/emboss.
dev-java/gnu-classpath:alsa - Build with ALSA javax.sound.midi provider
dev-java/gnu-classpath:dssi - Build with DSSI javax.sound.midi provider
dev-java/gnu-classpath:gconf - Build with GConf preferences backend
dev-java/gnu-classpath:gjdoc - Build GJDoc, a documentation generator
dev-java/gnu-classpath:gmp - Build with GMP backend for java.math.BigInteger
dev-java/gnu-classpath:gtk - Build with Gtk+ AWT peers
dev-java/gnu-classpath:xml - Build with native XML backend
dev-java/icedtea-bin:headless-awt - Don't install the X backend for AWT, needed by some GUIs (used to be X flag)
dev-java/icedtea-bin:webstart - Provide javaws command through symlink to icedtea-web
dev-java/icedtea-web:javascript - Enable support for using proxy auto config (PAC) files.
dev-java/icedtea-web:nsplugin - Enable the browser plugin (NPPlugin).
dev-java/icedtea-web:tagsoup - Depend on dev-java/tagsoup which allows parsing malformed .jnlp files
dev-java/itext:rtf - Build and provide libraries for rich text format
dev-java/itext:rups - Build and provide GUI for Reading/Updating PDF Syntax
dev-java/jdbc-mysql:c3p0 - Enable c3p0 support
dev-java/jdbc-mysql:log4j - Enable log4 support
dev-java/jfreesvg:debug - Enable debugging during compilation.
dev-java/jna:awt - Enables support for Java AWT
dev-java/jna:nio-buffers - Enables support for NIO buffers
dev-java/log4j:javamail - Build the SMTPAppender
dev-java/log4j:jms - Build the JMSAppender
dev-java/logback:tomcat - Builds Apache Tomcat support
dev-java/lucene:contrib - Include extra functionality from contrib/
dev-java/miglayout:swt - Add support for the SWT toolkit.
dev-java/proguard:ant - Ant task for using ProGuard in build.xml scripts
dev-java/protobuf-java:nano - Enable code generator and runtime library designed specifically for resource-constrained systems, like Android
dev-java/rxtx:lfd - Installs and uses LockFileServer daemon (lfd)
dev-java/sbt:binary - Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.
dev-lang/erlang:compat-ethread - Enable compatibility with pre-pentium 4 CPUs in the ethread library.
dev-lang/erlang:dirty-schedulers - Enable dirty schedulers
dev-lang/erlang:hipe - HIgh Performance Erlang extension
dev-lang/erlang:kpoll - Enable kernel polling support
dev-lang/erlang:pgo - Build erts with profile-guided optimizations
dev-lang/fpc:ide - Build and install the Free Pascal Compiler IDE
dev-lang/ghc:binary - Install the binary version directly, rather than using it to build the source version.
dev-lang/ghc:ghcbootstrap - Internal: Bootstrap GHC from an existing GHC installation.
dev-lang/ghc:ghcmakebinary - Internal: Build binary friendly for redistribution.
dev-lang/gnat-gpl:awt - Useful only when building GCJ, this enables Abstract Window Toolkit (AWT) peer support on top of GTK+
dev-lang/gnat-gpl:cilk - Support the Cilk Plus language (C/C++ based languages for parallel programming)
dev-lang/gnat-gpl:fixed-point - Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
dev-lang/gnat-gpl:go - Build the GCC Go language frontend.
dev-lang/gnat-gpl:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation
dev-lang/gnat-gpl:libssp - Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)
dev-lang/gnat-gpl:mpx - Enable support for Intel Memory Protection Extensions (MPX)
dev-lang/gnat-gpl:nopie - Disable PIE support (NOT FOR GENERAL USE)
dev-lang/gnat-gpl:nossp - Disable SSP support (NOT FOR GENERAL USE)
dev-lang/gnat-gpl:objc - Build support for the Objective C code language
dev-lang/gnat-gpl:objc++ - Build support for the Objective C++ language
dev-lang/gnat-gpl:objc-gc - Build support for the Objective C code language Garbage Collector
dev-lang/gnat-gpl:pgo - Build GCC using Profile Guided Optimization (PGO)
dev-lang/gnat-gpl:regression-test - Run the testsuite and install the results (requires FEATURES=test)
dev-lang/gnat-gpl:sanitize - Build support for various sanitizer functions (ASAN/TSAN/etc...)
dev-lang/gnat-gpl:ssp - Build packages with stack smashing protector on by default
dev-lang/gnat-gpl:vtv - Build support for virtual table verification (a C++ hardening feature)
dev-lang/go:gccgo - Enable bootstrapping using gccgo
dev-lang/icon:iplsrc - install the icon programming library source
dev-lang/lazarus:minimal - Don't build extra packages from the bigide component
dev-lang/lua:deprecated - make deprecated data structures/routines available
dev-lang/luajit:lua52compat - Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code.
dev-lang/mercury:erlang - Support Mercury Erlang grade
dev-lang/mercury:trail - Support Mercury trail grades
dev-lang/mono:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
dev-lang/mono:xen - Make mono generate code that is considerably faster on xen VMs but slightly slower on for normal systems.
dev-lang/ocaml:flambda - Enables the Flambda optimizer: A new intermediate representation (introduced in ocaml 4.03) in the depths of the compiler designed to allow for better inlining.
dev-lang/ocaml:spacetime - Enables the Spacetime memory profiler. See https://caml.inria.fr/pub/docs/manual-ocaml/spacetime.html for more information.
dev-lang/orc:pax_kernel - Apply patch needed for pax enabled kernels.
dev-lang/perl:ithreads - Enable Perl threads, has some compatibility problems
dev-lang/php:argon2 - Enable password hashing algorithm from app-crypt/argon2
dev-lang/php:bcmath - Add support for libbcmath
dev-lang/php:cli - Enable CLI SAPI
dev-lang/php:coverage - Include gcov symbols for test coverage and lcov reports. Only useful for extension developers, and requires GCC.
dev-lang/php:ctype - Enable ctype functions
dev-lang/php:embed - Enable embed SAPI
dev-lang/php:enchant - Add supports Enchant spelling library.
dev-lang/php:fileinfo - Add fileinfo extension support
dev-lang/php:filter - Add filter extension support
dev-lang/php:flatfile - Add dbm support for flat files
dev-lang/php:fpm - Enable the FastCGI Process Manager SAPI
dev-lang/php:gd - Adds support for gd (bundled with PHP)
dev-lang/php:hash - Enable the hash extension
dev-lang/php:inifile - Add dbm support for .ini files
dev-lang/php:intl - Enables the intl extension for extended internalization support
dev-lang/php:json - Enable JSON support
dev-lang/php:ldap-sasl - Add SASL support for the PHP LDAP extension
dev-lang/php:libmysqlclient - Use libmyslclient driver for mysql, mysqli, PDO_Mysql (not recommended)
dev-lang/php:lmdb - Enable support for dev-db/lmdb db backend
dev-lang/php:opcache - Enables built-in opcode cache, replacing pecl-apc et al.
dev-lang/php:pcntl - Add support for process creation functions
dev-lang/php:pdo - Enable the bundled PDO extensions
dev-lang/php:phar - Enables the phar extension to provide phar archive support
dev-lang/php:phpdbg - Enable the PHP Debug Command Line SAPI (like gdb for php)
dev-lang/php:session-mm - Include dev-libs/mm support for session storage
dev-lang/php:sharedmem - Add support for shared memory use
dev-lang/php:simplexml - Support for SimpleXML
dev-lang/php:sodium - Enable support for crypto through dev-libs/libsodium
dev-lang/php:sybase-ct - Add support for Sybase-CT
dev-lang/php:sysvipc - Support for System V-compatible inter-process communication
dev-lang/php:tokenizer - Add support for the PHP file parser
dev-lang/php:tokyocabinet - Enable support for dev-db/tokyocabinet db backend
dev-lang/php:vpx - Enable webp support for GD in php-5.x
dev-lang/php:wddx - Add support for Web Distributed Data eXchange
dev-lang/php:webp - Enable webp support for GD in php-7.x
dev-lang/php:xmlreader - Enable XMLReader support
dev-lang/php:xmlwriter - Enable XMLWriter support
dev-lang/php:xslt - Enable the XSL extension
dev-lang/php:zip-encryption - Enable ZIP file encryption from dev-libs/libzip
dev-lang/python:bluetooth - Build Bluetooth protocol support in socket module
dev-lang/python:threads - Enable threading support. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING)
dev-lang/python:wide-unicode - Enable wide Unicode implementation which uses 4-byte Unicode characters. Switching of this USE flag changes ABI of Python and requires reinstallation of many Python modules. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING)
dev-lang/python:wininst - Install Windows executables required to create an executable installer for MS Windows.
dev-lang/qu-prolog:pedro - Pedro subscription/notification communications system
dev-lang/ruby:rdoc - Install dev-ruby/rdoc after installing Ruby.
dev-lang/ruby:readline - Use the sys-libs/readline library to provide the readline extension, used for instance by the irb tool. This flag is meaningful only if the libedit USE flag is disabled. If neither libedit nor readline USE flags are enabled, the readline extension will not be built (and irb will lose line editing functionality).
dev-lang/ruby:rubytests - Install ruby tests that can only be run after ruby is installed
dev-lang/rust:cargo - Install cargo component
dev-lang/rust:clippy - Install clippy component
dev-lang/rust:rls - Install rls component
dev-lang/rust:rustfmt - Install rustfmt component
dev-lang/rust:system-llvm - Use the system LLVM install
dev-lang/rust:wasm - Build support for the wasm32-unknown-unknown target
dev-lang/rust-bin:cargo - Install cargo component
dev-lang/rust-bin:clippy - Install clippy component
dev-lang/rust-bin:rustfmt - Install rustfmt component
dev-lang/scala:binary - Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.
dev-lang/spidermonkey:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
dev-lang/spidermonkey:debug - Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems
dev-lang/spidermonkey:system-icu - Use the system-wide dev-libs/icu instead of bundled -- note, only takes effect when icu flag is enabled
dev-lang/spidermonkey:threadsafe - Build a threadsafe version of spidermonkey
dev-lang/swi-prolog:archive - Use libarchive for extension packs
dev-lang/swi-prolog:uuid - Use ossp-uuid for UUID pack
dev-lang/swi-prolog:yaml - Use libyaml for YAML pack
dev-lang/swig:ccache - build ccache-swig(a fast compiler cache)
dev-lang/yap:R - Enable support for connecting R to Prolog
dev-libs/ace:ciao - Include Component Intergraced Ace ORB into the build of ace
dev-libs/ace:tao - Include the ACE ORB (CORBA stuff) (called tao) into the build of ace
dev-libs/appstream:apt - Enables Debians APT support
dev-libs/appstream-glib:stemmer - Add word stemming via dev-libs/snowball-stemmer.
dev-libs/apr:older-kernels-compatibility - Enable binary compatibility with older kernels
dev-libs/apr:urandom - Use /dev/urandom instead of /dev/random
dev-libs/apr-util:libressl - Use dev-libs/libressl instead of dev-libs/openssl for 'openssl' USE flag
dev-libs/apr-util:nss - Install apr_crypto_nss module
dev-libs/apr-util:openssl - Install apr_crypto_openssl module
dev-libs/beignet:ocl-icd - Enable compatibility with the dev-libs/ocl-icd OpenCL ICD loader
dev-libs/beignet:ocl20 - Enable experimental OpenCL 2.0 support on Skylake and newer architectures
dev-libs/bitset:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations
dev-libs/boost:context - Build and install the Boost.Context (and Boost.Fiber) library and all other Boost libraries that depend on it
dev-libs/boost:debug - Build and install only the debug version of the Boost libraries. Only enable this flag if you're developing against boost.
dev-libs/boost:doc - Install the full API documentation documentation. This takes over 200MB of extra disk space.
dev-libs/boost:nls - Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries.
dev-libs/boost:threads - Build multi-thread-compatible libraries instead of single-threaded only.
dev-libs/boost:tools - Build and install the boost tools (bcp, quickbook, inspect, wave)
dev-libs/botan:boost - use dev-libs/boost
dev-libs/c-blosc:lz4 - Enable lz4 compression
dev-libs/c-blosc:snappy - Enable snappy compression
dev-libs/c-blosc:zstd - Enable zstd compression
dev-libs/check:subunit - Enable support for the subunit unit test protocol
dev-libs/crypto++:asm - Support assembly hand optimized crypto functions (i.e. faster run time)
dev-libs/cyberjack:tools - Build and install optional management tools.
dev-libs/cyberjack:usb - Enable support for usb based chipcard reader.
dev-libs/cyrus-sasl:authdaemond - Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier)
dev-libs/cyrus-sasl:ldapdb - Enable ldapdb plugin
dev-libs/cyrus-sasl:openldap - Add ldap support for saslauthd
dev-libs/cyrus-sasl:sample - Enable sample client and server
dev-libs/cyrus-sasl:srp - Enable SRP authentication
dev-libs/cyrus-sasl:urandom - Use /dev/urandom instead of /dev/random
dev-libs/efl:bmp - Enable WBMP image loader
dev-libs/efl:dds - Enable DDS image loader
dev-libs/efl:drm - Enable DRM engine
dev-libs/efl:eet - Enable Eet image loader
dev-libs/efl:egl - Enable EGL rendering
dev-libs/efl:fribidi - Enable bidirectional text support
dev-libs/efl:gles - Enable the OpenGL ES GL implementation
dev-libs/efl:glib - Enable dev-libs/glib support
dev-libs/efl:harfbuzz - Enable complex text shaping and layout support
dev-libs/efl:hyphen - Enable text hyphenation support
dev-libs/efl:ibus - Enable Intelligent Input Bus
dev-libs/efl:ico - Enable Ico image loader
dev-libs/efl:ivi - Enable ivi-shell support
dev-libs/efl:libuv - Enable dev-libs/libuv support
dev-libs/efl:luajit - USE dev-lang/luajit instead of dev-lang/lua
dev-libs/efl:physics - Enable Bullet physics effects and support
dev-libs/efl:pixman - Enable PixMan for software rendering
dev-libs/efl:ppm - Enable PMAPS image loader
dev-libs/efl:psd - Enable PSD image loader
dev-libs/efl:scim - Enable Smart Common Input Method
dev-libs/efl:system-lz4 - Use system liblz4 instead of bundled one
dev-libs/efl:tga - Enable Tga image loader
dev-libs/efl:tslib - Enable x11-libs/tslib for touchscreen events
dev-libs/efl:unwind - Enable debug support via sys-libs/libunwind
dev-libs/efl:valgrind - Enable usage of dev-util/valgrind in debug
dev-libs/efl:vlc - Enable media-video/vlc support
dev-libs/efl:xcf - Enable XCF image loader
dev-libs/efl:xim - Enable X Input Method
dev-libs/efl:xpresent - Enable x11-libs/libXpresent support
dev-libs/elfutils:lzma - Support automatic decompression of LZMA-compressed files and kernel images
dev-libs/elfutils:threads - Build the libraries with thread safe support
dev-libs/elfutils:utils - Install command-line utilities (all the eu-* programs)
dev-libs/ell:glib - Enable dev-libs/glib support
dev-libs/fcgi:html - Install HTML documentation
dev-libs/folks:telepathy - Load contacts from the Telepathy framework
dev-libs/folks:tracker - Load contacts from app-misc/tracker index
dev-libs/folks:utils - Build the folks-inspect utility
dev-libs/fstrm:utils - Build fstrm utility programs
dev-libs/gf2x:bindist - Disable automatic fine-tuning to local processor features like pclmul or sse2.
dev-libs/gf2x:custom-tune - Extra long compile time for tuning hardware specific low-level routines
dev-libs/gf2x:fft - Build an FFT API for multiplication of 2 polynomials over GF(2)
dev-libs/glib:dbus - Enable dependencies required by glib libraries using dbus service to manage settings saving
dev-libs/glib:mime - Pull in shared MIME database that many glib-based applications require at runtime to detect or open files. Warning: do not disable this flag unless installing on a headless server.
dev-libs/glib:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-libs/glib:utils - Install gtester-report utility to generate test report files for your software; build gresource utility with ELF support.
dev-libs/gmime:smime - Enable experimental S/MIME support
dev-libs/gmp:asm - Enable use of hand optimized assembly routines (faster execution)
dev-libs/gmp:pgo - After building gmp, run some tests against to produce faster libraries -- this option will double the compile time
dev-libs/gobject-introspection:doctool - Install g-ir-doc-tool for generating documentation from introspected data
dev-libs/granite:demo - Build the Granite demo application (to present all available UI features provided by the library)
dev-libs/hidapi:fox - Build a x11-libs/fox GUI
dev-libs/jemalloc:hugepages - Enable transparent huge page support
dev-libs/jemalloc:lazy-lock - Enable lazy locking (only lock when multi-threaded)
dev-libs/jemalloc:stats - Enable statistics calculation/reporting
dev-libs/jemalloc:xmalloc - Add support for xmalloc (abort-on-out-of-memory)
dev-libs/kreport:marble - Enable displaying of maps using kde-apps/marble
dev-libs/kreport:scripting - Support Qml scripting using dev-qt/qtdeclarative
dev-libs/leveldb:snappy - support the snappy compression library
dev-libs/libbase58:tools - Build command line base58 tool
dev-libs/libcdio:minimal - Only build the libcdio library and little more, just to be used to link against from multimedia players. With this USE flag enabled, none of the command-line utilities are built, nor is the CDDA library.
dev-libs/libcec:cubox - Enable support for enable support for the TDA995x
dev-libs/libcec:exynos - Enable support for Exynos chipsets
dev-libs/libcec:raspberry-pi - Enable support for the Raspberry Pi
dev-libs/libcec:xrandr - Enable detection of active HDMI using xrandr extensions
dev-libs/libcgroup:daemon - Install the configuration tools and init/config files.
dev-libs/libcgroup:tools - Install the cgroup rules processing daemon and init/config files.
dev-libs/libdbusmenu:gtk - Enable support for GTK+2
dev-libs/libdbusmenu:gtk3 - Enable support for GTK+3
dev-libs/libdynd:cuda - Enable NVIDIA CUDA toolkit support
dev-libs/libdynd:mkl - Enable a plugin for Intel Math Kernel Library sci-libs/mkl
dev-libs/libevent:debug - Support runtime debug mode and malloc hooks (for programmers)
dev-libs/libffi:pax_kernel - Use PaX emulated trampolines, for we can't use PROT_EXEC
dev-libs/libgcrypt:o-flag-munging - Enable O-flag mangling during build
dev-libs/libgdata:gnome-online-accounts - Enable net-libs/gnome-online-accounts support
dev-libs/libgit2:curl - Use net-misc/curl for HTTP support (otherwise, limited built-in implementation will be used)
dev-libs/libgit2:gssapi - Enable GSSAPI support for SPNEGO auth
dev-libs/libgit2:ssh - Enable SSH transport support
dev-libs/libgit2:trace - Enable tracing support
dev-libs/libgit2-glib:ssh - Enable SSH transport support
dev-libs/libgpg-error:common-lisp - Install common-lisp files
dev-libs/libgweather:glade - Installs catalog files for dev-util/glade
dev-libs/libisoburn:external-filters - Allow the use of external processes as file content filters (Note: this is a potential security risk)
dev-libs/libisoburn:external-filters-setuid - Also allow the use of external setuid processes as file content filters (Note: this is a potential security risk)
dev-libs/libisoburn:frontend-optional - Use dev-tcltk/bwidget which is not strictly required for the frontend
dev-libs/libisoburn:launch-frontend - Enable the tcl gui for xorriso
dev-libs/libisoburn:launch-frontend-setuid - Enable the tcl gui for xorriso under setuid
dev-libs/libisofs:verbose-debug - Enable verbose debug messages
dev-libs/liblogging:rfc3195 - Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it!
dev-libs/liblogging:stdlog - Enables liblogging's core component (think of it as a the next version of the syslog(3) API).
dev-libs/libmail:apop - Enables the APOP authentication method
dev-libs/libmemcached:hsieh - Use Hsieh hash algorithm.
dev-libs/libmemcached:libevent - Use the libevent event loop interface.
dev-libs/libmemcached:sasl - Use sasl auth for communications.
dev-libs/libmspack:utils - Enables building cabrip, chmextract, msexpand and oabextract
dev-libs/libnl:doc - Install development documentation
dev-libs/libnl:python - Install experimental dev-lang/python bindings
dev-libs/libnl:utils - Install command line interface utils
dev-libs/liborcus:spreadsheet-model - Enable the spreadsheet model implementation
dev-libs/liborcus:tools - Build various low-level parsers
dev-libs/libowfat:diet - Compile against dev-libs/dietlibc
dev-libs/libp11:doc - Generate and install API documentation for the package.
dev-libs/libpcre:bzip2 - Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).
dev-libs/libpcre:pcre16 - Build PCRE library for 16 bit characters (e.g. UTF-16).
dev-libs/libpcre:pcre32 - Build PCRE library for 32 bit characters (e.g. UTF-32).
dev-libs/libpcre:readline - Add support for command line editing to pcretest, through sys-libs/readline.
dev-libs/libpcre:recursion-limit - Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit.
dev-libs/libpcre:zlib - Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).
dev-libs/libpcre2:bzip2 - Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).
dev-libs/libpcre2:pcre16 - Build PCRE library for 16 bit characters (e.g. UTF-16).
dev-libs/libpcre2:pcre32 - Build PCRE library for 32 bit characters (e.g. UTF-32).
dev-libs/libpcre2:readline - Add support for command line editing to pcretest, through sys-libs/readline.
dev-libs/libpcre2:recursion-limit - Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit.
dev-libs/libpcre2:zlib - Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).
dev-libs/libpeas:glade - Install the glade catalog
dev-libs/libpeas:python - Build support for loading dev-lang/python plugins
dev-libs/librdkafka:lz4 - Enable support for Kafka's LZ4 compression based on KIP-57 (uses app-arch/lz4)
dev-libs/librelp:gnutls - Use GnuTLS
dev-libs/librelp:libressl - Use LibreSSL
dev-libs/librelp:openssl - Use OpenSSL
dev-libs/libressl:asm - Enables assembly
dev-libs/libsecp256k1:asm - Enable x86_64 assembly optimisation
dev-libs/libsecp256k1:ecdh - Enable ECDH shared secret computation
dev-libs/libsecp256k1:endomorphism - Enable endomorphism
dev-libs/libsecp256k1:experimental - Allow experimental USE flags
dev-libs/libsecp256k1:recovery - Enable ECDSA pubkey recovery module
dev-libs/libsecp256k1:schnorr - Enable Schnorr signature module
dev-libs/libsecp256k1:test_openssl - Enable OpenSSL comparison tests
dev-libs/libslz:tools - Install additional tools (zenc, zdec)
dev-libs/libsodium:asm - Enables assembly implementations
dev-libs/libsodium:urandom - Use /dev/urandom instead of /dev/random
dev-libs/libspt:libtirpc - Build against net-libs/libtirpc for RPC support
dev-libs/libtasn1:valgrind - Enable usage of dev-util/valgrind in debug
dev-libs/libtermkey:demos - Install demos, which pulls in dev-libs/glib
dev-libs/libunibreak:doc - Install html API documentation.
dev-libs/libunibreak:man - Generate man pages with doxygen.
dev-libs/libverto:glib - Support event loops using dev-libs/glib
dev-libs/libverto:libev - Support event loops using dev-libs/libev
dev-libs/libverto:libevent - Support event loops using dev-libs/libevent
dev-libs/libverto:tevent - Support event loops using sys-libs/tevent
dev-libs/libzia:ftdi - Enable support for FTDI USB chips
dev-libs/link-grammar:aspell - Adds support for app-text/aspell spell checker
dev-libs/link-grammar:hunspell - Adds support for app-text/hunspell spell checker
dev-libs/log4cplus:iconv - Use inconv for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cplus:working-c-locale - Use the C99 locale facilities for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cplus:working-locale - Use C++'s std::locale for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/m17n-lib:X - Build the Graphical User Interface API and utilities
dev-libs/m17n-lib:anthy - Enable support for app-i18n/anthy input method
dev-libs/m17n-lib:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
dev-libs/m17n-lib:gd - Build API and utilities based on media-libs/gd. This flag is only meaningful if the X USE flag is also enabled
dev-libs/m17n-lib:libotf - Use dev-libs/libotf to handle OpenType fonts
dev-libs/m17n-lib:libxml2 - Use dev-libs/libxml2 to parse XML
dev-libs/nss:cacert - Include root/class3 certs from CAcert (http://www.cacert.org/)
dev-libs/nss:nss-pem - Add support for libnsspem
dev-libs/nss:utils - Install utilities included with the library
dev-libs/ocl-icd:khronos-headers - Install Khronos OpenCL headers.
dev-libs/oniguruma:crnl-as-line-terminator - enable CR+NL as line terminator
dev-libs/openct:debug - Add debug output to the driver library for pcsc-lite.
dev-libs/openct:pcsc-lite - Build a driver library for sys-apps/pcsc-lite, providing PC/SC API access to devices supported by OpenCT.
dev-libs/openobex:irda - Enable IrDA support
dev-libs/opensc:ctapi - Use CT-API for accessing Smartcard hardware
dev-libs/opensc:notify - Enable notifications
dev-libs/opensc:openct - Use dev-libs/openct (and CT-API) for accessing Smartcard hardware
dev-libs/opensc:pcsc-lite - Use sys-apps/pcsc-lite (and PC/SC API) for accessing Smartcard hardware
dev-libs/opensc:secure-messaging - Enable secure messaging
dev-libs/openssl:asm - Support assembly hand optimized crypto functions (i.e. faster run time)
dev-libs/openssl:bindist - Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI
dev-libs/openssl:rfc3779 - Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)
dev-libs/openssl:sslv2 - Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https
dev-libs/openssl:sslv3 - Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https
dev-libs/openssl:tls-heartbeat - Enable the Heartbeat Extension in TLS and DTLS
dev-libs/pkcs11-helper:nss - Enable NSS crypto engine
dev-libs/poco:7z - Add Support for the 7z archive format
dev-libs/poco:apache - Enable support to write Apache modules using POCO
dev-libs/poco:cppparser - Build and install a minimal C++ parser
dev-libs/poco:crypto - Encryption and digital signing classes
dev-libs/poco:data - Database abstraction layer to easily send/retrieve data to/from various databases
dev-libs/poco:file2pagecompiler - Utility to convert ordinary files to Page Compiler source files
dev-libs/poco:json - Add JSON support
dev-libs/poco:mongodb - Add dev-db/mongodb support
dev-libs/poco:net - Classes to write network clients & servers
dev-libs/poco:pagecompiler - Simple compiler translating HTML pages containing embedded C++ code into HTTPRequestHandler classes
dev-libs/poco:pocodoc - POCO documentation generator
dev-libs/poco:util - Several utility classes (like logger, timer, config file parser)
dev-libs/poco:zip - Add support for the zip & gz archive formats
dev-libs/ppl:lpsol - Build the ppl_lpsol linear programming problem solver
dev-libs/serdisplib:tools - Build optional tools.
dev-libs/starpu:cuda - Enable NVIDIA CUDA toolkit support
dev-libs/starpu:gcc-plugin - Enable GCC extension plugin (experimental)
dev-libs/starpu:opencl - Enable OpenCL support
dev-libs/starpu:spinlock-check - Enable spinlock check
dev-libs/starpu:valgrind - Enable dev-util/valgrind support
dev-libs/tinyxml:stl - Compile with TIXML_USE_STL support
dev-libs/tntnet:server - Enable tntnet server daemon
dev-libs/totem-pl-parser:archive - Enables support for accessing media files in archives transparently via app-arch/libarchive
dev-libs/totem-pl-parser:quvi - Use media-libs/libquvi for parsing video links
dev-libs/tvision:gpm - Support text mode mouse through sys-libs/gpm
dev-libs/ucommon:socks - Build with socks proxy support
dev-libs/userspace-rcu:regression-test - Run regression tests (requires FEATURES=test)
dev-libs/ustr:ustr-import - Install ustr-import developer program and source code for bundling.
dev-libs/weston:colord - Allow setting color managment
dev-libs/weston:drm - Enable drm compositor support
dev-libs/weston:editor - Install wayland-editor example application
dev-libs/weston:fbdev - Enable fbdev compositor support
dev-libs/weston:gles2 - Use GLESv2 cairo instead of full GL
dev-libs/weston:headless - Headless backend and a noop renderer, mainly for testing purposes
dev-libs/weston:ivi - Enable the IVI shell
dev-libs/weston:launch - Install weston-launch utility
dev-libs/weston:rdp - Enable Remote Desktop Protocol compositor support
dev-libs/weston:remoting - Enable plugin to stream output to remote hosts using media-libs/gstreamer
dev-libs/weston:resize-optimization - Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi
dev-libs/weston:screen-sharing - Enable screen-sharing through RDP
dev-libs/weston:unwind - Enable libunwind usage for backtraces
dev-libs/weston:wayland-compositor - Enable Wayland compositor support
dev-libs/weston:xwayland - Enable ability support native X11 applications
dev-libs/xapian:brass - Enabled brass backend db support
dev-libs/xapian:chert - Enabled chert backend db support
dev-libs/xapian:glass - Enabled glass backend db support
dev-libs/xapian:inmemory - Enabled inmemory backend db support
dev-libs/xerces-c:iconv - Use iconv (virtual/libiconv) as message loader and transcoder (in general it would be possible to use iconv only as message loader and something else like icu or the native method as transcoder and vice-versa, but this is a less common case and hard to handle)
dev-libs/xerces-c:threads - Enable threading support through pthread (or other libraries on AIX, IRIX, HPUX, Solars). Highly recommended
dev-libs/xmlrpc-c:abyss - Build the Abyss mini web-server.
dev-libs/xmlrpc-c:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal expat library.
dev-libs/xmlrpc-c:threads - Controls whether to build the Abyss web-server with pthreads or fork 'threading'.
dev-libs/xmlrpc-c:tools - Build the xmlrpc* tools.
dev-libs/xmlsec:gcrypt - Install xmlsec-gcrypt library
dev-libs/xmlsec:gnutls - Install xmlsec-gnutls library
dev-libs/xmlsec:nss - Install xmlsec-nss library
dev-libs/xmlsec:openssl - Install xmlsec-openssl library
dev-libs/yaz:ziffy - Install ziffy, a promiscuous Z39.50 APDU sniffer
dev-lisp/clisp:hyperspec - Use local hyperspec instead of online version
dev-lisp/clisp:new-clx - Build CLISP with support for the NEW-CLX module which is a -C binding to the Xorg libraries
dev-lisp/clisp:svm - Build CLISP with support for the Support Vector Machine module
dev-lisp/ecls:gengc - Use generational garbage collection (experimental)
dev-lisp/ecls:libatomic - Use dev-libs/libatomic_ops library
dev-lisp/ecls:precisegc - Use type information during garbage collection (experimental)
dev-lisp/gcl:ansi - Build a GCL with ANSI support (else build a traditional CLtL1 image)
dev-lisp/gcl:athena - Build xgcl - an interface to x11-libs/libXaw
dev-lisp/sbcl:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
dev-lua/luarocks:curl - Uses net-misc/curl for fetching lua packages instead of net-misc/wget.
dev-lua/luarocks:openssl - Uses dev-libs/openssl for verifying lua packages instead of md5sum.
dev-lua/luvit:bundled-libs - Use bundled versions of some libraries.
dev-ml/cairo-ocaml:pango - Enable support for x11-libs/pango
dev-ml/lablgtk:glade - Enable libglade bindings compilation.
dev-ml/lablgtk:gnomecanvas - Enable libgnomecanvas bindings compilation.
dev-ml/lablgtk:sourceview - Enable GtkSourceView support
dev-ml/ocamlnet:httpd - Enables net-httpd web server component
dev-ml/ocamlnet:zip - Enables netzip support to read/write gzip data using object channels
dev-perl/Business-ISBN:barcode - Install dev-perl/GD-Barcode for rendering ISBN numbers as barcodes
dev-perl/Config-Any:conf - Install dev-perl/Config-General to support decoding .conf/.cnf files
dev-perl/Config-Any:ini - Install dev-perl/Config-Tiny to support decoding INI config files
dev-perl/Config-Any:json - Install support libraries to support decoding JSON config files
dev-perl/Config-Any:xml - Install support libraries to support decoding XML config files
dev-perl/Config-Any:yaml - Install support libraries to support decoding YAML config files
dev-perl/Convert-UUlib:system-uulib - Use dev-libs/uulib instead of bundled version.
dev-perl/Cookie-Baker:xs - Install dev-perl/Cookie-Baker-XS for accelerated performance
dev-perl/DBD-SQLite:system-sqlite - Use the system-wide dev-db/sqlite installation
dev-perl/DBD-mysql:embedded - Support embedded server (libmysqld)
dev-perl/DBD-mysql:ssl - Compile in support for SSL connections via libmysqlclient
dev-perl/File-HomeDir:xdg - Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs
dev-perl/File-Which:pwhich - Install dev-perl/App-pwhich which used to be a part of this package
dev-perl/GD:animgif - Enable animated gif support
dev-perl/GD:fcgi - Build for FastCGI compatibility via dev-libs/fcgi instead of using PerlIO
dev-perl/Graphics-ColorNames:recommended - Install recommended support modules
dev-perl/HTML-Mason:modperl - Enable www-apache/mod_perl support
dev-perl/HTTP-Entity-Parser:xs - Install C-Based dependieces for faster performance
dev-perl/JSON:xs - Install C-based dev-perl/JSON-XS for faster performance
dev-perl/JSON-MaybeXS:xs - Install a C-Based backend to make JSON encode/decode fast
dev-perl/List-MoreUtils:xs - Install C-Based backend implementation for performance
dev-perl/Mail-IMAPClient:md5 - Install support for DIGEST-MD5 and CRAM-MD5 Authentication
dev-perl/Mail-IMAPClient:ntlm - Install support for NTLM Authentication
dev-perl/Mail-IMAPClient:ssl - Install support for SSL Connections
dev-perl/Mail-IMAPClient:zlib - Install support for COMPRESS DEFLATE connections
dev-perl/PDL:badval - Enable bad values support
dev-perl/PDL:hdf - Enable HDF (version 4) format support
dev-perl/PDL:netpbm - Enable NETPBM and MPEG support
dev-perl/PDL:pdl2 - Build pdf2 shell (requires Devel-REPL)
dev-perl/PDL:pgplot - Enable PGPLOT plotting capabilities
dev-perl/Sub-Name:suggested - Install extra dependencies needed for extended regression tests
dev-perl/Test-Warnings:suggested - Install optional dependencies for extra tests
dev-perl/Text-CSV:xs - Install dev-perl/Text-CSV_XS for accelerated decoding
dev-perl/WWW-Form-UrlEncoded:xs - Install C-Based dependieces for faster performance
dev-php/PEAR-HTTP_Request2:curl - Force dev-lang/php to be compiled with curl extension
dev-php/PEAR-HTTP_Request2:fileinfo - Force dev-lang/php to be compiled with fileinfo extension
dev-php/PEAR-HTTP_Request2:ssl - Force dev-lang/php to be compiled with ssl extension
dev-php/PEAR-HTTP_Request2:zlib - Force dev-lang/php to be compiled with zlib extension
dev-php/pecl-apcu:lock_pthreadmutex - Enable pthread mutex locking
dev-php/pecl-apcu:lock_pthreadrw - Enable pthread read/write locking
dev-php/pecl-apcu:lock_semaphore - Enable semaphore locks instead of fcntl
dev-php/pecl-apcu:lock_spinlock - Enable spin locks (EXPERIMENTAL)
dev-php/pecl-event:extra - Add support of the Libevent extra API
dev-php/pecl-memcached:igbinary - Enable support for the igbinary serializer
dev-php/pecl-memcached:json - Enable support for json serialization
dev-php/pecl-redis:igbinary - Enables igbinary serialisation support
dev-python/Kivy:camera - Install libraries needed to support camera
dev-python/Kivy:garden - Install garden tool to manage user maintained widgets
dev-python/PyQt5:bluetooth - Build bindings for the QtBluetooth module
dev-python/PyQt5:dbus - Build bindings for the QtDBus module
dev-python/PyQt5:declarative - Build bindings for the QtQml/QtQuick modules and enable the qmlscene plugin
dev-python/PyQt5:designer - Build bindings for the QtDesigner module and enable the designer plugin
dev-python/PyQt5:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-python/PyQt5:gui - Build bindings for the QtGui module
dev-python/PyQt5:help - Build bindings for the QtHelp module
dev-python/PyQt5:location - Build bindings for the QtLocation module
dev-python/PyQt5:multimedia - Build bindings for the QtMultimedia module
dev-python/PyQt5:network - Build bindings for the QtNetwork module
dev-python/PyQt5:opengl - Build bindings for the QtOpenGL module
dev-python/PyQt5:positioning - Build bindings for the QtPositioning module
dev-python/PyQt5:printsupport - Build bindings for the QtPrintSupport module
dev-python/PyQt5:sensors - Build bindings for the QtSensors module
dev-python/PyQt5:serialport - Build bindings for the QtSerialPort module
dev-python/PyQt5:sql - Build bindings for the QtSql module
dev-python/PyQt5:svg - Build bindings for the QtSvg module
dev-python/PyQt5:testlib - Build bindings for the QtTest module
dev-python/PyQt5:webchannel - Build bindings for the QtWebChannel module
dev-python/PyQt5:webengine - Build bindings for the QtWebEngine module
dev-python/PyQt5:webkit - Build bindings for the QtWebKit module
dev-python/PyQt5:websockets - Build bindings for the QtWebSockets module
dev-python/PyQt5:widgets - Build bindings for the QtWidgets module
dev-python/PyQt5:x11extras - Build bindings for the QtX11Extras module
dev-python/PyQt5:xmlpatterns - Build bindings for the QtXmlPatterns module
dev-python/QtPy:designer - Build bindings for the QtDesigner module and enable the designer plugin
dev-python/QtPy:gui - Build bindings for the QtGui module
dev-python/QtPy:svg - Build bindings for the QtSvg module
dev-python/QtPy:testlib - Build bindings for the QtTest module
dev-python/QtPy:webengine - Build bindings for the QtWebEngine module
dev-python/QtPy:webkit - Build bindings for the QtWebKit module
dev-python/amqplib:extras - Install extra tools to generate initial Python mod from an AMQP XML file
dev-python/anyvc:bazaar - Add support for Bazaar
dev-python/anyvc:mercurial - Add support for Mercurial
dev-python/celery:redis - Enables redis support
dev-python/celery:sqs - Enables Amazon SQS transport module for celery
dev-python/celery:yaml - Enable support of yaml as a configuration file format
dev-python/cgkit:3ds - Enable support for importing 3D Studio models
dev-python/dap:server - Enable OpenDAP server support
dev-python/dask:distributed - Add support for distributed computing with dev-python/distributed
dev-python/fabric:fab2 - Install as "fab2", allowing side-by-side install with fabric 1.x
dev-python/flask-restful:paging - Enable resource paging support
dev-python/geopy:timezone - Enables localized date support
dev-python/geopy:yahoo - Enables use of YahooPlaceFinder
dev-python/glance_store:cinder - enable cinder backend supprt
dev-python/glance_store:swift - enable swift backend supprt
dev-python/glance_store:vmware - enable vmware backend supprt
dev-python/gmpy:mpir - Use sci-libs/mpir as gmp implementation
dev-python/icalendar:doc - Generate examples and other extra documentation
dev-python/ipython:matplotlib - Add support for dev-python/matplotlib
dev-python/ipython:nbconvert - Enable support for converting notebooks to various formats using app-text/pandoc
dev-python/ipython:notebook - Install requirements for the web notebook based on www-servers/tornado
dev-python/kaa-base:tls - SSL/TLS support via dev-python/tlslite
dev-python/kazoo:gevent - Enable support for the gevent based handler
dev-python/kombu:mongodb - Enables MongoDB backend
dev-python/kombu:msgpack - Enables MessagePack (de)serializer for Python
dev-python/kombu:redis - Enables Redis backend
dev-python/kombu:sqs - Enables Amazon SQS transport module for Kombu
dev-python/kombu:yaml - Enables yaml backend
dev-python/markdown:pygments - Enable fancy pygments support
dev-python/matplotlib:excel - Pull dev-python/xlwt for the exceltools toolkit
dev-python/matplotlib:gtk2 - Enable x11-libs/gtk+:2 support
dev-python/matplotlib:gtk3 - Enable x11-libs/gtk+:3 support
dev-python/mpmath:matplotlib - Add support for dev-python/matplotlib
dev-python/msgpack:native-extensions - Compiles native "C" extensions (speedups, instead of using python fallback code).
dev-python/netaddr:cli - Enable netaddr shell with dev-python/ipython
dev-python/networkx:extras - Provide graph drawing and graph layout algorithms along with shapefile format reading and writing
dev-python/networkx:pandas - Provides a DataFrame, which is a tabular data structure with labeled axes
dev-python/networkx:scipy - Enables scipy backend
dev-python/networkx:yaml - Provides YAML format reading and writing
dev-python/nltk:numpy - Use numpy for the saved word tokenizer
dev-python/numexpr:mkl - Enable support for Intel Vector Math Library, part of sci-libs/mkl.
dev-python/pandas:full-support - Pull all packages to give pandas full support
dev-python/paramiko:server - Enable server feature
dev-python/passlib:bcrypt - bcrpyt hash algoryptm support
dev-python/passlib:scrypt - accelerated scrypt algoythm support
dev-python/passlib:totp - time based one time password support
dev-python/paste:flup - enable support for flup (and therefore for various wgsi servers and middleware)
dev-python/paste:openid - enable OpenID support
dev-python/pillow:imagequant - Build with Image Quantization Library support
dev-python/py-amqp:extras - Install extra tools to generate initial Python mod from an AMQP XML file
dev-python/pygame:midi - Enable midi support using media-libs/portmidi
dev-python/pypax:ptpax - Enable PT_PAX_FLAGS support.
dev-python/pypax:xtpax - Enable XATTR_PAX_FLAGS support.
dev-python/pyudev:pygobject - Install PyGobject bindings
dev-python/pyudev:qt5 - Install PyQt5 bindings
dev-python/pyyaml:libyaml - enable support for C implementation using libyaml
dev-python/pyzor:gdbm - Enables the Gdbm back-end database engine for pyzord
dev-python/pyzor:gevent - Use dev-python/gevent to enable asynchronous operation
dev-python/pyzor:mysql - Enables the MySQL back-end database engine for pyzord through dev-python/mysql-python. Only works with python-2.x!
dev-python/pyzor:pyzord - Enable the pyzord server daemon
dev-python/pyzor:redis - Enables the redis back-end database engine for pyzord through dev-python/redis-py
dev-python/rarfile:compressed - Enables the module to support compressed v3 archives by calling the app-arch/unrar.
dev-python/rdflib:redland - enable support for Redland triplestore
dev-python/restkit:cli - Install the restcli command line interface/tool, based on dev-python/ipython
dev-python/setuptools_scm:mercurial - Enables mercurial backend
dev-python/sphinx:net - enable internet capabilities
dev-python/sympy:imaging - Add support for dev-python/pillow
dev-python/sympy:ipython - Add support for dev-python/ipython
dev-python/sympy:mathml - Add support for mathml
dev-python/sympy:pyglet - Use dev-python/pyglet for plots and print preview
dev-python/sympy:symengine - Add support for a dev-python/symengine backend
dev-python/sympy:texmacs - Add app-office/texmacs interface
dev-python/sympy:theano - Add support for dev-python/theano
dev-python/translate-toolkit:html - Support conversion between po and html files
dev-python/translate-toolkit:ical - Support conversion between po and ical files
dev-python/translate-toolkit:ini - Support conversion between po and ini files
dev-python/translate-toolkit:subtitles - Support conversion between po and sub files
dev-python/translate-toolkit:yaml - Support YAML format
dev-python/twisted:conch - include Twisted SSHv2 implementation
dev-python/twisted:http2 - include http2 support
dev-python/twisted:serial - include serial port support
dev-python/twisted-core:serial - include serial port support
dev-python/ws4py:client - Install client modules
dev-python/ws4py:server - Install server modules
dev-python/wxpython:examples - Install interactive demo module browser and sample applets.
dev-python/zsi:twisted - add support for python-twisted (needs dev-python/twisted-core and dev-python/twisted-web)
dev-qt/designer:declarative - Build the qdeclarativeview plugin
dev-qt/designer:webkit - Build the qwebview plugin
dev-qt/linguist-tools:qml - Enable QML support in lupdate
dev-qt/qdoc:qml - Enable QML/JS parsing support
dev-qt/qt-creator:android - Build plugin for Android devices
dev-qt/qt-creator:autotools - Enable autotools project manager plugin
dev-qt/qt-creator:baremetal - Build plugin for bare metal devices
dev-qt/qt-creator:bazaar - Add support for dev-vcs/bzr version control system
dev-qt/qt-creator:clangcodemodel - Build clang-based code model and refactoring plugins
dev-qt/qt-creator:clangstaticanalyzer - Build clang-based static analyzer plugin
dev-qt/qt-creator:clearcase - Add support for IBM ClearCase version control system (requires manual installation of ClearCase client)
dev-qt/qt-creator:cmake - Enable cmake project manager plugin
dev-qt/qt-creator:designer - Build widget designer plugin
dev-qt/qt-creator:glsl - Enable GLSL source code editor
dev-qt/qt-creator:ios - Build plugin for Apple iOS devices
dev-qt/qt-creator:mercurial - Add support for dev-vcs/mercurial version control system
dev-qt/qt-creator:modeling - Enable graphical model editor
dev-qt/qt-creator:nim - Enable Nim source code editor
dev-qt/qt-creator:perforce - Add support for Perforce version control system (requires manual installation of Perforce client)
dev-qt/qt-creator:python - Enable Python source code editor
dev-qt/qt-creator:qbs - Enable QBS project manager plugin
dev-qt/qt-creator:qnx - Build plugin for QNX devices
dev-qt/qt-creator:scxml - Enable graphical SCXML editor
dev-qt/qt-creator:systemd - Add support for retrieving application output from journald
dev-qt/qt-creator:valgrind - Add support for memory debugging using dev-util/valgrind
dev-qt/qt-creator:webengine - Use dev-qt/qtwebengine to view documentation
dev-qt/qt-creator:winrt - Build plugin for WinRT devices
dev-qt/qt-docs:3d - Install documentation for dev-qt/qt3d
dev-qt/qt-docs:bluetooth - Install documentation for dev-qt/qtbluetooth
dev-qt/qt-docs:charts - Install documentation for dev-qt/qtcharts
dev-qt/qt-docs:datavis - Install documentation for dev-qt/qtdatavis3d
dev-qt/qt-docs:declarative - Install documentation for dev-qt/qtdeclarative, dev-qt/qtquickcontrols, and dev-qt/qtquickcontrols2
dev-qt/qt-docs:graphicaleffects - Install documentation for dev-qt/qtgraphicaleffects
dev-qt/qt-docs:html - Install documentation in HTML format
dev-qt/qt-docs:location - Install documentation for dev-qt/qtlocation
dev-qt/qt-docs:multimedia - Install documentation for dev-qt/qtmultimedia
dev-qt/qt-docs:networkauth - Install documentation for dev-qt/qtnetworkauth
dev-qt/qt-docs:qch - Install documentation in QCH format
dev-qt/qt-docs:script - Install documentation for dev-qt/qtscript
dev-qt/qt-docs:sensors - Install documentation for dev-qt/qtsensors
dev-qt/qt-docs:speech - Install documentation for dev-qt/qtspeech
dev-qt/qt-docs:virtualkeyboard - Install documentation for dev-qt/qtvirtualkeyboard
dev-qt/qt-docs:webengine - Install documentation for dev-qt/qtwebengine
dev-qt/qt3d:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qt3d:qml - Build QML/QtQuick bindings
dev-qt/qtbluetooth:qml - Build QML/QtQuick bindings and imports
dev-qt/qtcore:systemd - Enable native journald logging support
dev-qt/qtdeclarative:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtdeclarative:localstorage - Build the LocalStorage import for QtQuick (requires QtSql)
dev-qt/qtdeclarative:widgets - Enable QtWidgets support
dev-qt/qtdeclarative:xml - Build the XmlListModel import for QtQuick (requires QtXmlPatterns)
dev-qt/qtgui:egl - Enable EGL integration
dev-qt/qtgui:eglfs - Build the EGL Full Screen/Single Surface platform plugin
dev-qt/qtgui:evdev - Enable support for input devices via evdev
dev-qt/qtgui:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtgui:ibus - Build the IBus input method plugin
dev-qt/qtgui:libinput - Enable support for input devices via dev-libs/libinput
dev-qt/qtgui:tslib - Enable support for touchscreen devices via x11-libs/tslib
dev-qt/qtgui:tuio - Build plugin to receive touch events over the TUIO protocol
dev-qt/qtgui:xcb - Build the XCB platform plugin and enable X11 integration
dev-qt/qtmultimedia:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtmultimedia:gstreamer - Enable audio support via media-libs/gstreamer using SLOT 1.0
dev-qt/qtmultimedia:qml - Build QML/QtQuick bindings and imports
dev-qt/qtmultimedia:widgets - Build the QtMultimediaWidgets module
dev-qt/qtnetwork:bindist - Disable EC support via dev-libs/openssl
dev-qt/qtnetwork:connman - Enable net-misc/connman-based bearer plugin
dev-qt/qtnetwork:libproxy - Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration
dev-qt/qtnetwork:networkmanager - Enable net-misc/networkmanager-based bearer plugin
dev-qt/qtopengl:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtpositioning:geoclue - Use enhanced location information from app-misc/geoclue
dev-qt/qtpositioning:qml - Build QML bindings
dev-qt/qtprintsupport:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtquickcontrols:widgets - Enable QtWidgets support
dev-qt/qtquickcontrols2:widgets - Enable QtWidgets support
dev-qt/qtscript:scripttools - Build the QtScriptTools module (requires QtWidgets)
dev-qt/qtsensors:qml - Build QML bindings
dev-qt/qtvirtualkeyboard:handwriting - Adds handwriting recognition integration support
dev-qt/qtwayland:libinput - Enable support for input devices via dev-libs/libinput
dev-qt/qtwebchannel:qml - Build QML/QtQuick bindings and imports
dev-qt/qtwebengine:designer - Install the QWebEngineView plugin used to add widgets in dev-qt/designer forms that display web pages.
dev-qt/qtwebengine:geolocation - Enable physical position determination via dev-qt/qtpositioning
dev-qt/qtwebengine:jumbo-build - Combine source files to speed up build process.
dev-qt/qtwebengine:pax_kernel - Enable building under a PaX enabled kernel
dev-qt/qtwebengine:system-ffmpeg - Use the system-wide media-video/ffmpeg instead of bundled.
dev-qt/qtwebengine:system-icu - Use the system-wide dev-libs/icu instead of bundled.
dev-qt/qtwebengine:widgets - Enable QtWidgets support
dev-qt/qtwebkit:geolocation - Enable physical position determination via dev-qt/qtpositioning
dev-qt/qtwebkit:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtwebkit:gstreamer - Enable HTML5 audio/video support via media-libs/gstreamer using SLOT 1.0
dev-qt/qtwebkit:hyphen - Enable hyphenation support via dev-libs/hyphen
dev-qt/qtwebkit:multimedia - Enable HTML5 audio/video support via dev-qt/qtmultimedia
dev-qt/qtwebkit:orientation - Enable device orientation detection via dev-qt/qtsensors
dev-qt/qtwebkit:printsupport - Enable printing via dev-qt/qtprintsupport
dev-qt/qtwebkit:qml - Build QML/QtQuick bindings
dev-qt/qtwebsockets:qml - Build QML bindings
dev-qt/qtwidgets:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-ruby/facter:dmi - Use sys-apps/dmidecode to determine hardware system properties
dev-ruby/facter:pciutils - Use sys-apps/pciutils to determine hardware system properties
dev-ruby/facter:virt - Use app-emulation/virt-what for virtual machine detection
dev-ruby/maruku:highlight - Enable source code highlighting via dev-ruby/syntax
dev-ruby/net-ssh:ed25519 - Use dev-ruby/ed25519 for Ed25519 support
dev-ruby/net-ssh:sodium - Use dev-libs/libsodium via dev-ruby/rbnacl for Ed25519 support
dev-ruby/rrdtool-bindings:graph - Enable support for graphing functions
dev-ruby/rspec-core:highlight - Enable source code highlighting via dev-ruby/coderay
dev-ruby/ruby-sdl:image - Enable media-libs/sdl-image support
dev-ruby/ruby-sdl:mixer - Enable media-libs/sdl-mixer support
dev-ruby/ruby-sdl:sge - Enable sdl-sge support
dev-ruby/rubygems:server - Install support for the rubygems server
dev-scheme/gauche:mbedtls - Enable support for net-libs/mbedtls
dev-scheme/gauche-gl:cg - Enable NVidia Cg binding
dev-scheme/guile:debug-freelist - Include garbage collector freelist debugging code
dev-scheme/guile:debug-malloc - Include malloc debugging code
dev-scheme/guile:deprecated - Enable deprecated features
dev-scheme/guile:discouraged - (implied by deprecated) enable merely discouraged features
dev-scheme/guile:networking - Include networking interfaces
dev-scheme/guile:regex - Include regular expression interfaces
dev-scheme/racket:futures - Enable racket/future library for fine-grained hardware parallelism
dev-scheme/racket:places - Enable racket/place library for share-nothing parallelism and message-passing communication. Compared to futures, places are heavyweight, but they have a simpler performance model.
dev-scheme/racket:threads - Enable support for green threads
dev-scheme/scm:arrays - Support for arrays, uniform-arrays and uniform-vectors.
dev-scheme/scm:bignums - Support for large precision integers.
dev-scheme/scm:cautious - SCM will always check the number of arguments to interpreted closures.
dev-scheme/scm:dynamic-linking - Be able to load compiled files while running.
dev-scheme/scm:engineering-notation - Floats to display in engineering notation (exponents always multiples of 3) instead of scientific notation.
dev-scheme/scm:gsubr - generalized c arguments: for arbitrary (more then 11) arguments to C functions.
dev-scheme/scm:inexact - Support for floating point numbers.
dev-scheme/scm:ioext - Commonly available I/O extensions: line I/O, file positioning, file delete and rename, and directory functions.
dev-scheme/scm:libscm - Build and install libscm.a and related headers
dev-scheme/scm:macro - C level support for hygienic and referentially transparent macros (syntax-rules macros).
dev-scheme/scm:regex - String regular expression matching.
dev-scheme/scm:unix - Support for: nice, acct, lstat, readlink, symlink, mknod and sync.
dev-scheme/slib:gambit - Support for gambit scheme implementation
dev-scheme/slib:scm - Support for scm scheme implementation
dev-tcltk/expect-lite:debug - pull in packages needed for runtime interactive debugger
dev-tcltk/tktreectrl:shellicon - shellicon extension
dev-tex/biblatex:biber - Install the unicode compatible backend processor
dev-tex/dot2texi:pgf - Enable support for dev-tex/pgf (The TeX Portable Graphic Format)
dev-tex/dot2texi:pstricks - Enable pstricks support
dev-texlive/texlive-basic:luajittex - Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.
dev-util/anjuta:devhelp - Enable devhelp integration
dev-util/anjuta:glade - Build glade plugin for anjuta
dev-util/anjuta:packagekit - Use packagekit to search for missing tools
dev-util/anjuta:terminal - Enable terminal plugin based on x11-libs/vte
dev-util/bitcoin-tx:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
dev-util/buildbot:docker - Add support for worker docker command steps
dev-util/buildbot:irc - Add support for status delivery through an ircbot.
dev-util/buildbot:mail - Add support for watching a maildir for commits.
dev-util/buildbot:manhole - Add support for manhole (debug over ssh)
dev-util/bustle:interactivetests - Build interactive test programs
dev-util/bustle:threaded - Build with support for multithreaded execution.
dev-util/catalyst:ccache - Enables ccache support
dev-util/catalyst:system-bootloader - Pulls in the depends needed to setup livecd bootloader from the host system rather than using a cdtar
dev-util/cmake:server - Enable cmake-server support.
dev-util/cmake:system-jsoncpp - Use system copy of dev-libs/jsoncpp instead of bundled one.
dev-util/cppcheck:htmlreport - install cppcheck-htmlreport
dev-util/ctags:json - Enable JSON output support
dev-util/ctags:xml - Enable XML parsing support
dev-util/ctags:yaml - Enable YAML parsing support
dev-util/devhelp:gedit - Install plugin for app-editors/gedit
dev-util/dialog:minimal - Disable library, install command-line program only
dev-util/geany:gtk3 - Use GTK+3 instead of GTK+2
dev-util/geany:vte - Enable Terminal support (x11-libs/vte)
dev-util/geany-plugins:autoclose - Enable the autoclose plugin.
dev-util/geany-plugins:automark - Enable the automark plugin
dev-util/geany-plugins:commander - Enable the commander plugin which provides a command panel for rapid access to any action.
dev-util/geany-plugins:ctags - Enable ctags plugin
dev-util/geany-plugins:debugger - Enable the debugger plugin which interfaces with sys-devel/gdb
dev-util/geany-plugins:defineformat - Enable the defineformat plugin.
dev-util/geany-plugins:enchant - Enable spell checking using enchant
dev-util/geany-plugins:gpg - Enable geanypg plugin which integrates GPG using app-crypt/gpgme
dev-util/geany-plugins:gtk3 - Use GTK+3 instead of GTK+2
dev-util/geany-plugins:gtkspell - Use gtkspell for dictionary support in GeanyVC
dev-util/geany-plugins:multiterm - Enable the multiterm plugin
dev-util/geany-plugins:overview - Enable overview plugin
dev-util/geany-plugins:pretty-printer - Enable pretty-printer plugin
dev-util/geany-plugins:scope - Enable the scope plugin which is a graphical GDB front-end
dev-util/geany-plugins:soup - Enable updatechecker and geniuspaste plugins which require net-libs/libsoup
dev-util/global:vim - Integrate the GNU GLOBAL source code tag system with Vim
dev-util/gnome-builder:clang - Provide integration with sys-devel/clang for best possible C/C++ autocompletion, semantic highlighting, symbol resolving, and diagnostics support
dev-util/gnome-builder:devhelp - Provide API docs browsing and integration via dev-util/devhelp
dev-util/gnome-builder:git - Provide support for the Git version control system via dev-libs/libgit2-glib (such as setup of Git for New Project, direct cloning for Open Project and changed lines indicators in the editor gutter)
dev-util/gnome-builder:sysprof - Provide an integrated profiler via dev-util/sysprof
dev-util/gnome-builder:vala - Provide an autoindenter, autocompletion, diagnostics, and symbol resolver for Vala
dev-util/gnome-builder:webkit - Enable net-libs/webkit-gtk using plugins support and the HTML/Markdown previewer plugin
dev-util/google-perftools:debug - Build a set of libraries with debug support (so-called debugalloc). These are available by default but are not needed unless you're actually developing using tcmalloc.
dev-util/google-perftools:largepages - Use (experimental) larger pages for tcmalloc, this increases memory usage, but should speed up the allocation/free operations.
dev-util/google-perftools:minimal - Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers.
dev-util/google-perftools:optimisememory - To build libtcmalloc with smaller internal caches.
dev-util/gtk-doc:highlight - Enable source code highlighting
dev-util/gtk-doc:vim - Enable source code highlighting through app-editors/vim
dev-util/kdevelop:gdbui - Enable GUI for attaching GDB to a running process
dev-util/kdevelop:hex - Enable hex editor plugin via app-editors/okteta
dev-util/kdevelop:qmake - Enable support for QMake build system
dev-util/kdevelop:reviewboard - Enable reviewboard support
dev-util/kdevelop:webkit - Enable deprecated dev-qt/qtwebkit instead of dev-qt/qtwebengine for integrated documentation
dev-util/ltrace:unwind - Use sys-libs/libunwind for frame unwinding support
dev-util/lttng-tools:ust - Support LTTng-UST (Userspace Tracing)
dev-util/mdds:valgrind - Add support for memory debugging using dev-util/valgrind
dev-util/nemiver:memoryview - Enable the optional hexadecimal memory inspection with app-editors/ghex
dev-util/pkgconf:pkg-config - Install as a replacement for dev-util/pkgconfig
dev-util/pkgconfig:internal-glib - Use internal copy of dev-libs/glib
dev-util/schroot:btrfs - Enable support for chroots using btrfs snapshots.
dev-util/schroot:dchroot - Enables the building of a wrapper named "dchroot", replacing sys-apps/dchroot.
dev-util/schroot:lvm - Enable support for chroots using LVM snapshots.
dev-util/strace:aio - Enable dev-libs/libaio support for tracing Asynchronous I/O operations
dev-util/strace:elfutils - Enable stack backtraces (-k flag) via dev-libs/elfutils
dev-util/strace:unwind - Enable stack backtraces (-k flag) via sys-libs/libunwind
dev-util/suse-build:symlink - Provide compatibility symlinks with original openSUSE package (might clash with other packages)
dev-util/sysprof:systemd - Build the sysprofd daemon service, required to run the UI without root permissions. Relies on sys-apps/systemd running as the init system.
dev-util/systemtap:libvirt - Support probing of libvirt domains.
dev-vcs/bzr:sftp - Enable sftp support
dev-vcs/cssc:valgrind - Enable usage of dev-util/valgrind in tests
dev-vcs/cvs:server - Enable server support
dev-vcs/cvs2svn:bazaar - Support for dev-vcs/bzr
dev-vcs/darcs:diff - Use 'lcs' for diff building.
dev-vcs/darcs:http - Use the pure Haskell HTTP package for HTTP support.
dev-vcs/darcs:network-uri - Get Network.URI from the network-uri package.
dev-vcs/darcs:terminfo - Use the terminfo package for enhanced console support.
dev-vcs/darcs:threaded - Use threading and SMP support.
dev-vcs/fossil:fusefs - Enable the Fuse Filesystem
dev-vcs/fossil:json - Enable the JSON API of Fossil's wiki
dev-vcs/fossil:legacy-mv-rm - Enable legacy behavior for mv/rm (skip checkout files).
dev-vcs/fossil:miniz - Use the bundled miniz for compression instead of zlib. Incompatible with ssl.
dev-vcs/fossil:system-sqlite - Use the system SQLite instead of the bundled one
dev-vcs/fossil:tcl-private-stubs - Enable Tcl integration via private stubs mechanism
dev-vcs/fossil:tcl-stubs - Enable Tcl integration via stubs library mechanism
dev-vcs/fossil:th1-docs - Enable TH1 for embedded documentation pages
dev-vcs/fossil:th1-hooks - Enable TH1 hooks for commands and web pages
dev-vcs/git:blksha1 - Use the new optimized SHA1 implementation
dev-vcs/git:cgi - Install gitweb too
dev-vcs/git:curl - Support fetching and pushing (requires webdav too) over http:// and https:// protocols
dev-vcs/git:gpg - Pull in gnupg for signing -- without gnupg, attempts at signing will fail at runtime!
dev-vcs/git:highlight - GitWeb support for app-text/highlight
dev-vcs/git:mediawiki - Support pulling and pushing from MediaWiki
dev-vcs/git:mediawiki-experimental - Add experimental patches for improved MediaWiki support
dev-vcs/git:pcre-jit - Enable JIT for pcre
dev-vcs/git:ppcsha1 - Make use of a bundled routine that is optimized for the PPC arch
dev-vcs/git:subversion - Include git-svn for dev-vcs/subversion support
dev-vcs/git:tk - Include the 'gitk' and 'git gui' tools
dev-vcs/git:webdav - Adds support for push'ing to HTTP/HTTPS repositories via DAV
dev-vcs/gitg:glade - Install a glade catalog file
dev-vcs/gitg:python - Install Python bindings for those plugins requiring it.
dev-vcs/gitolite:contrib - Install user-contributed files
dev-vcs/gitolite:tools - Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible
dev-vcs/gitolite-gentoo:contrib - Install user-contributed files
dev-vcs/gitolite-gentoo:tools - Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible
dev-vcs/kdesvn:man - Build and install man pages
dev-vcs/mercurial:bugzilla - Support bugzilla integration.
dev-vcs/mercurial:gpg - Support signing with GnuPG.
dev-vcs/mercurial:tk - Install dev-lang/tk for hgk script.
dev-vcs/subversion:ctypes-python - Build and install Ctypes Python bindings
dev-vcs/subversion:dso - Enable runtime module search
dev-vcs/subversion:extras - Install extra scripts (examples, tools, hooks)
dev-vcs/subversion:http - Enable http support using net-libs/serf
dev-vcs/subversion:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
games-action/supermariowar:server - Compile and install Super Mario War server files
games-board/stockfish:armv7 - Build for armv7; enables PIE
games-board/stockfish:general-32 - Generic unoptimized 32-bits build
games-board/stockfish:general-64 - Generic unoptimized 64-bits build
games-board/stockfish:optimize - Enable upstream -O3 optimizations (default enabled)
games-board/tablebase-syzygy:6-pieces - Install tablebases for 6 pieces (huge!)
games-emulation/dolphin:discord-presence - Enables Discord Rich Presence, show the current game on Discord
games-emulation/dolphin:egl - Enable EGL support
games-emulation/dolphin:evdev - Enable evdev input support
games-emulation/dolphin:log - Increase logging output
games-emulation/dolphin:lto - Add support for link-time optimizations.
games-emulation/dosbox:glide - Enable unofficial Glide emulation via media-libs/openglide
games-engines/renpy:development - Install IDE for game developers and an empty game template
games-misc/xcowsay:fortune - Installs the fortune-mod xcow binary
games-roguelike/stone-soup:ncurses - Enable for console (uses ncurses) based build. (can be enabled on top of tiles)
games-roguelike/stone-soup:tiles - Enable for graphical (tiled) build. (can be enabled on top of ncurses)
games-util/pyfa:graph - Enable support for graphs
games-util/wit:fuse - Enable image mount support via fuse
gnome-base/gconf:ldap - Build backend which enables default mail accounts, addressbooks and calendars for Evolution to be configured using each user's LDAP entry."
gnome-base/gdm:fprint - Enables experimental fingerprint authentication using sys-auth/fprintd
gnome-base/gdm:plymouth - Enable support for smooth transition from sys-boot/plymouth
gnome-base/gnome:classic - Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode
gnome-base/gnome:extras - Install additional GNOME applications
gnome-base/gnome-common:autoconf-archive - Pull in sys-devel/autoconf-archive for ax_*.m4 files instead of installing them from the gnome-common tarball
gnome-base/gnome-control-center:colord - Support color management using x11-misc/colord
gnome-base/gnome-control-center:gnome-online-accounts - Enable configuration panel for net-libs/gnome-online-accounts accounts
gnome-base/gnome-control-center:ibus - Enable support for enhanced input methods through app-i18n/ibus
gnome-base/gnome-desktop:license-docs - Install help files documenting GNOME's licenses
gnome-base/gnome-extra-apps:games - Install Gnome Games
gnome-base/gnome-extra-apps:share - Install the gnome-extra/gnome-user-share personal file sharing tool
gnome-base/gnome-extra-apps:shotwell - Install the media-gfx/shotwell photo manager
gnome-base/gnome-extra-apps:tracker - Install the app-misc/tracker indexer and the GNOME packages that require it
gnome-base/gnome-keyring:ssh-agent - Use GNOME Keyring to unlock SSH keys. Recommended unless you are using ECDSA or Ed25519 keys.
gnome-base/gnome-light:gnome-shell - Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode
gnome-base/gnome-settings-daemon:colord - Support color management using x11-misc/colord
gnome-base/gnome-settings-daemon:elogind - Rely on sys-auth/elogind as runtime logind provider
gnome-base/gnome-settings-daemon:openrc-force - Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
gnome-base/gnome-settings-daemon:systemd - Rely on sys-apps/systemd as runtime logind provider
gnome-base/gnome-shell:browser-extension - Ensure the presence of extensions.gnome.org native connector gnome-extra/chrome-gnome-shell
gnome-base/gnome-shell:elogind - Use sys-auth/elogind for session tracking and suspend support.
gnome-base/gnome-shell:ibus - Enable support for enhanced input methods through app-i18n/ibus
gnome-base/gnome-shell:openrc-force - Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
gnome-base/gnome-shell:telepathy - Ensure presence of telepathy chat integration
gnome-base/gvfs:afp - Enables support for accessing AFP (Apple Filing Protocol) network shares
gnome-base/gvfs:archive - Enables support for accessing files in archives transparently via app-arch/libarchive
gnome-base/gvfs:bluray - Enable playback of Blu-ray filesystems using media-libs/libbluray
gnome-base/gvfs:elogind - Use sys-auth/elogind for session tracking.
gnome-base/gvfs:fuse - Enables fuse mount points in $HOME/.gvfs for legacy application access
gnome-base/gvfs:gnome-online-accounts - Enable configuration panel for net-libs/gnome-online-accounts accounts
gnome-base/gvfs:google - Enables support for accessing Google accounts via dev-libs/libgdata
gnome-base/gvfs:http - Enable the HTTP/DAV backend using net-libs/libsoup
gnome-base/gvfs:nfs - Enable NFS client support via net-fs/libnfs.
gnome-base/gvfs:udev - Enable udev base replacement code for cdda feature
gnome-base/libglade:tools - Install libglade-convert Python script.
gnome-base/libgnomecanvas:glade - Enable glade support
gnome-base/librsvg:tools - Build svg viewer tool
gnome-base/nautilus:packagekit - Use packagekit to search for programs to open unknown file types
gnome-base/nautilus:previewer - Use gnome-extra/sushi to preview files from the file mananger
gnome-base/nautilus:sendto - Enable the nautilus-sendto extension to send files to various locations/devices
gnome-base/nautilus:tracker - Add support for app-misc/tracker search and batch rename
gnome-base/orbit:pic - Force libname-server-2 to be built as PIC; needed on hardened systems
gnome-extra/cinnamon-control-center:colord - Support color management using x11-misc/colord
gnome-extra/cinnamon-settings-daemon:colord - Support color management using x11-misc/colord
gnome-extra/evolution-data-server:api-doc-extras - Build documentation for private APIs
gnome-extra/evolution-data-server:berkdb - sys-libs/db support needed to migrate old (pre-3.12 evolution versions) addressbook data
gnome-extra/evolution-data-server:gnome-online-accounts - Enable net-libs/gnome-online-accounts based Google authentication support
gnome-extra/evolution-data-server:google - Enable internal Google authentication support. If gnome-online-accounts is enabled and used, this is not necessary, but both can be supported at the same time with different setup at runtime
gnome-extra/evolution-data-server:weather - Enable optional weather calendar support
gnome-extra/gnome-color-manager:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
gnome-extra/gnome-commander:chm - Enable metadata support for Microsoft Compiled HTML Help files
gnome-extra/gnome-commander:gsf - Add metadata support for OLE, OLE2 and ODF
gnome-extra/gnome-commander:pdf - Add metadata support for PDF
gnome-extra/gnome-commander:python - Add support for python plugins
gnome-extra/gnome-commander:samba - Add support for SAMBA (Windows File and Printer sharing)
gnome-extra/gnome-commander:taglib - Add metadata support for ID3, Vorbis, FLAC and APE
gnome-extra/gnome-commander:unique - Enable single instance support using dev-libs/libunique
gnome-extra/gnome-dvb-daemon:totem - Build a plugin for media-video/totem
gnome-extra/gnome-system-monitor:systemd - Display sys-apps/systemd metadata, e.g. unit names, for running processes
gnome-extra/libgda:canvas - Enable support for x11-libs/goocanvas
gnome-extra/libgda:http - Enable embedded net-libs/libsoup based server
gnome-extra/libgda:json - Enable support for JSON format
gnome-extra/libgda:mdb - Enable support for Microsoft Access database using app-office/mdbtools
gnome-extra/libgda:reports - Install tools for generating graphical reports
gnome-extra/libgda:sourceview - Enable support for x11-libs/gtksourceview
gnome-extra/libgsf:gtk - Enable use of gdk in thumbnailer
gnome-extra/nemo:packagekit - Use packagekit to search for programs to open unknown file types
gnome-extra/nemo:tracker - Add support for app-misc/tracker search
gnome-extra/nm-applet:gcr - Enable advanced certificate chooser, requires app-crypt/gcr
gnome-extra/nm-applet:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
gnome-extra/nm-applet:teamd - Enable teamd configuration editor
gnome-extra/sushi:office - Support viewing file formats such as generated by app-office/libreoffice
gnome-extra/synapse:indicator - Build support for application indicators using dev-libs/libappindicator
gnome-extra/synapse:plugins - Build support for plugins using net-libs/rest
gnustep-apps/gworkspace:gwmetadata - Enable the metadata indexing and searching system
gnustep-base/gnustep-back-art:xim - Enable X11 XiM input method
gnustep-base/gnustep-back-cairo:xim - Enable X11 XiM input method
gnustep-base/gnustep-back-xlib:xim - Enable X11 XiM input method
gnustep-base/gnustep-gui:speech - Audio support using app-accessibility/flite
gnustep-base/gnustep-make:libobjc2 - Enables use of the GNUstep Objective-C runtime (gnustep-base/libobjc2) with non-fragile ABI and sys-devel/clang compiler
gnustep-base/gnustep-make:native-exceptions - Enables use of the native Objective-C exception support (@try/@catch/@finally) built-in objective-c exceptions with compilers that support it
kde-apps/akonadi:designer - Install plugin for dev-qt/designer
kde-apps/akonadi:tools - Install tools for developers and testing
kde-apps/analitza:eigen - Enable dev-cpp/eigen mathematical templates support
kde-apps/ark:zip - Enable ZIP archive support via dev-libs/libzip
kde-apps/artikulate:qtmedia - Enable playback via Qt5Multimedia
kde-apps/cantor:R - Enable dev-lang/R backend support
kde-apps/cantor:analitza - Enable kde-apps/analitza backend support
kde-apps/cantor:julia - Enable dev-lang/julia backend support
kde-apps/cantor:qalculate - Enable sci-libs/libqalculate backend support
kde-apps/dolphin:thumbnail - Enables thumbnail generation
kde-apps/dolphin-plugins:bazaar - Enable support for the bazaar VCS
kde-apps/dolphin-plugins:dropbox - Enable support for the dropbox fileviewer plugin
kde-apps/dolphin-plugins:git - Enable support for the git VCS
kde-apps/dolphin-plugins:mercurial - Enable support for the mercurial VCS
kde-apps/gwenview:activities - Enable kactivities support
kde-apps/gwenview:fits - Enable support for NASA's sci-libs/cfitsio library
kde-apps/gwenview:kipi - Enable support for the KDE Image Plugin Interface
kde-apps/gwenview:mpris - Enable support for MPRIS2 interface, requiring dev-qt/qtdbus as dependency.
kde-apps/k3b:emovix - Enable burning support for eMoviX images
kde-apps/kalzium:editor - Enable the embedded molecule editor/viewer
kde-apps/kalzium:solver - Enable the equation solver
kde-apps/kanagram:speech - Enable text-to-speech support
kde-apps/kate:addons - Build and install additional plugins
kde-apps/kde-apps-meta:pim - Pull in KDE PIM suite
kde-apps/kde-apps-meta:sdk - Pull in developer-specific meta-packages
kde-apps/kdeadmin-meta:cron - Installs KDE application for virtual/cron configuration
kde-apps/kdecore-meta:webengine - Enable www-client/falkon which depends on dev-qt/qtwebengine
kde-apps/kdeedu-meta:webengine - Enable kde-apps/kalzium and kde-apps/parley, requiring dev-qt/qtwebengine
kde-apps/kdegraphics-mobipocket:thumbnail - Enables thumbnail generation
kde-apps/kdemultimedia-meta:cdrom - Include packages for optical discs
kde-apps/kdenetwork-meta:telepathy - Enable support for Plasma Telepathy (instant messaging) integration via kde-apps/plasma-telepathy-meta
kde-apps/kdenlive:freesound - Enable freesound.org credentials support via dev-qt/qtwebkit to download files
kde-apps/kdenlive:gles2 - Use GLES 2.0 or later instead of full OpenGL
kde-apps/kdenlive:jogshuttle - Enable support for Jog-Shuttle devices
kde-apps/kdenlive:share - Enable support for a share menu using kde-frameworks/purpose
kde-apps/kdepim-addons:importwizard - Enable additional import plugins for kde-apps/akonadi-import-wizard
kde-apps/kdepim-runtime:speech - Enable text-to-speech support
kde-apps/kdeutils-meta:floppy - Install kde-apps/kfloppy to format and create DOS or ext2fs filesystems in a floppy.
kde-apps/keditbookmarks:man - Build and install man pages
kde-apps/kget:bittorrent - Enable bittorrent transfer plugin through net-libs/libktorrent
kde-apps/kget:gpg - Enable signature verification by GpgME++ via app-crypt/gpgme
kde-apps/kget:mms - Enable MMS (Microsoft Media Server) plugin through media-libs/libmms
kde-apps/kig:geogebra - Support files created by sci-mathematics/geogebra
kde-apps/kig:scripting - Support Python scripting
kde-apps/kio-extras:activities - Enable activities kioslave and fileitem plugin
kde-apps/kio-extras:man - Enable manpages kioslave
kde-apps/kio-extras:phonon - Enable file audio preview plugin using media-libs/phonon
kde-apps/kio-extras:sftp - Enable SFTP protocol support using net-libs/libssh
kde-apps/kio-extras:taglib - Enable audio thumbnails via media-libs/taglib
kde-apps/kmag:keyboardfocus - Enable keyboard focus tracking
kde-apps/konqueror:activities - Enable kactivities support
kde-apps/konqueror:speech - Build text-to-speech plugin
kde-apps/konqueror:webengine - Enable dev-qt/qtwebengine as web browser engine (fallback is kde-misc/kwebkitpart)
kde-apps/kopete:addbookmarks - Automatically add incoming urls to bookmarks.
kde-apps/kopete:autoreplace - Automatically replace selected text
kde-apps/kopete:contactnotes - Enables writing personal notes for contacts.
kde-apps/kopete:gadu - Enable the Gadu protocol handler.
kde-apps/kopete:groupwise - Enable the Groupwise protocol handler.
kde-apps/kopete:highlight - Allows you to specify highlights on specific events.
kde-apps/kopete:history - Enables saving chat history.
kde-apps/kopete:latex - Embed latex formatted text into messages.
kde-apps/kopete:meanwhile - Enable the Sametime protocol handler.
kde-apps/kopete:nowlistening - Shows song you currently listen to in your status/etc. Bindings for many players.
kde-apps/kopete:otr - Allows crypting your chat (drugs and talking nonsense are considered as good alternatives ;]).
kde-apps/kopete:pipes - Send messages to external pipe.
kde-apps/kopete:privacy - Filter for incoming messages
kde-apps/kopete:statistics - Everybody loves statistic graphs, especially cake ones. ;]
kde-apps/kopete:testbed - Enable the testbed protocol.
kde-apps/kopete:texteffect - Various fancy text effects for your messages (don't ever consider writing us with this enabled ;]).
kde-apps/kopete:translator - Translate incoming and outgoing messages.
kde-apps/kopete:urlpicpreview - Enables in conversation pictures preview.
kde-apps/kopete:webpresence - Show your status and some more information on web.
kde-apps/kopete:winpopup - Enable pop-up messages sending on windows. (same as good old "net send" messages ;])
kde-apps/kopete:zeroconf - Enable Link-Local Messaging via the bonjour protocol.
kde-apps/kpimtextedit:designer - Build plugins for dev-qt/designer
kde-apps/kpimtextedit:speech - Enable text-to-speech support
kde-apps/ktp-accounts-kcm:experimental - Enables disabled telepathy services (currently only steam)
kde-apps/ktp-common-internals:otr - Enable support for encrypted conversations using Off-The-Records messaging
kde-apps/ktp-common-internals:sso - Enable support for Single sign-on through KAccounts
kde-apps/ktp-text-ui:speech - Enable incoming messages to be read out using text-to-speech
kde-apps/kwave:qtmedia - Enable playback via Qt5Multimedia
kde-apps/libkdepim:designer - Build plugins for dev-qt/designer
kde-apps/libksane:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
kde-apps/mailcommon:designer - Build plugins for dev-qt/designer
kde-apps/marble:aprs - Enable support for APRS data sources
kde-apps/marble:designer - Install plugin for dev-qt/designer
kde-apps/marble:phonon - Enable sound support via media-libs/phonon
kde-apps/marble:shapefile - Enable support for ESRI shapefiles
kde-apps/okular:chm - Enable support for Microsoft Compiled HTML Help files
kde-apps/okular:epub - Enable E-Book support via app-text/ebook-tools
kde-apps/okular:image-backend - Enable image viewing support
kde-apps/okular:markdown - Enable Markdown support via app-text/discount
kde-apps/okular:mobi - Enable mobipocket support
kde-apps/okular:mobile - Enable Plasma mobile support
kde-apps/okular:plucker - Enable Plucker E-Book for Palm OS devices support
kde-apps/okular:share - Enable support for a share menu using kde-frameworks/purpose
kde-apps/okular:speech - Enable text-to-speech support
kde-apps/pimcommon:designer - Build plugins for dev-qt/designer
kde-apps/spectacle:kipi - Enable support for the KDE Image Plugin Interface
kde-apps/spectacle:share - Enable support for a share menu using kde-frameworks/purpose
kde-apps/step:qalculate - Enable the libqalculate library for unit conversion
kde-frameworks/frameworkintegration:appstream - Enable AppStream software metadata support
kde-frameworks/kconfigwidgets:man - Build and install man pages
kde-frameworks/kded:man - Build and install man pages
kde-frameworks/kdesignerplugin:designer - Build KF5 widgets plugin for QtDesigner
kde-frameworks/kdesignerplugin:webkit - Build kdewebkit plugin for QtDesigner
kde-frameworks/kfilemetadata:epub - Enable support for reading EPUB ebook metadata
kde-frameworks/kfilemetadata:office - Enable support for reading ODF and OOXML metadata
kde-frameworks/kimageformats:eps - Support the EPS graphics file format
kde-frameworks/kinit:caps - Capabilities support for improved security and better OOM handling
kde-frameworks/kinit:man - Build and install man pages
kde-frameworks/kio:kwallet - Enable permanent storage of passwords for kpasswdserver with kde-frameworks/kwallet
kde-frameworks/knotifications:phonon - Play notification sounds via media-libs/phonon instead of media-libs/libcanberra
kde-frameworks/knotifications:speech - Enable text-to-speech notification support
kde-frameworks/knotifyconfig:phonon - Add sound support via media-libs/phonon
kde-frameworks/kpackage:man - Build and install man pages
kde-frameworks/kservice:man - Build and install man pages
kde-frameworks/ktexteditor:editorconfig - Enable support for EditorConfig configuration files
kde-frameworks/ktextwidgets:speech - Enable text-to-speech support
kde-frameworks/kwallet:gpg - Support wallets with GnuPG encryption in addition to the default blowfish-encrypted file
kde-frameworks/kwallet:man - Build and install man pages
kde-frameworks/kxmlgui:attica - Enable support for kde-frameworks/attica
kde-frameworks/networkmanager-qt:teamd - Enable Teamd control support
kde-frameworks/plasma:gles2 - Use GLES 2.0 or later instead of full OpenGL
kde-frameworks/prison:qml - Enable QML/QtQuick support via dev-qt/qtdeclarative
kde-frameworks/purpose:kaccounts - Enable support for system-wide defined KAccounts
kde-frameworks/sonnet:aspell - Enable the app-text/aspell spell-checking backend
kde-frameworks/sonnet:hunspell - Enable the app-text/hunspell spell-checking backend
kde-misc/kdeconnect:app - Enable experimental kcapp frontend
kde-misc/kdeconnect:mousepad - Enable remote mousepad plugin using x11-libs/libfakekey
kde-misc/kdeconnect:wayland - Enable kwin_wayland support for mousepad plugin using kde-frameworks/kwayland
kde-misc/kio-gdrive:kaccounts - Use kde-apps/kaccounts-integration backend (default) instead of dev-libs/qtkeychain
kde-misc/kmarkdownwebview:webkit - Use dev-qt/qtwebkit instead of dev-qt/qtwebengine
kde-misc/tellico:discid - Add support for reading disc IDs from audio CDs
kde-misc/tellico:yaz - Add support for searching Z39.50 databases
kde-plasma/kde-cli-tools:kdesu - Build graphical frontend for kde-frameworks/kdesu
kde-plasma/kdeplasma-addons:share - Enable applet for quickly sharing data to a variety of sources
kde-plasma/kdeplasma-addons:webengine - Enable dictionary and web browser applets using dev-qt/qtwebengine
kde-plasma/kinfocenter:gles2 - Show OpenGL ES information in kinfocenter
kde-plasma/kinfocenter:pci - Show advanced PCI information
kde-plasma/kmenuedit:hotkeys - Enable support for hotkey editing
kde-plasma/kwin:gles2 - Use OpenGL ES 2 instead of full GL
kde-plasma/kwin:multimedia - Enable effect video button in desktop effects KCM
kde-plasma/libksysguard:webkit - Enable display of detailed memory information using dev-qt/qtwebkit.
kde-plasma/plasma-desktop:appstream - Enable AppStream software metadata support
kde-plasma/plasma-desktop:ibus - Use ibus input method via app-i18n/ibus
kde-plasma/plasma-desktop:mouse - Enable mouse KCM
kde-plasma/plasma-desktop:scim - Enable applets that use app-i18n/scim
kde-plasma/plasma-desktop:touchpad - Enable touchpad KCM
kde-plasma/plasma-meta:browser-integration - Enable integration with Chrome/Firefox with browser extensions
kde-plasma/plasma-meta:consolekit - Enable sys-auth/consolekit support instead of logind session tracking
kde-plasma/plasma-meta:crypt - Pull in kde-plasma/plasma-vault for encrypted vaults integration
kde-plasma/plasma-meta:display-manager - Pull in a graphical display manager
kde-plasma/plasma-meta:elogind - Use sys-auth/elogind for session tracking
kde-plasma/plasma-meta:grub - Pull in Breeze theme for sys-boot/grub
kde-plasma/plasma-meta:gtk - Enable Breeze widget style and KCM for GTK2 and GTK3
kde-plasma/plasma-meta:legacy-systray - Add support for legacy applications using kde-plasma/xembed-sni-proxy
kde-plasma/plasma-meta:pam - Enable support for kwallet auto-unlocking
kde-plasma/plasma-meta:plymouth - Pull in Breeze theme for sys-boot/plymouth
kde-plasma/plasma-meta:pm-utils - Enable support for suspend/resume with sys-power/pm-utils when using sys-auth/consolekit
kde-plasma/plasma-meta:pulseaudio - Install Plasma applet for PulseAudio volume management
kde-plasma/plasma-meta:sddm - Pull in the x11-misc/sddm display manager and KCM
kde-plasma/plasma-meta:sdk - Pull in kde-plasma/plasma-sdk for Plasma development
kde-plasma/plasma-meta:wallpapers - Install wallpapers for the Plasma Workspace
kde-plasma/plasma-nm:modemmanager - Enable support for mobile broadband devices
kde-plasma/plasma-nm:openconnect - Build support for the OpenConnect VPN client
kde-plasma/plasma-nm:teamd - Enable Teamd control support
kde-plasma/plasma-workspace:appstream - Enable AppStream software metadata support
kde-plasma/plasma-workspace:geolocation - Enables dataengine providing location information
kde-plasma/plasma-workspace:prison - Enable support for barcodes/QRcodes
kde-plasma/plasma-workspace:qalculate - Enable Qalculate runner using sci-libs/libqalculate
kde-plasma/powerdevil:brightness-control - Enable screen brightness control using app-misc/ddcutil
kde-plasma/powerdevil:wireless - Enable wireless energy saving actions via kde-frameworks/bluez-qt and kde-frameworks/networkmanager-qt
kde-plasma/systemsettings:classic - Enable classic mode plugin, requires kde-frameworks/khtml
lxde-base/lxdm:consolekit - Enables support for authorization using consolekit
lxde-base/lxdm:gtk3 - Use GTK+3 instead of 2
lxde-base/lxterminal:gtk3 - Use GTK+3 instead of GTK+2
lxqt-base/lxqt-config:monitor - Build monitor settings tool
lxqt-base/lxqt-meta:about - Install lxqt-base/lxqt-about
lxqt-base/lxqt-meta:admin - Install lxqt-base/lxqt-admin
lxqt-base/lxqt-meta:filemanager - Install x11-misc/pcmanfm-qtfile manager
lxqt-base/lxqt-meta:lightdm - Install x11-misc/lightdmdisplay manager
lxqt-base/lxqt-meta:lximage - Install media-gfx/lximage-qtimage viewer
lxqt-base/lxqt-meta:minimal - Do not install x11-wm/openboxwindow manager
lxqt-base/lxqt-meta:powermanagement - Install lxqt-base/lxqt-powermanagement package
lxqt-base/lxqt-meta:processviewer - Install x11-misc/qps package
lxqt-base/lxqt-meta:screenshot - Install x11-misc/screengrab package
lxqt-base/lxqt-meta:sddm - Install x11-misc/sddm display manager
lxqt-base/lxqt-meta:ssh-askpass - Install lxqt-base/lxqt-openssh-askpass user password prompt tool
lxqt-base/lxqt-meta:sudo - Install lxqt-base/lxqt-sudo
lxqt-base/lxqt-meta:terminal - Install x11-terms/qterminal package
lxqt-base/lxqt-panel:clock - Build clock plugin
lxqt-base/lxqt-panel:colorpicker - Build colorpicker plugin
lxqt-base/lxqt-panel:cpuload - Build cpuload plugin
lxqt-base/lxqt-panel:desktopswitch - Build desktopswitch plugin
lxqt-base/lxqt-panel:directorymenu - Build directorymenu plugin
lxqt-base/lxqt-panel:dom - Build dom plugin
lxqt-base/lxqt-panel:kbindicator - Build kbindicator plugin
lxqt-base/lxqt-panel:mainmenu - Build mainmenu plugin
lxqt-base/lxqt-panel:mount - Build mount plugin
lxqt-base/lxqt-panel:networkmonitor - Build networkmonitor plugin
lxqt-base/lxqt-panel:quicklaunch - Build quicklaunch plugin
lxqt-base/lxqt-panel:sensors - Build sensors plugin
lxqt-base/lxqt-panel:showdesktop - Build showdesktop plugin
lxqt-base/lxqt-panel:spacer - Build spacer plugin
lxqt-base/lxqt-panel:statusnotifier - Build statusnotifier plugin
lxqt-base/lxqt-panel:sysstat - Build sysstat plugin
lxqt-base/lxqt-panel:taskbar - Build taskbar plugin
lxqt-base/lxqt-panel:tray - Build tray plugin
lxqt-base/lxqt-panel:volume - Build volume plugin
lxqt-base/lxqt-panel:worldclock - Build worldclock plugin
lxqt-base/lxqt-session:themes - Install LXQt themes and graphics
mail-client/alpine:chappa - enhance alpine by applying Eduardo Chappa's patches
mail-client/alpine:onlyalpine - installs only the alpine binary, so it does not collied with pico and/or pine
mail-client/alpine:passfile - Adds support for caching passwords into a file between sessions
mail-client/alpine:smime - Enable support for S/MIME
mail-client/balsa:crypt - Adds support for GnuPG encryption
mail-client/balsa:rubrica - Adds support for rubrica addressbook
mail-client/claws-mail:archive - Enable archiving plugin
mail-client/claws-mail:bogofilter - Build mail-filter/bogofilter plugin
mail-client/claws-mail:dillo - Enable dillo html viewer plugin
mail-client/claws-mail:gdata - Enable plugin for access to Google data providers
mail-client/claws-mail:gtk3 - Build support for GTK+3
mail-client/claws-mail:libcanberra - Enable sound notification in connection with USE=notification
mail-client/claws-mail:libindicate - Enable notification through DBUS in connection with USE=notification
mail-client/claws-mail:libnotify - Enable notification on the desktop in connection with USE=notification
mail-client/claws-mail:notification - Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify
mail-client/claws-mail:pgp - Enable PGP support
mail-client/claws-mail:sieve - Build plugin for sieve filter support
mail-client/claws-mail:smime - Build plugin for S/MIME support
mail-client/claws-mail:spam-report - Enable plugin for spam reporting to various services
mail-client/claws-mail:spamassassin - Build mail-filter/spamassassin plugin
mail-client/claws-mail:valgrind - Add support for memory debugging using valgrind
mail-client/evolution:archive - Enable archives support in attachments via app-arch/gnome-autoar
mail-client/evolution:bogofilter - Build mail-filter/bogofilter plugin
mail-client/evolution:crypt - Enable GPG encryption support using app-crypt/gnupg and app-crypt/pinentry
mail-client/evolution:geolocation - Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain
mail-client/evolution:highlight - Enable text highlighting plugin
mail-client/evolution:ldap - Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap
mail-client/evolution:spamassassin - Build mail-filter/spamassassin plugin
mail-client/evolution:weather - Enable optional weather calendar support
mail-client/evolution:ytnef - Enable optional TNEF attachments parser support using net-mail/ytnef
mail-client/mail-notification:sylpheed - Enable support for MH mailboxes used by mail-client/sylpheed
mail-client/mutt:berkdb - Enable sys-libs/db database backend for header caching
mail-client/mutt:crypt - Add support for encryption -- using mcrypt or gpg where applicable
mail-client/mutt:gdbm - Enable sys-libs/gdbm database backend for header caching
mail-client/mutt:gpg - Enable support for app-crypt/gpgme
mail-client/mutt:gpgme - Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP
mail-client/mutt:hcache - Enable header cache, one database backend needs to be enabled
mail-client/mutt:lmdb - Enable dev-db/lmdb database backend for header caching
mail-client/mutt:notmuch - Enable support for net-mail/notmuch
mail-client/mutt:pgp_classic - Build classic_pgp backend to support PGP/MIME and traditional/inline PGP
mail-client/mutt:pop - Enable support for POP3 mailboxes
mail-client/mutt:smime - Enable support for smime
mail-client/mutt:smime_classic - Build classic_smime backend to support S/MIME
mail-client/mutt:smtp - Enable support for direct SMTP delivery
mail-client/mutt:tokyocabinet - Enable dev-db/tokyocabinet database backend for header caching
mail-client/nail:kerberos - If network is enabled, this adds support for GSSAPI login on IMAP through virtual/krb5.
mail-client/nail:net - Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call.
mail-client/nail:ssl - If network is enabled, this adds support for S/MIME and SSL/TLS-powered protocols through dev-libs/openssl.
mail-client/neomutt:berkdb - Enable BDB (Berkley DB) backend for header caching
mail-client/neomutt:crypt - Add support for encryption -- using mcrypt or gpg where applicable
mail-client/neomutt:gdbm - Enable GDBM (GNU dbm) backend for header caching
mail-client/neomutt:gpg - Enable support for app-crypt/gpgme
mail-client/neomutt:gpgme - Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP
mail-client/neomutt:kyotocabinet - Enable Kyoto Cabinet database backend for header caching
mail-client/neomutt:lmdb - Enable LMDB (Lightning Memory-Mapped Database) backend for header caching
mail-client/neomutt:notmuch - Enable support for net-mail/notmuch
mail-client/neomutt:pgp_classic - Build classic_pgp backend to support PGP/MIME and traditional/inline PGP
mail-client/neomutt:qdbm - Enable QDBM (Quicker Database Manager) database backend for header caching
mail-client/neomutt:smime - Enable support for smime
mail-client/neomutt:smime_classic - Build classic_smime backend to support S/MIME
mail-client/neomutt:tokyocabinet - Enable Tokyo Cabinet database backend for header caching
mail-client/roundcube:change-password - Allow users to change passwords through Roundcube
mail-client/roundcube:enigma - Add dependencies to support server-side GnuPG signing and/or encryption through the enigma plugin
mail-client/roundcube:ldap - Add dependencies to support connecting to an LDAP address book server
mail-client/roundcube:managesieve - Add dependencies to support the sieverules plugin
mail-client/sylpheed:oniguruma - Use dev-libs/oniguruma for regular expression
mail-client/thunderbird:bindist - Disable official Thunderbird branding (icons, name) which are not binary-redistributable according to upstream.
mail-client/thunderbird:clang - Use Clang compiler instead of GCC
mail-client/thunderbird:crypt - Enable encryption support with enigmail
mail-client/thunderbird:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
mail-client/thunderbird:gtk2 - Use the cairo-gtk2 rendering engine instead of the default cairo-gtk3
mail-client/thunderbird:lightning - Enable app-global calendar support (note 38.0 and above bundles calendar support when this flag is off)
mail-client/thunderbird:minimal - Remove the software development kit and headers
mail-client/thunderbird:mozdom - Enable Mozilla's DOM inspector
mail-client/thunderbird:rust - Enable support for using rust compiler (experimental)
mail-client/thunderbird:system-cairo - Use the system-wide x11-libs/cairo instead of bundled.
mail-client/thunderbird:system-harfbuzz - Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled.
mail-client/thunderbird:system-icu - Use the system-wide dev-libs/icu instead of bundled.
mail-client/thunderbird:system-jpeg - Use the system-wide media-libs/libjpeg-turbo instead of bundled.
mail-client/thunderbird:system-libevent - Use the system-wide dev-libs/libevent instead of bundled.
mail-client/thunderbird:system-libvpx - Use the system-wide media-libs/libvpx instead of bundled.
mail-client/thunderbird:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
mail-client/thunderbird-bin:crashreporter - Enable crash reporter for bugs
mail-client/trojita:password - Store passwords securely via dev-libs/qtkeychain
mail-filter/amavisd-new:courier - Add courier support
mail-filter/amavisd-new:dkim - Add DomainKeys Identified Mail support
mail-filter/amavisd-new:qmail - Add qmail support
mail-filter/amavisd-new:razor - Add support for mail-filter/razor
mail-filter/amavisd-new:spamassassin - Add support for mail-filter/spamassassin
mail-filter/amavisd-new:zmq - Add support for zeromq sockets
mail-filter/bogofilter:tokyocabinet - Enable Tokyo Cabinet database support
mail-filter/clamassassin:clamd - Use the app-antivirus/clamav daemon for virus checking
mail-filter/clamassassin:subject-rewrite - Adds support for subject rewriting
mail-filter/dcc:rrdtool - Enable net-analyzer/rrdtool interface scripts
mail-filter/dspam:daemon - Enable support for DSPAM to run in --daemon mode
mail-filter/dspam:debug - Enable debugging support (don't enable this unless something needs testing!)
mail-filter/dspam:domain-scale - Build for domain scale setups - puts data to $HOME/data/domain.com/user
mail-filter/dspam:hash - Enable support for the file-orientated hash driver
mail-filter/dspam:large-scale - Build for large scale setups - puts data to $HOME/data/u/s/user
mail-filter/dspam:small-scale - Build for small scale setups - puts data to $HOME/data/user
mail-filter/dspam:user-homedirs - Build with user homedir support
mail-filter/dspam:virtual-users - Build with virtual-users support
mail-filter/libmilter:poll - Use poll instead of select
mail-filter/maildrop:authlib - Add courier-authlib support
mail-filter/maildrop:dovecot - Add dovecot authentication support
mail-filter/maildrop:tools - Install maildirmake and deliverquota tools
mail-filter/maildrop:trashquota - Count deleted messages as part of the maildir quota
mail-filter/mimedefang:poll - Use poll instead of select
mail-filter/opendkim:ldap - Enable openldap as a dataset facilitator or keys, determining domains to sign for, and any other dataset that opendkim supports.
mail-filter/opendkim:lmdb - Add support for using dev-db/lmdb
mail-filter/opendkim:lua - Enables control over signature verification, filtering and policy to be controlled by user defined lua scripts.
mail-filter/opendkim:memcached - Add support for using dev-libs/libmemcached
mail-filter/opendkim:opendbx - Use opendbx backend to facilitate dataset driven OpenDKIM configuration options like stats, bodylengthdb, etc. against a wide variety of database types
mail-filter/opendkim:poll - Use poll() instead of select() for the provided asynchronous resolver library.
mail-filter/opendkim:sasl - Used to authenticate to a LDAP server in various ways if required.
mail-filter/opendkim:unbound - Use the unbound dnssec library to perform DKIM DNS queries.
mail-filter/opendmarc:reports - Install the reports binaries: expire, import, reports, params
mail-filter/opendmarc:spf - Use the mail-filter/libspf2 for Sender Policy Framework checking
mail-filter/postgrey:targrey - Enables the targrey patch
mail-filter/spamassassin:cron - Install a cron job to update SpamAssassin's rules daily.
mail-filter/spamassassin:qmail - Build qmail functionality and docs
mail-filter/spamdyke:ssl - Enables TLS protocol for spamdyke
mail-mta/courier:fax - Enables fax support in the courier mail server
mail-mta/courier:norewrite - Prevents courier mail server from mangling virtual user addresses when sending
mail-mta/courier:web - Enable the web interface
mail-mta/courier:webmail - Enable the webmail interface
mail-mta/exim:arc - Adds support for Authenticated Receive Chain (ARC)
mail-mta/exim:dane - Adds support for DNS-based Authentication of Named Entities
mail-mta/exim:dcc - Adds support for Distributed Checksum Clearinghouse (DCC)
mail-mta/exim:dkim - Adds support for DomainKeys Identified Mail (DKIM)
mail-mta/exim:dlfunc - Install local_scan.h header to compile separate dlfunc libraries
mail-mta/exim:dmarc - Adds support for DMARC
mail-mta/exim:dnsdb - Adds support for a DNS search for a record whose domain name is the supplied query
mail-mta/exim:dovecot-sasl - Adds support for Dovecot's authentication
mail-mta/exim:dsn - Adds support for Delivery Status Notifications (DSN)
mail-mta/exim:exiscan-acl - Patch providing support for content scanning
mail-mta/exim:lmtp - Adds support for lmtp
mail-mta/exim:mbx - Adds support for UW's mbx format
mail-mta/exim:pkcs11 - Require pkcs11 support in net-libs/gnutls with USE=gnutls
mail-mta/exim:prdr - Adds support for Per-Recipient Data Response
mail-mta/exim:proxy - Add support for being behind a proxy, such as HAProxy
mail-mta/exim:redis - Adds support for querying dev-db/redis
mail-mta/exim:spf - Adds support for Sender Policy Framework
mail-mta/exim:srs - Adds support for Sender Rewriting Scheme
mail-mta/exim:tpda - Adds support for Transport Post-Delivery Actions
mail-mta/msmtp:daemon - Build/install msmtpd MTA daemon
mail-mta/msmtp:mta - Enable this to install as system-wide MTA
mail-mta/netqmail:authcram - Enable AUTHCRAM support
mail-mta/netqmail:gencertdaily - Generate SSL certificates daily instead of hourly
mail-mta/netqmail:highvolume - Prepare netqmail for high volume servers
mail-mta/postfix:dovecot-sasl - Enable net-mail/dovecot protocol version 1 (server only) SASL implementation
mail-mta/postfix:eai - Add support for SMTPUTF8
mail-mta/postfix:ldap-bind - Add support for binding to LDAP backend using dev-libs/cyrus-sasl
mail-mta/postfix:lmdb - Add support for using dev-db/lmdb for lookup tables
mail-mta/postfix:memcached - Add support for using net-misc/memcached for lookup tables
mail-mta/postfix:vda - Add support for virtual delivery agent quota enforcing
mail-mta/ssmtp:mta - Install symlinks for sendmail-compatible MTA.
mate-base/caja:mate - Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.
mate-base/caja:packagekit - Enable support for installing via app-admin/packagekit based on mimetype
mate-base/mate:base - Install base MATE Desktop applications that are recommended for the most common usage; for example, this installs the file manager. Disable this and other USE flags if you want a more minimal MATE Desktop.
mate-base/mate:extras - Install additional MATE Desktop applications that are recommended for extended usage of the MATE Desktop as upstream sees it; for example, this installs MATE Desktop's office related applications. Disable this if you plan to use your own non-MATE Desktop alternatives or a custom mixture of MATE and non-MATE packages.
mate-base/mate:help - Install gnome-extra/yelp to handle in application help menus and documentation browsing
mate-base/mate:notification - Force notification daemon to default to MATE's notification daemon. Enabled by default. Disable if it causes conflicts with other installed desktop environments.
mate-base/mate:themes - Install MATE Desktop's themes; if you use other themes, you can disable this to spare some space and time.
mate-base/mate-applets-meta:appindicator - Pull in mate-extra/mate-indicator-applet for AppIndicator applet
mate-base/mate-applets-meta:sensors - Pull in mate-extra/mate-sensors-applet for hw sensors applet
mate-base/mate-control-center:appindicator - Add support for AppIndicator
mate-base/mate-session-manager:xtrans - Build with Xtrans support; WARNING: Disabling this flag will result in ICE binding on all interfaces
mate-extra/caja-extensions:cdr - Add an extension to burn files to cds using app-cdr/brasero.
mate-extra/caja-extensions:gajim - Add an extension to support net-im/gajim.
mate-extra/caja-extensions:gksu - Add an extension to support opening files as root with x11-libs/gksu.
mate-extra/caja-extensions:image-converter - Add image conversion support.
mate-extra/caja-extensions:mail - Add an extension to support e-mail functionality.
mate-extra/caja-extensions:open-terminal - Add an extension to support an open terminal.
mate-extra/caja-extensions:pidgin - Add an extension to support net-im/pidgin
mate-extra/caja-extensions:share - Add an extension to support sharing files.
mate-extra/caja-extensions:wallpaper - Add an extension to support setting an image as the current wallpaper
mate-extra/mate-polkit:accountsservice - Support extraction of data from AccountsService
mate-extra/mate-polkit:appindicator - Add support for AppIndicator
mate-extra/mate-power-manager:applet - Enable building of the MATE applet.
mate-extra/mate-power-manager:pm-utils - Adds support for suspend/resume using upower-pm-utils instead of sys-power/upower
mate-extra/mate-screensaver:consolekit - Enable support for sys-auth/consolekit
mate-extra/mate-utils:applet - Enable the mate dictionary applet
media-fonts/corefonts:tahoma - Also install the Tahoma font. Due to the lack of a free bold variant, this may render badly. See bug 184790.
media-fonts/culmus:ancient - Install ancient semitic scripts
media-fonts/culmus:fancy - Install fancy fonts
media-fonts/culmus:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/culmus:taamey - Install taamey fonts
media-fonts/dejavu:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/intlfonts:bdf - Installs BDF fonts in addition to PCF
media-fonts/liberation-fonts:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/mplus-outline-fonts:ipafont - Generates new fonts merged with media-fonts/ja-ipafonts
media-fonts/sil-charis:compact - Use more compactly spaced font
media-fonts/sil-gentium:compact - Also install more compact version of the font.
media-fonts/terminus-font:a-like-o - Changes view of letter 'a' - a looks like o (see homepage)
media-fonts/terminus-font:center-tilde - Place the '~' character vertically centered on the line instead of to the top.
media-fonts/terminus-font:distinct-l - ll2 variant with more distinctive l (lowercase L)
media-fonts/terminus-font:pcf - Install Portable Compiled Font (PCF) (required for X11)
media-fonts/terminus-font:pcf-unicode-only - Remove non-unicode PCF fonts that could be problematic. See bug #520222.
media-fonts/terminus-font:psf - Install PC Screen Font (PSF) with unicode data (for linux console)
media-fonts/terminus-font:quote - Changes view of quotes: symmetric ` and ' instead of asymmetric one (see homepage)
media-fonts/terminus-font:ru-dv - Changes view of Russian letters 'de' and 've' (see homepage)
media-fonts/terminus-font:ru-g - Changes view of Russian letter 'ge' (see homepage)
media-fonts/terminus-font:ru-i - Changes view of Russian letter 'i' - not like Latin u, but like "mirrored" N (see homepage)
media-fonts/terminus-font:ru-k - Changes view of Russian letter 'k' (see homepage)
media-fonts/unifont:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/unifont:utils - Install unifont utilities
media-gfx/album:plugins - Install optional plugins
media-gfx/album:themes - Install optional themes
media-gfx/apngasm:7z - Enable support for 7zip compression
media-gfx/apngasm:zopfli - Enable support for Zopfli compression
media-gfx/asymptote:boehm-gc - Enables using the Boehm-Demers-Weiser conservative garbage collector
media-gfx/asymptote:offscreen - Enables off-screen rendering
media-gfx/asymptote:sigsegv - Enables using dev-libs/libsigsegv
media-gfx/blender:boost - Enable features depending on boost.
media-gfx/blender:bullet - Enable Bullet (Physics Engine).
media-gfx/blender:collada - Add support for Collada interchange format through media-libs/opencollada.
media-gfx/blender:colorio - Enable OpenColorIO color management through media-libs/opencolorio.
media-gfx/blender:cuda - Build cycles renderer with nVidia CUDA support.
media-gfx/blender:cycles - Build cycles renderer (requires media-libs/openimageio and dev-libs/boost).
media-gfx/blender:dds - Adds DDS textures support to Blender.
media-gfx/blender:doc - Build C and Python API documentation directly from the source code.
media-gfx/blender:elbeem - Adds surface fluid simulation to Blender using El'Beem library.
media-gfx/blender:game-engine - Adds Game Engine support to Blender.
media-gfx/blender:headless - Build without graphical support (renderfarm, server mode only).
media-gfx/blender:llvm - Enable features depending on llvm.
media-gfx/blender:man - Build and install man pages.
media-gfx/blender:ndof - Enable NDOF input devices (SpaceNavigator and friends).
media-gfx/blender:opencl - Allow OpenCL Graphics Acceleration. This may require extra graphics card drivers.
media-gfx/blender:openimageio - Enable OpenImageIO Support
media-gfx/blender:opennl - Enable use of Open Numerical Library
media-gfx/blender:opensubdiv - Add rendering support form OpenSubdiv from Dreamworks Animation through media-libs/opensubdiv.
media-gfx/blender:openvdb - Add GPU preview rendering. Only works with nVidia cards.
media-gfx/blender:osl - Add support for OpenShadingLanguage scripting.
media-gfx/blender:player - Build the Blender Player. THis requires the Game engine.
media-gfx/blender:redcode - This flag add support for RED CODE camera digital format (5K HD images *.r3d) - EXPERIMENTAL.
media-gfx/blender:test - Build the provided unit tests.
media-gfx/blender:valgrind - Add support for memory debugging using dev-util/valgrind
media-gfx/comix:rar - Pulls app-arch/unrar for rar file support
media-gfx/darktable:colord - Support color management using x11-misc/colord
media-gfx/darktable:flickr - Add support for uploading photos to flickr
media-gfx/darktable:geolocation - Enable geotagging support
media-gfx/darktable:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
media-gfx/darktable:opencl - Enable opencl support
media-gfx/darktable:pax_kernel - Triggers paxmarking of main darktable binary
media-gfx/digikam:addressbook - Enable akonadi contact integration
media-gfx/digikam:kipi - Enable support for media-plugins/kipi-plugins
media-gfx/digikam:lensfun - Enable support for media-libs/lensfun
media-gfx/digikam:marble - Enable support for geolocation using kde-apps/marble
media-gfx/digikam:mediaplayer - Enable support for media player using media-libs/qtav
media-gfx/digikam:panorama - Build the panorama plugin which requires media-gfx/hugin
media-gfx/digikam:semantic-desktop - Enable kde-frameworks/kfilemetadata support
media-gfx/eog-plugins:map - Enable world map display using media-libs/libchamplain
media-gfx/eog-plugins:picasa - Enable uploading to Google's Picasa Web Albums
media-gfx/exiv2:webready - Support reading metadata over the internet
media-gfx/fbida:X - Install the Motif based image viewer "ida"
media-gfx/fbida:fbcon - Install the framebuffer image viewer "fbi"
media-gfx/fbida:ghostscript - Install the framebuffer ghostscript viewer "fbgs"
media-gfx/fontforge:truetype-debugger - Enable truetype debugger in fontforge
media-gfx/fotowall:webcam - Enable webcam support
media-gfx/geeqie:ffmpegthumbnailer - Enable video thumbnail support with media-video/ffmpegthumbnailer
media-gfx/geeqie:gpu-accel - Enable GPU acceleration support - experimental
media-gfx/geeqie:gtk3 - Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
media-gfx/geeqie:map - Enable items map display - experimental
media-gfx/gimp:heif - Enable support for ISO/IEC 23008-12:2017 HEIF files
media-gfx/gimp:smp - Enable support for multiprocessors
media-gfx/gimp:vector-icons - Enable support for vector icons (experimental)
media-gfx/gnome-photos:flickr - Ensure runtime Flickr support
media-gfx/graphicsmagick:fpx - Enable FlashPix support with media-libs/libfpx
media-gfx/graphicsmagick:modules - Compile graphicsmagick with dynamically loadable modules
media-gfx/graphicsmagick:q16 - Set storage quantum size to 16 (~2*memory)
media-gfx/graphicsmagick:q32 - Set storage quantum size to 32 (~5*memory)
media-gfx/graphviz:X - Builds lefty front-end, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)
media-gfx/graphviz:devil - Enables DevIL output plugin -Tdevil
media-gfx/graphviz:gdk-pixbuf - Enables gdk-pixbuf2 plugin
media-gfx/graphviz:gtk - Enables gtk+ output plugin -Tgtk (needs cairo)
media-gfx/graphviz:gts - Enables support for gts
media-gfx/graphviz:lasi - Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo)
media-gfx/gthumb:colord - Use x11-misc/colord for color management
media-gfx/gthumb:http - Enable webservice integration through net-libs/libsoup
media-gfx/gthumb:json - Compile code that uses the libjson-glib library
media-gfx/gthumb:slideshow - Enable slideshow plugin
media-gfx/hugin:sift - automatically align images with media-gfx/autopano-sift-C
media-gfx/imagemagick:corefonts - Use media-fonts/corefonts which is required by some commands
media-gfx/imagemagick:fpx - Enable media-libs/libfpx support
media-gfx/imagemagick:hdri - Enable High Dynamic Range Images formats
media-gfx/imagemagick:heif - Enable support for ISO/IEC 23008-12:2017 HEIF/HEIC image format using media-libs/libheif
media-gfx/imagemagick:lqr - Enable experimental liquid rescale support using media-libs/liblqr
media-gfx/imagemagick:opencl - Enable OpenCL support
media-gfx/imagemagick:pango - Enable Pango support using x11-libs/pango
media-gfx/imagemagick:q32 - Set quantum depth value to 32
media-gfx/imagemagick:q8 - Set quantum depth value to 8
media-gfx/inkscape:cdr - Enable support for CorelDRAW Diagrams
media-gfx/inkscape:dia - pull in app-office/dia for dia import extension
media-gfx/inkscape:inkjar - Enable support for OpenOffice.org SVG jar files
media-gfx/inkscape:latex - pull in dependencies for LaTeX formulas
media-gfx/inkscape:visio - Enable support for Microsoft Visio Diagrams
media-gfx/inkscape:wpg - Enable support for WordPerfect Graphics
media-gfx/jpeg2ps:metric - Default to A4 paper size
media-gfx/kphotoalbum:kipi - Support for the KDE Image Plugin Interface
media-gfx/kphotoalbum:map - Enable map display support using kde-apps/libkgeomap
media-gfx/krita:color-management - Enable color management via media-libs/opencolorio
media-gfx/krita:heif - Enable support for ISO/IEC 23008-12:2017 HEIF/HEIC image format using media-libs/libheif
media-gfx/krita:qtmedia - Enable sound support for animations via dev-qt/qtmultimedia
media-gfx/krita:vc - Enable support for dev-libs/vc, could be a significant speed boost
media-gfx/librecad:3d - Require all 2D coordinates stored as 3D
media-gfx/librecad:tools - Build additional tool programs: tff2lff
media-gfx/luminance-hdr:fits - Enable support for the FITS format
media-gfx/nomacs:opencv - Build support for media-libs/opencv
media-gfx/nvidia-texture-tools:cg - Enable NVIDIA C graphics compiler toolkit plug-in
media-gfx/nvidia-texture-tools:cuda - Enable NVIDIA CUDA toolkit support
media-gfx/nvidia-texture-tools:glew - Enable support for The OpenGL Extension Wrangler Library (media-libs/glew)
media-gfx/openclipart:gzip - Compresses clip art using gzip
media-gfx/openexr_viewers:cg - Add support for nvidia's cg shaders
media-gfx/openvdb:abi3-compat - Disables newer features to maintain compatibility with ABI3. Enabled by default.
media-gfx/openvdb:abi4-compat - Disables newer features to maintain compatibility with ABI4. Enabled by default.
media-gfx/photoqt:devil - Support additional image formats using media-libs/devil
media-gfx/photoqt:exiv2 - Use media-gfx/exiv2 as optional dependency
media-gfx/photoqt:freeimage - Support additional iamge formats using media-libs/freeimage
media-gfx/pngcrush:system-libs - Use libpng and libz provided by system
media-gfx/potrace:metric - default to a4 paper size and metric measurement
media-gfx/povray:io-restrictions - POV-Ray's mechanism for control of I/O operations
media-gfx/povray:mkl - Enable support for Intel Vector Math Library, part of sci-libs/mkl
media-gfx/pqiv:archive - Enable support for images in archives and cbX comic book files
media-gfx/pstoedit:emf - Enable media-libs/libemf support
media-gfx/pstoedit:flash - Enable media-libs/ming SWF support
media-gfx/pstoedit:pptx - Enable support for generating PowerPoint pptx files
media-gfx/simple-scan:colord - Support color management using x11-misc/colord
media-gfx/ufraw:contrast - enable contrast setting option
media-gfx/ufraw:fits - Enable support for the FITS image format through sci-libs/cfitsio
media-gfx/ufraw:timezone - enable DST correction for file timestamps
media-gfx/xpaint:pgf - Support for loading PGF images
media-gfx/xsane:ocr - Enable support for Optical Character Recognition reader
media-libs/a52dec:djbfft - Prefer D.J. Bernstein's library for fourier transforms
media-libs/allegro:dumb - Enable media-libs/dumb module library support
media-libs/allegro:physfs - Enable physfs support
media-libs/allegro:vga - Enables the VGA graphics driver
media-libs/alsa-lib:alisp - Enable support for ALISP (ALSA LISP) interpreter for advanced features.
media-libs/alsa-lib:thread-safety - thread-safe API functions
media-libs/alure:dumb - Enable media-libs/dumb module library support
media-libs/alure:fluidsynth - Enables Fluidsynth MIDI software synthesis
media-libs/assimp:samples - Build viewer library
media-libs/assimp:tools - Build assimp tool binary
media-libs/aubio:double-precision - Compile in double precision mode.
media-libs/babl:cpu_flags_x86_f16c - Take advantage of CPU feature f16c
media-libs/cal3d:16bit-indices - Enables use of 16bit indices
media-libs/chromaprint:tools - Build and install fpcalc and fpcollect tools
media-libs/clutter:egl - Enable EGL backend.
media-libs/clutter:gtk - Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend
media-libs/cogl:gles2 - Enable OpenGL ES 2.0 support
media-libs/cogl:kms - Enable KMS support.
media-libs/cogl:pango - Build cogl-pango library for x11-libs/pango integration
media-libs/coin:qthelp - Build API documentation in QtHelp format
media-libs/coin:simage - Texture loading via media-libs/simage library
media-libs/devil:allegro - Add support for Allegro
media-libs/devil:nvtt - Add support for media-gfx/nvidia-texture-tools
media-libs/esdl:image - Enable image support
media-libs/faad2:digitalradio - Digital Radio Mondiale (warning: disables other decoders)
media-libs/flickcurl:raptor - Use media-libs/raptor for proper RDF serializing
media-libs/fontconfig-infinality:nyx - Additional style using croscorefonts
media-libs/freetype:adobe-cff - Use Adobe CFF as default font-renderer
media-libs/freetype:bindist - Disable ClearType support (see http://freetype.org/patents.html)
media-libs/freetype:bzip2 - Support bzip2 compressed PCF fonts.
media-libs/freetype:cleartype_hinting - New bytecode hinting mode for TrueType fonts that activates subpixel hinting (a.k.a. ClearType hinting) by default
media-libs/freetype:fontforge - Install internal headers required for TrueType debugger in media-gfx/fontforge (built with USE=truetype-debugger)
media-libs/freetype:harfbuzz - Use media-libs/harfbuzz for auto-hinting OpenType fonts. WARNING: may trigger circular dependencies!
media-libs/freetype:infinality - Enable infinality options for improved LCD filtering
media-libs/freetype:utils - Install utilities and examples from ft2demos
media-libs/freeverb3:audacious - Build Audacious plugin
media-libs/freeverb3:forcefpu - Disable assembly code
media-libs/freeverb3:plugdouble - Build plugins in double precision mode (default is float)
media-libs/gd:webp - Enable support for the webp format
media-libs/gegl:lensfun - Enable support for media-libs/lensfun.
media-libs/gegl:umfpack - Enable sparse solving via sci-libs/umfpack.
media-libs/giflib:rle - Build converters for RLE format (utah raster toolkit)
media-libs/gmtk:dconf - Enable support for gnome-base/dconf
media-libs/grilo:network - Enable network access for media discovery using net-libs/libsoup
media-libs/grilo:playlist - Enable support for playlists through dev-libs/totem-pl-parser
media-libs/gst-plugins-bad:bzip2 - Enable bzip2 encoder/decoder plugin
media-libs/gst-plugins-bad:egl - Enable EGL support
media-libs/gst-plugins-bad:gles2 - Enable GLES2 support
media-libs/gst-plugins-base:X - Enable ximagesink and xvimagesink plugins; build GLX platform support if USE=opengl is enabled; build x11 windowing system support if USE=egl is enabled
media-libs/gst-plugins-base:egl - Enable EGL platform support
media-libs/gst-plugins-base:gbm - Enable Graphics Buffer Manager based EGL windowing system support (requires egl and at least one of gles or opengl)
media-libs/gst-plugins-base:gles2 - Enable OpenGL library and plugin via GLESv2 API (requires egl)
media-libs/gst-plugins-base:ivorbis - Enable integer based vorbis decoder
media-libs/gst-plugins-base:opengl - Enable OpenGL library and plugin via desktop OpenGL API
media-libs/gst-plugins-base:pango - Enable pango GStreamer plugin
media-libs/gst-plugins-base:wayland - Enable Wayland EGL windowing system support (requires egl and at least one of gles2 or opengl)
media-libs/gstreamer:orc - Disable some PaX memory protections to allow plugins that use dev-lang/orc for runtime optimization to be used on hardened PaX systems
media-libs/gstreamer:unwind - Enable sys-libs/libunwind usage for better backtrace support in leaks tracer module
media-libs/harfbuzz:glib - Compile with GLib Unicode support
media-libs/harfbuzz:graphite - Use graphite to render complex non-Roman writing systems
media-libs/imlib2:shm - Use MIT shared memory support for X image transfer.
media-libs/leptonica:utils - Install command-line utilities
media-libs/libafterimage:shaping - Use MIT shaped X windows extention.
media-libs/libafterimage:shm - Use MIT shared memory extention for X image transfer.
media-libs/libass:harfbuzz - Enables OpenType shaping via media-libs/harfbuzz.
media-libs/libbdplus:aacs - Add support for decryption of AACS
media-libs/libbluray:aacs - Add support for decryption of AACS
media-libs/libbluray:bdplus - Use media-libs/libbdplus for BD+ decryption
media-libs/libbluray:java - Add support for BD-J
media-libs/libbluray:utils - Install command-line utilities and examples
media-libs/libcanberra:alsa - Enables ALSA sound driver.
media-libs/libcanberra:gstreamer - Enables gstreamer sound driver. Not useful when alsa or pulseaudio is available.
media-libs/libcanberra:gtk - Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
media-libs/libcanberra:gtk3 - Enables building of gtk+3 helper library, gtk+3 runtime sound effects and the canberra-gtk-play utility. To enable the gtk+3 sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
media-libs/libcanberra:pulseaudio - Enables PulseAudio sound driver that should be able to support positional event sounds. This is the preferred choice for best sound events experience and picked by default if compiled in and possible to use at runtime.
media-libs/libcanberra:sound - Install x11-themes/sound-theme-freedesktop to get sounds on Gnome and Xfce.
media-libs/libcanberra:tdb - Enables Trivial Database support for caching purposes.
media-libs/libextractor:apparmor - Enable apparmor support using sys-libs/libapparmor
media-libs/libextractor:archive - Enable archive support using app-arch/libarchive
media-libs/libextractor:gsf - Enable OLE2 (MS Office) plug-in support using gnome-extra/libgsf
media-libs/libextractor:magic - Enable magic support using sys-apps/file
media-libs/libextractor:midi - Enable MIDI support through media-libs/libsmf
media-libs/libggi:vis - Enables sparc vis support for libggi
media-libs/libgphoto2:serial - Enable serial port support
media-libs/libgpod:gtk - Enable ArtworkDB support
media-libs/liblastfm:fingerprint - Build the lastfm-fingerprint library
media-libs/libmp4v2:utils - Install command-line utilities
media-libs/libpagemaker:tools - Build command line file format conversion tools
media-libs/libpng:apng - support unofficial APNG (Animated PNG) spec
media-libs/libpostproc:pic - Force shared libraries to be built as PIC (this is slower).
media-libs/libprojectm:gles2 - Provide support for OpenGL ES 2 and 3
media-libs/libquicktime:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec)
media-libs/libraw:demosaic - Enable support for external interpolation algorithms
media-libs/libsdl:joystick - Control joystick support (disable at your own risk)
media-libs/libsdl:sound - Control audio support (disable at your own risk)
media-libs/libsdl:tslib - Build with tslib support for touchscreen devices
media-libs/libsdl:video - Control video support (disable at your own risk)
media-libs/libsdl2:gles - include OpenGL ES support
media-libs/libsdl2:haptic - Enable the haptic (force feedback) subsystem
media-libs/libsdl2:joystick - Control joystick support (disable at your own risk)
media-libs/libsdl2:kms - Build the KMSDRM video driver
media-libs/libsdl2:sound - Control audio support (disable at your own risk)
media-libs/libsdl2:tslib - Build with tslib support for touchscreen devices
media-libs/libsdl2:video - Control video support (disable at your own risk)
media-libs/libsdl2:vulkan - Enable Vulkan support
media-libs/libvisio:tools - Build conversion tools
media-libs/libvpx:highbitdepth - Enable 10 and 12 bit support for VP9.
media-libs/libvpx:postproc - Enable additional post processing filters
media-libs/libvpx:svc - Enable spatial-svc support (experimental)
media-libs/libwebp:experimental - Build with -DWEBP_EXPERIMENTAL_FEATURES
media-libs/libwebp:swap-16bit-csp - Enable byte swapping for 16 bit colorspace
media-libs/libzmf:tools - Build conversion tools
media-libs/lilv:dyn-manifest - Add LV2 Dynamic Manifest support. See http://lv2plug.in/ns/ext/dynmanifest/
media-libs/lv2:plugins - Enables examples plugins.
media-libs/mediastreamer:amr - Use of AMR Narrow Band codec plugin
media-libs/mediastreamer:filters - Enable compilation of filters
media-libs/mediastreamer:g726 - Support g726 codec
media-libs/mediastreamer:g729 - Use g726 codec plugin
media-libs/mediastreamer:ilbc - Use of iLBC (RFC3951) codec plugin
media-libs/mediastreamer:ntp-timestamp - Turn on NTP timestamping on received packet
media-libs/mediastreamer:ortp - Enable usage of net-libs/ortp
media-libs/mediastreamer:pcap - Enable usage of net-libs/libpcap
media-libs/mediastreamer:silk - Use silk (skype protocol) codec plugin
media-libs/mediastreamer:video - Enable video support
media-libs/mesa:classic - Build drivers based on the classic architecture.
media-libs/mesa:d3d9 - Enable Direct 3D9 API through Nine state tracker. Can be used together with patched wine.
media-libs/mesa:dri3 - Enable DRI3 support.
media-libs/mesa:egl - Enable EGL support.
media-libs/mesa:gallium - Build drivers based on Gallium3D, the new architecture for 3D graphics drivers.
media-libs/mesa:gbm - Enable the Graphics Buffer Manager for EGL on KMS.
media-libs/mesa:gles1 - Enable GLESv1 support.
media-libs/mesa:gles2 - Enable GLESv2 support.
media-libs/mesa:llvm - Enable LLVM backend for Gallium3D.
media-libs/mesa:opencl - Enable the Clover Gallium OpenCL state tracker.
media-libs/mesa:osmesa - Build the Mesa library for off-screen rendering.
media-libs/mesa:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
media-libs/mesa:pic - disable optimized assembly code that is not PIC friendly
media-libs/mesa:unwind - Add support for stack trace unwinding and function name resolution
media-libs/mesa:valgrind - Compile in valgrind memory hints
media-libs/mesa:vdpau - Enable the VDPAU acceleration interface for the Gallium3D Video Layer.
media-libs/mesa:vulkan - Enable Vulkan drivers
media-libs/mesa:wayland - Enable support for dev-libs/wayland
media-libs/mesa:xa - Enable the XA (X Acceleration) API for Gallium3D.
media-libs/mesa:xvmc - Enable the XvMC acceleration interface for the Gallium3D Video Layer.
media-libs/mlt:compressed-lumas - Compress the luma files in png.
media-libs/mlt:frei0r - Build the module for media-plugins/frei0r-plugins
media-libs/mlt:kdenlive - Build support for kde-apps/kdenlive
media-libs/mlt:lua - Build SWIG bindings for Lua
media-libs/mlt:melt - Build the melt commandline tool
media-libs/mlt:opencv - Build motion tracking module using media-libs/opencv
media-libs/mlt:python - Build SWIG bindings for Python
media-libs/mlt:rtaudio - Builds rtaudio consumer for native audio support on multiple platforms.
media-libs/mlt:ruby - Build SWIG bindings for Ruby
media-libs/netpbm:rle - Build converters for the RLE format (utah raster toolkit)
media-libs/opencv:contrib - Install user contributed scripts from opencv_contrib (Experimental!)
media-libs/opencv:contrib_cvv - CVV module requires Qt5
media-libs/opencv:contrib_dnn - DNN module contrib requires tiny dnn
media-libs/opencv:contrib_hdf - HDF module requires sci-libs/hdf5
media-libs/opencv:contrib_sfm - SFM module requires eigen, gflags, and glog
media-libs/opencv:contrib_xfeatures2d - Enables xfeatures2d and autodownload of samples in contrib
media-libs/opencv:cuda - Enable NVIDIA Cuda computations support (Experimental!)
media-libs/opencv:dnn_samples - Download dnn caffeemodel samples
media-libs/opencv:eigen - Enable usage of dev-cpp/eigen for computations
media-libs/opencv:gdal - Enable support for sci-libs/gdal library
media-libs/opencv:gflags - Use Google's C++ argument parsing library
media-libs/opencv:glog - Use Google's C++ loggin library
media-libs/opencv:opencl - Add support for OpenCL
media-libs/opencv:tesseract - Use Google's OCR Engine
media-libs/opencv:testprograms - Build and install programs for testing OpenCV (performance)
media-libs/opencv:vtk - Build new 3D visualization module viz based on sci-libs/vtk
media-libs/openh264:plugin - Install the Gecko Media Plugin (GMP) for use with Mozilla packages
media-libs/openh264:utils - Install the CLI encoder and decoder utilities
media-libs/openimageio:colorio - Use media-libs/opencolorio
media-libs/openimageio:cpu_flags_x86_avx512f - SIMD Optimization
media-libs/openimageio:cpu_flags_x86_f16c - SIMD Optimization
media-libs/openimageio:field3d - Use media-libs/Field3D
media-libs/openimageio:opencv - Use media-libs/opencv
media-libs/openimageio:ptex - Use media-libs/ptex
media-libs/opensubdiv:cuda - Enable NVIDIA CUDA Toolkit support through dev-util/nvidia-cuda-toolkit.
media-libs/opensubdiv:opencl - Enable OpenCL support through virtual/opencl.
media-libs/opensubdiv:ptex - Adds support for faster per-face texture mapping through media-libs/ptex.
media-libs/opensubdiv:tbb - Enable multithreading with the Intel Threads Building Blocks through dev-cpp/tbb.
media-libs/opus:ambisonics - Enable ambisonics support (experimental).
media-libs/opus:custom-modes - Build with custom-modes.
media-libs/opusfile:fixed-point - Enable fixed-point arithmetic operations
media-libs/opusfile:float - Enable floating point arithmetic operations
media-libs/opusfile:http - Enable http connections
media-libs/osl:cpu_flags_x86_avx512f - SIMD Optimization
media-libs/osl:cpu_flags_x86_f16c - SIMD Optimization
media-libs/osl:partio - Use media-libs/partio
media-libs/phonon:designer - Install plugin for dev-qt/designer
media-libs/phonon:vlc - Install VLC Phonon backend
media-libs/phonon-gstreamer:network - Enable network streaming support via libsoup
media-libs/portmidi:test-programs - Install various example programs
media-libs/qtav:gui - Build a video player gui
media-libs/quvi:json - Enable support for JSON output
media-libs/raptor:json - Enable support for JSON parsing
media-libs/sdif:ftruncate - Enables usage of ftruncate v. truncate
media-libs/sdl-mixer:fluidsynth - Use media-sound/fluidsynth for MIDI support
media-libs/sdl-mixer:midi - basic support for MIDI files
media-libs/sdl-mixer:mod - basic support for MOD files
media-libs/sdl-mixer:playtools - Install playwave and playmus tools (useful for testing)
media-libs/sdl-mixer:smpeg - Use media-libs/smpeg for MP3 support
media-libs/sdl-mixer:wav - support WAVE files
media-libs/sdl-sound:physfs - Enable physfs support
media-libs/sdl2-image:webp - support loading WEBP images
media-libs/sdl2-mixer:fluidsynth - Use media-sound/fluidsynth for MIDI support
media-libs/sdl2-mixer:midi - basic support for MIDI files
media-libs/sdl2-mixer:mod - basic support for MOD files
media-libs/sdl2-mixer:playtools - Install playwave and playmus tools (useful for testing)
media-libs/sdl2-mixer:smpeg - Use media-libs/smpeg for MP3 support
media-libs/sdl2-mixer:tremor - enable OGG Vorbis music via libtremor
media-libs/sdl2-mixer:wav - support WAVE files
media-libs/sge:image - enable sdl-image support
media-libs/spandsp:fixed-point - Enable fixed point support
media-libs/speex:utils - Enables speex commandline utilities (speexenc, speexdec).
media-libs/speex:vbr - Enable VBR support.
media-libs/taglib:boost - Use dev-libs/boost instead of GCC built-ins
media-libs/tiff:zstd - Enable zstd compression support.
media-libs/tremor:low-accuracy - enable 32bit only multiply operations
media-libs/urt:tools - Install tools
media-libs/vigra:valgrind - Enable valgrind in make check
media-libs/waffle:egl - Enable EGL support
media-libs/waffle:gbm - Enable support for the Generic Buffer Manager (gbm)
media-libs/waffle:wayland - Enable Wayland support
media-libs/x264:10bit - Set output bit depth to 10, this may not be compatible with all decoders
media-libs/x264:interlaced - enable interlaced encoding support, this can decrease encoding speed by up to 2%
media-libs/x264:opencl - Add support for OpenCL.
media-libs/x264:pic - disable optimized assembly code that is not PIC friendly
media-libs/x265:10bit - Add support for producing 10bits HEVC.
media-libs/x265:12bit - Add support for producing 12bits HEVC.
media-libs/x265:numa - Build with support for NUMA nodes.
media-libs/x265:pic - Disable optimized assembly code that is not PIC friendly
media-libs/x265:power8 - Enable support for Power 8 assembly optimizations.
media-libs/xine-lib:bluray - Enable playback of Blu-ray filesystems using media-libs/libbluray
media-libs/xine-lib:dxr3 - Enable support for DXR3 mpeg acceleration cards.
media-libs/xine-lib:flac - Build the media-libs/flac based FLAC demuxer and decoder. This flag is not needed for playing FLAC content, neither standalone nor in Ogg container (OggFLAC), but might have better support for exotic features like 24-bit samples or 96kHz sample rates.
media-libs/xine-lib:gtk - Build the gdkpixbuf-based image decoder plugin.
media-libs/xine-lib:imagemagick - Build the ImageMagick-based image decoder plugin.
media-libs/xine-lib:mad - Build the media-libs/libmad based mp3 decoder. This mp3 decoder has superior support compared to the one coming from FFmpeg that is used as a fallback. If you experience any bad behaviour with mp3 files (skipping, distorted sound) make sure you enabled this USE flag.
media-libs/xine-lib:mmap - Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback.
media-libs/xine-lib:truetype - Use media-libs/freetype for font rendering and media-libs/fontconfig for font discovery. Enabling this USE flag will allow OSD (such as subtitles) to use more advanced font and to more easily select which font to use. The support for TrueType fonts in xine-lib is still experimental, and might not be as good looking as the bitmap fonts used with this USE flag disabled.
media-libs/xine-lib:vdr - Build the VDR plugin
media-libs/xine-lib:vidix - Enable support for vidix video output.
media-libs/xine-lib:vis - Adds support for SIMD optimizations for UltraSPARC processors.
media-libs/xine-lib:vpx - Enable VP8 codec support via media-libs/libvpx.
media-libs/xine-lib:xvmc - Enable support for XVideo Motion Compensation (accelerated mpeg playback).
media-libs/xvid:pic - disable optimized assembly code that is not PIC friendly
media-plugins/alsa-plugins:arcam_av - Enables Arcam AV control plugin
media-plugins/alsa-plugins:mix - Enables upmix and vdownmix plugin
media-plugins/alsa-plugins:usb_stream - Enables usb_stream plugin
media-plugins/calf:experimental - Enable experimental features/plugins
media-plugins/calf:lv2 - Add support for Ladspa V2
media-plugins/frei0r-plugins:facedetect - Enables building of facedetect plugin, which depends on media-libs/opencv
media-plugins/frei0r-plugins:scale0tilt - Enables building of scale0tilt and vectorscope plugins, which depend on media-libs/gavl
media-plugins/gkrellmpc:threads - Use separate thread to init connection (unsafe)
media-plugins/grilo-plugins:chromaprint - Enable Chromaprint support
media-plugins/grilo-plugins:daap - Enable dmap support through net-libs/libdmapsharing
media-plugins/grilo-plugins:flickr - Enable Flickr support
media-plugins/grilo-plugins:freebox - Build support for viewing TV channels using Freebox
media-plugins/grilo-plugins:gnome-online-accounts - Enable net-libs/gnome-online-accounts support
media-plugins/grilo-plugins:subtitles - Enables support for subtitle from OpenSubtitles
media-plugins/grilo-plugins:thetvdb - Build support for thetvdb.com
media-plugins/grilo-plugins:tracker - Build support for content discovery using the app-misc/tracker indexer
media-plugins/grilo-plugins:vimeo - Build support for Vimeo content discovery using net-libs/libsoup and dev-libs/libgcrypt
media-plugins/grilo-plugins:youtube - Build support for YouTube content discovery using dev-libs/libgdata
media-plugins/gst-plugins-gl:libvisual - Enable visualization effects via media-libs/libvisual
media-plugins/gst-plugins-gtk:egl - Enable EGL platform usage
media-plugins/gst-plugins-gtk:gles2 - Enable gtkglsink OpenGL sink based on GLESv2 API
media-plugins/gst-plugins-gtk:opengl - Enable gtkglsink OpenGL sink based on desktop OpenGL API
media-plugins/gst-plugins-libav:libav - Use bundled ffmpeg to support systems using media-video/libav globally instead of media-video/ffmpeg
media-plugins/gst-plugins-meta:http - Enable http streaming via net-libs/libsoup
media-plugins/gst-plugins-meta:libvisual - Enable visualization effects via media-libs/libvisual
media-plugins/gst-plugins-meta:vpx - Enables vp8 codec support using libvpx, required to play some HTML5 videos
media-plugins/gst-plugins-vaapi:drm - Enable DRM renderer
media-plugins/gst-plugins-vaapi:egl - Enable EGL support
media-plugins/gst-plugins-vaapi:gles2 - Enable GLESv2 and GLESv3 support
media-plugins/hexter:gtk2 - Enable x11-libs/gtk+:2 based GUI
media-plugins/kipi-plugins:flashexport - Build the flash export plugin
media-plugins/kipi-plugins:mediawiki - Build the mediawiki export plugin
media-plugins/kipi-plugins:remotestorage - Build plugin for remote storage using network protocols such as FTP, SSH, SAMBA via kde-frameworks/kio
media-plugins/kipi-plugins:vkontakte - Build plugin for vkontakte.ru
media-plugins/mediastreamer-ilbc:20ms-frames - enable 20ms frame size (default is 30ms). Some VOIP providers such as Gizmo5 (aka Sipphone) require the codec to be compiled with the 30ms setting.
media-plugins/vdr-epgsearch:conflictcheckonly - install the "conflictcheckonly" vdr-plugin
media-plugins/vdr-epgsearch:epgsearchonly - install the "epgsearchonly" vdr-plugin
media-plugins/vdr-epgsearch:quicksearch - install the "quicksearch" vdr-plugin
media-plugins/vdr-epgsearch:tre - Add support for unlimited fuzzy searching with help of dev-libs/tre library
media-plugins/vdr-streamdev:client - Compile the VDR plugin vdr-streamdev-client that acts like a dvb-budget card
media-plugins/vdr-streamdev:server - Compile the VDR plugin vdr-streamdev-server that allows remote systems to access the DVB cards used for the local VDR
media-radio/ax25-tools:X - Enable some X based configuration tools.
media-radio/fldigi:hamlib - Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio in use
media-radio/tucnak:hamlib - Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio
media-radio/unixcw:ncurses - Enables building the curses based morse code tutor program 'cwcp'.
media-radio/xastir:festival - Enable text to speech synthesizer
media-radio/xastir:gdal - Support for some further map formats
media-radio/xastir:geotiff - Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images
media-sound/abcde:id3tag - Support ID3, ID3v2 tagging of audio files
media-sound/abcde:mac - Enable support for Monkey's Audio files
media-sound/abcde:normalize - Add support for normalizing audio file volume levels
media-sound/abcde:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/abcm2ps:pango - Use the pango library to render fonts with non-latin characters
media-sound/alsa-utils:bat - install basic audio tester (BAT) util
media-sound/alsa-utils:libsamplerate - install utils that use libsamplerate (e.g. alsaloop)
media-sound/alsa-utils:ncurses - install utils that use ncurses (e.g. alsamixer)
media-sound/alsaplayer:id3tag - Enables ID3 tagging with id3tag library
media-sound/amsynth:dssi - Enable support for DSSI Soft Synth Interface
media-sound/apulse:sdk - Install PulseAudio headers and pkg-config files. Be aware apulse is not a full PulseAudio replacement by design and some functionality may be missing.
media-sound/aqualung:ifp - Enable support for iRiver iFP portable audio players
media-sound/aqualung:lua - Enable support for programmable title formatting with dev-lang/lua
media-sound/aqualung:mac - Enable support for decoding Monkey's Audio files
media-sound/aqualung:podcast - Enable podcast support
media-sound/aqualung:systray - Enable system tray support
media-sound/ario:idle - Enable experimental support for MPD's idle command to reduce bandwidth and cpu usage, requires MPD 0.14
media-sound/ario:scrobbler - Enable audioscrobbler/last.fm support net-libs/libsoup
media-sound/asunder:mac - Support for creation of Monkey's Audio files (APE)
media-sound/audacity:id3tag - Enables ID3 tagging with id3tag library
media-sound/audacity:lv2 - Add support for Ladspa V2
media-sound/audacity:midi - Enables MIDI support
media-sound/audacity:portmixer - Enable the internal portmixer feature
media-sound/audacity:sbsms - Enables sbsms library support for slower, more accurate pitch and tempo changing
media-sound/audacity:soundtouch - Enables soundtouch library support for pitch and tempo changing
media-sound/audacity:twolame - Enables twolame support (MPEG Audio Layer 2 encoder)
media-sound/audacity:vamp - Enables vamp plugins support (Audio analysing plugins)
media-sound/audacity:vst - Enable VST plugin support
media-sound/cantata:cdio - Use dev-libs/libcdio-paranoia for CD support (instead of cdparanoia)
media-sound/cantata:http-server - Enable internal HTTP server to play non-MPD files
media-sound/cantata:replaygain - Enable ReplayGain support, for relative volume adjustments
media-sound/cantata:streaming - Enable playback of MPD HTTP streams using LibVLC (media-video/vlc)
media-sound/clementine:box - Enable filesharing via Box.com
media-sound/clementine:dropbox - Enable Dropbox support
media-sound/clementine:googledrive - Enable Google Drive support
media-sound/clementine:lastfm - Use liblastfm for fetching song info, scrobbling and radio streams
media-sound/clementine:moodbar - Enable moodbar support
media-sound/clementine:projectm - Build with ProjectM visualization
media-sound/clementine:seafile - Enable support for seafile: a file sync service
media-sound/clementine:skydrive - Enable Skydrive support
media-sound/clementine:wiimote - Enable support for Wii remote
media-sound/cmus:cdio - use libcdio for CD support
media-sound/cmus:cue - enable CUE sheet parsing
media-sound/cmus:discid - enable reading the ID of the inserted CD
media-sound/cmus:pidgin - install support script for net-im/pidgin
media-sound/cmus:tremor - use libivorbis from media-libs/tremor instead of media-libs/libvorbis
media-sound/darkice:aacplus - AAC+ encoding via media-libs/libaacplus
media-sound/darkice:twolame - Build with twolame support
media-sound/dir2ogg:mac - Add support for decoding Monkey's Audio files
media-sound/dir2ogg:wma - Add support for wma files through mplayer
media-sound/drumstick:fluidsynth - Enable support for media-sound/fluidsynth
media-sound/easytag:nautilus - Build gnome-base/nautilus extension
media-sound/ecasound:lv2 - Add support for Ladspa V2
media-sound/ecasound:oil - Use dev-libs/liboil for inner loop optimizations
media-sound/fapg:xspf - Enable support for saving XSPF playlists.
media-sound/gimmix:cover - Enable cover art fetching
media-sound/gimmix:lyrics - Enable lyric fetching
media-sound/gmpc:unique - Enable single instance support using dev-libs/libunique
media-sound/gmpc:xspf - Enable support for reading and saving XSPF playlists
media-sound/gmusicbrowser:extras - Install some extra deps for plugins (ex. Titlebar)
media-sound/herrie:http - Enable http streaming
media-sound/herrie:xspf - Enable support for reading and saving XSPF playlists
media-sound/hydrogen:archive - Use libarchive instead of libtar
media-sound/hydrogen:portmidi - Add portmidi support
media-sound/jack-audio-connection-kit:coreaudio - Build the CoreAudio driver on Mac OS X systems
media-sound/jack-audio-connection-kit:pam - Add basic realtime configuration via sys-auth/realtime-base
media-sound/kid3:acoustid - Enable support for acoustic fingerprinting plugin using (media-libs/chromaprint)
media-sound/lame:frontend - Build and install the 'lame' executable frontend to lame libraries.
media-sound/lame:mp3rtp - Build the mp3-to-RTP streaming utility. **UNSUPPORTED**
media-sound/lilypond:guile2 - Enable experimental support for Guile 2
media-sound/lyvi:mpris - Enable MPRIS support
media-sound/mangler:espeak - Text to speech engine
media-sound/mangler:g15 - Logitech g15 lcd support
media-sound/mixxx:hid - Enable HID controller support
media-sound/mixxx:shout - Enable broadcasting support via media-libs/libshout
media-sound/moc:cache - Enable tags caching support
media-sound/moc:magic - Use libmagic to determine mimetypes
media-sound/moc:sid - Build with SID (Commodore 64 Audio) support
media-sound/moc:tremor - Build vorbis support using an integer implementation of the vorbis library (media-libs/tremor)
media-sound/mp3blaster:sid - Build with SID (Commodore 64 Audio) support
media-sound/mp3splt-gtk:audacious - Include media-sound/audacious support
media-sound/mpd:adplug - Enable the AdPlug decoder plugin
media-sound/mpd:cdio - Use libcdio for ISO9660 parsing support
media-sound/mpd:chromaprint - Enable ChromaPrint / AcoustID support
media-sound/mpd:cue - Enable CUE sheet support
media-sound/mpd:curl - Support for web stream listening
media-sound/mpd:eventfd - Use the eventfd function in MPD's event loop
media-sound/mpd:faad - Use external faad library for AAC decoding
media-sound/mpd:fifo - Support writing audio to a FIFO
media-sound/mpd:fluidsynth - Enables Fluidsynth MIDI software synthesis (discouraged)
media-sound/mpd:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-sound/mpd:id3tag - Support for ID3 tags
media-sound/mpd:inotify - Use the Linux kernel inotify subsystem to notice changes to mpd music library
media-sound/mpd:lame - Support for MP3 streaming via Icecast2
media-sound/mpd:libmpdclient - Enable support for remote mpd databases
media-sound/mpd:libsoxr - Enable the libsoxr resampler
media-sound/mpd:mpg123 - Enable support for mp3 decoding over media-sound/mpg123
media-sound/mpd:network - Enables network streaming support
media-sound/mpd:nfs - Enable support for the Network File System
media-sound/mpd:pipe - Support writing audio to a pipe
media-sound/mpd:qobuz - Build plugin to access qobuz
media-sound/mpd:recorder - Enables output plugin for recording radio streams
media-sound/mpd:sid - Build with SID (Commodore 64 Audio) support
media-sound/mpd:signalfd - Use the signalfd function in MPD's event loop
media-sound/mpd:soundcloud - Build plugin to access soundcloud
media-sound/mpd:systemd - Enable support for systemd socket activation
media-sound/mpd:tidal - Build plugin to access tidal
media-sound/mpd:twolame - Support twolame MPEG-2 encoding
media-sound/mpd:webdav - Enable using music from a WebDAV share
media-sound/mpd:wildmidi - Enable MIDI support via wildmidi
media-sound/mpfc:wav - Enable wav audio codec support
media-sound/mpg123:int-quality - Use rounding instead of fast truncation for integer output, where possible
media-sound/ncmpc:artist-screen - Enable artist screen
media-sound/ncmpc:async-connect - Enable asynchronous connect
media-sound/ncmpc:chat-screen - Enable the chat screen
media-sound/ncmpc:help-screen - Enable the help screen
media-sound/ncmpc:key-screen - Enable key editor screen
media-sound/ncmpc:lyrics-screen - Enable lyrics screen
media-sound/ncmpc:mouse - Enable curses getmouse support
media-sound/ncmpc:outputs-screen - Enable the outputs screen
media-sound/ncmpc:search-screen - Enable search screen
media-sound/ncmpc:song-screen - Enable song viewer screen
media-sound/ncmpc:tcp - Enable TCP support
media-sound/ncmpcpp:clock - Enable clock screen
media-sound/ncmpcpp:outputs - Enable outputs screen
media-sound/ncmpcpp:visualizer - Enable visualizer screen with sound wave/frequency spectrum modes
media-sound/patchage:jack-dbus - Use Jack via D-Bus instead of libjack
media-sound/patchage:session - Include experimental Jack session management (save/restore) support
media-sound/pragha:glyr - Enable music metadata searchengine support using media-libs/glyr
media-sound/pragha:grilo - Play songs on DLNA servers using media-libs/grilo
media-sound/pragha:keybinder - Enable shortcut support using dev-libs/keybinder
media-sound/pragha:koel - Append music on Koel server
media-sound/pragha:lastfm - Enable last.fm support using media-libs/libclastfm
media-sound/pragha:peas - Enable various plugins that will pull in dev-libs/libpeas as a dependency
media-sound/pragha:playlist - Enable enhanced playlist support using dev-libs/totem-pl-parser
media-sound/pragha:rygel - Share music on DLNA using net-misc/rygel
media-sound/pragha:soup - Search metadata on AcoustID and radios on TuneIn using net-libs/libsoup
media-sound/pulseaudio:X - Build the X11 publish module to export PulseAudio information through X11 protocol for clients to make use. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
media-sound/pulseaudio:alsa-plugin - Request installing media-plugins/alsa-plugins with PulseAudio plugin enabled. This ensures that clients supporting ALSA only will use PulseAudio.
media-sound/pulseaudio:asyncns - Use libasyncns for asynchronous name resolution.
media-sound/pulseaudio:doc - Build the doxygen-described API documentation.
media-sound/pulseaudio:equalizer - Enable the equalizer module (requires sci-libs/fftw).
media-sound/pulseaudio:gconf - Ensure gnome-base/gconf is present for pulseaudio GConf to GSettings module automatic migration (keeping the user configuration)
media-sound/pulseaudio:gdbm - Use sys-libs/gdbm to store PulseAudio databases. Recommended for desktop usage. This flag causes the whole package to be licensed under GPL-2 or later.
media-sound/pulseaudio:glib - Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs. Build the GSettings PA module.
media-sound/pulseaudio:gnome - Use GConf to store user preferences on streams and so on. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
media-sound/pulseaudio:native-headset - Build with native HSP backend for bluez 5.
media-sound/pulseaudio:ofono-headset - Build with oFono HFP backend for bluez 5, requires net-misc/ofono.
media-sound/pulseaudio:oss - Enable OSS sink/source (output/input). Deprecated, upstream does not support this on systems where other sink/source systems are available (i.e.: Linux). The padsp wrapper is now always build if the system supports OSS at all.
media-sound/pulseaudio:realtime - Makes PulseAudio use RealtimeKit (sys-auth/rtkit) to get real-time priority while running.
media-sound/pulseaudio:ssl - Use dev-libs/openssl to provide support for RAOP (AirPort) streaming.
media-sound/pulseaudio:system-wide - Allow preparation and installation of the system-wide init script for PulseAudio. Since this support is only supported for embedded situations, do not enable without reading the upstream instructions at https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ .
media-sound/pulseaudio:systemd - Build with sys-apps/systemd support to replace standalone ConsoleKit.
media-sound/pulseaudio:webrtc-aec - Uses the webrtc.org AudioProcessing library for enhancing VoIP calls greatly in applications that support it by performing acoustic echo cancellation, analog gain control, noise suppression and other processing.
media-sound/pulseeffects:bs2b - Enable use of media-libs/libbs2b
media-sound/pulseeffects:calf - Enable use of media-plugins/calf for adding various FX
media-sound/pulseeffects:mda-lv2 - Enable use of media-plugins/mda-lv2 for the loudness FX
media-sound/pulseeffects:rubberband - Enable usse of media-libs/rubberband for the pitch shifting FX
media-sound/qmmp:analyzer - Enable visual analyzer
media-sound/qmmp:archive - Enable archiving plugin via app-arch/libarchive.
media-sound/qmmp:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-sound/qmmp:cover - Enable album cover support
media-sound/qmmp:crossfade - Enable crossfade effect when switching tracks
media-sound/qmmp:cue - enable CUE sheet parsing
media-sound/qmmp:dbus - Enable DBus notifiications and MPRIS support
media-sound/qmmp:enca - Detects the character encoding automatically
media-sound/qmmp:game - Enable Game music support
media-sound/qmmp:gnome - Enable Gnome hotkey support (requires Qt5DBus)
media-sound/qmmp:lyrics - Fetch track lyrics from the web
media-sound/qmmp:midi - Enable midi support using wildmidi library
media-sound/qmmp:notifier - Enable qmmps' notifier system
media-sound/qmmp:projectm - Enable projectm music visualization plugin
media-sound/qmmp:qsui - Enable QMMP simple UI
media-sound/qmmp:qtmedia - Enable playback via dev-qt/qtmultimedia
media-sound/qmmp:scrobbler - Enable audioscrobbler/last.fm support
media-sound/qmmp:shout - Enable shoutcast plug-in via media-libs/libshout.
media-sound/qmmp:sid - Build with SID (Commodore 64 Audio) support
media-sound/qmmp:sndfile - Enable wav playback support via media-libs/libsndfile
media-sound/qmmp:soxr - Use the SoX resampling library
media-sound/qmmp:stereo - Enable stereo effect
media-sound/qmmp:tray - Build tray icon
media-sound/rhythmbox:daap - Build the local network music sharing plugin which uses the DAAP protocol using net-libs/libdmapsharing
media-sound/shntool:alac - Add support for Apple Lossless Audio Codec files
media-sound/shntool:mac - Add support for Monkey's Audio files
media-sound/shntool:shorten - Add support for the shorten audio compressor
media-sound/sonata:lyrics - Support for lyrics fetching
media-sound/sonata:trayicon - Enable support for trayicon
media-sound/sox:amr - Enables Adaptive Multi-Rate Audio support
media-sound/sox:id3tag - Enables ID3 tagging with id3tag library
media-sound/sox:twolame - Enables twolame support (MPEG Audio Layer 2 encoder)
media-sound/split2flac:enca - Try to guess the charset using enca
media-sound/split2flac:flake - Add support for Flake, alternative FLAC encoder
media-sound/split2flac:mac - Add support for Monkey's Audio files
media-sound/split2flac:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/umurmur:shm - Enable shared memory support
media-sound/upmpdcli:thirdparty - Enable streaming from Qobuz and Tidal external services
media-sound/vimpc:boost - Use boost instead of C++11 libraries
media-sound/vorbis-tools:kate - Adds support for Ogg Kate subtitles via libkate.
media-sound/vorbis-tools:ogg123 - Build ogg123 player, needs libao and curl
media-sound/wildmidi:player - Install the wildmidi player
media-sound/xmms2:airplay - Support for airplay format
media-sound/xmms2:asf - Support for Monkey's Audio (APE) format with help of bundled libasf
media-sound/xmms2:fluidsynth - Enable fluidsynth support (MIDI)
media-sound/xmms2:gvfs - Transport for glibs virtual filesystem
media-sound/xmms2:ices - Icecast source output plugin
media-sound/xmms2:mac - Support for Monkey's Audio (APE) format with help of media-sound/mac
media-sound/xmms2:mlib-update - Enable building of xmms2-mlib-updater client
media-sound/xmms2:ofa - Support for Open Fingerprint Architecture (OFA)
media-sound/xmms2:phonehome - This client sends anonymous usage-statistics to the xmms2
media-sound/xmms2:server - Build xmms2 player daemon (otherwise only clients are built)
media-sound/xmms2:sid - Support for C64 SID
media-sound/xmms2:valgrind - Run unit tests under valgrind.
media-sound/xmms2:vocoder - Phase vocoder effect plugin
media-sound/xmms2:xml - Enable support for various XML based playlists and sources: RSS, XSPF
media-sound/xnoise:lastfm - Enable support for lastfm cover art fetching and scrobbling
media-sound/xnoise:lyrics - Enable support for lyrics fetching
media-sound/xwax:alsa - Adds support for ALSA audio input/output.
media-sound/xwax:cdda - Sets runtime dependencies to support decoding audio from a compact disc.
media-sound/xwax:fallback - Sets runtime dependencies to support decoding "other" audio files.
media-sound/xwax:jack - Adds support for audio input/output via the JACK Audio Connection Kit.
media-sound/xwax:mp3 - Sets runtime dependencies to support decoding MP3 audio.
media-sound/xwax:oss - Adds support for OSS (open sound system) audio input/output.
media-tv/gentoo-vdr-scripts:nvram - Add support for using nvram-wakeup to set wakeup time in bios
media-tv/kodi:airplay - enable AirPlay support
media-tv/kodi:bluray - Enable playback of Blu-ray filesystems
media-tv/kodi:cec - Enable support for HDMI-CEC devices via libcec
media-tv/kodi:dvd - Enable optical (CD/DVD drive) support
media-tv/kodi:gbm - Use the Graphics Buffer Manager for EGL on KMS.
media-tv/kodi:gles - Enable support for GLES
media-tv/kodi:libusb - Use virtual/libusb for usb device hotplug support. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.
media-tv/kodi:lirc - Enable support for controlling Totem with a remote control using app-misc/lirc
media-tv/kodi:mariadb - Add MariaDB support
media-tv/kodi:nfs - Enable NFS client support
media-tv/kodi:nonfree - Enable non-free components
media-tv/kodi:sftp - Support browsing files over SFTP
media-tv/kodi:system-ffmpeg - Use system ffmpeg instead of the bundled one
media-tv/kodi:udev - Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.
media-tv/kodi:webserver - Enable internal webserver
media-tv/kodi:xslt - Enable XSLT support using dev-libs/libxslt
media-tv/linuxtv-dvb-apps:alevt - Build videotext decoder
media-tv/v4l-dvb-saa716x:firmware - Install firmware
media-tv/xmltv:ar - Argentina tv listing grabber
media-tv/xmltv:ch - Switzerland bluewin tv listing grabber
media-tv/xmltv:ch_search - Grabber for Switzerland
media-tv/xmltv:dk - Denmark tv listing grabber
media-tv/xmltv:dtvla - Latin America digital tv listing grabber
media-tv/xmltv:ee - Estonia tv listing grabber
media-tv/xmltv:es_laguiatv - Spain alternative grabber
media-tv/xmltv:es_miguiatv - Spain alternative grabber
media-tv/xmltv:eu_dotmedia - Grabber for Europe (xmltv.se / dotmedia)
media-tv/xmltv:eu_epg - EPG grabber for some European countries.
media-tv/xmltv:fi - Finland tv listing grabber
media-tv/xmltv:fi_sv - Grabber for Finland (Swedish)
media-tv/xmltv:fr - France tv listing grabber
media-tv/xmltv:fr_kazer - France (Kazer) tv listing grabber
media-tv/xmltv:hr - Croatia tv listing grabber
media-tv/xmltv:huro - Hungarian tv listing grabber
media-tv/xmltv:il - Israel tv listing grabber
media-tv/xmltv:in - India tv listing grabber
media-tv/xmltv:is - Iceland tv listing grabber
media-tv/xmltv:it - Italy tv listing grabber
media-tv/xmltv:na_dd - North America tv listing grabber
media-tv/xmltv:na_dtv - North America Direct TV grabber
media-tv/xmltv:na_icons - option for na_dd to download icons
media-tv/xmltv:na_tvmedia - Grabber for North America (TVMedia)
media-tv/xmltv:nl - Netherlands tv listing grabber
media-tv/xmltv:no_gf - Norway Gfeed tv listing grabber
media-tv/xmltv:pt - Portugal tv listing grabber
media-tv/xmltv:pt_meo - Grabber for Portugal (MEO)
media-tv/xmltv:re - Reunion Island (France) tv listing grabber
media-tv/xmltv:se_swedb - Sweden tv listing grabber
media-tv/xmltv:se_tvzon - Sweden (tvzon.se) tv listing grabber
media-tv/xmltv:tr - Turkey (Digiturk) tv listing grabber
media-tv/xmltv:tv_check - enable GUI checking
media-tv/xmltv:tv_combiner - enable grabbers combiner
media-tv/xmltv:tv_pick_cgi - enable CGI support
media-tv/xmltv:uk_bleb - Britain tv listing grabber
media-tv/xmltv:uk_rt - Britain alternative tv listing grabber
media-tv/xmltv:uk_tvguide - UK and Ireland tv listing grabber using TV Guide website
media-tv/xmltv:za - South Africa tv listing grabber
media-tv/xmltv:zz_sdjson - Grabber for schedulesDirect.org SD-JSON service (many countries)
media-video/aegisub:uchardet - Enable charset discovery via app-i18n/uchardet
media-video/chaplin:transcode - Enable DVD ripping and transcoding
media-video/clive:clipboard - Support reading from X clipboard
media-video/clive:pager - Support pager!?
media-video/clive:password - Support password controlled sites
media-video/dvdrip:fping - Enables fping support for cluster rendering
media-video/dvdrip:subtitles - Enables support for subtitle ripping
media-video/ffdiaporama:openclipart - Support openclipart database
media-video/ffdiaporama:texturemate - Install extra backgrounds
media-video/ffmpeg:amr - Enables Adaptive Multi-Rate Audio support
media-video/ffmpeg:amrenc - Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc.
media-video/ffmpeg:appkit - Enables Apple AppKit framework
media-video/ffmpeg:armv5te - Enables optimizations for armv5te processors.
media-video/ffmpeg:armv6 - Enables optimizations for armv6 processors.
media-video/ffmpeg:armv6t2 - Enables optimizations for armv6t2 processors.
media-video/ffmpeg:armvfp - Enables VFP optimizations for ARM processors.
media-video/ffmpeg:bluray - Enable playback of Blu-ray filesystems
media-video/ffmpeg:bs2b - Enables media-libs/libbs2b based Bauer stereo-to-binaural filter.
media-video/ffmpeg:cdio - Enables audio CD grabbing with dev-libs/libcdio.
media-video/ffmpeg:chromaprint - Enables audio fingerprinting support with media-libs/chromaprint.
media-video/ffmpeg:chromium - Builds libffmpeg.so to enable media playback in Chromium-based browsers like Opera and Vivaldi.
media-video/ffmpeg:codec2 - Enables codec2 low bit rate speech codec support via media-libs/codec2.
media-video/ffmpeg:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
media-video/ffmpeg:ebur128 - Enables EBU R128 loudness normalization filter via media-libs/libebur128
media-video/ffmpeg:fdk - Use external fdk-aac library for AAC encoding
media-video/ffmpeg:flite - Adds a text-to-speech filter based on app-accessibility/flite.
media-video/ffmpeg:frei0r - Enable frei0r wrapping in libavfilter
media-video/ffmpeg:fribidi - Enables fribidi support in the drawtext filter.
media-video/ffmpeg:gcrypt - Enables gcrypt support: Needed for rtmp(t)e support if openssl, librtmp or gmp is not used.
media-video/ffmpeg:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-video/ffmpeg:gpl - Build GPL code. Should be enabled unless you require LGPL binaries.
media-video/ffmpeg:hardcoded-tables - Use pre-calculated tables rather than calculating them on the fly.
media-video/ffmpeg:iec61883 - Support for FireWire DV/HDV input device using media-libs/libiec61883.
media-video/ffmpeg:kvazaar - Enables media-libs/kvazaar based HEVC encoder.
media-video/ffmpeg:libaom - Enables media-libs/libaom based AV1 codec support.
media-video/ffmpeg:libdrm - Enables x11-libs/libdrm support for better screen grabbing and hardware accelerated codecs.
media-video/ffmpeg:libilbc - Enables iLBC de/encoding via media-libs/libilbc.
media-video/ffmpeg:librtmp - Enables Real Time Messaging Protocol using librtmp (media-video/rtmpdump) in addition to FFmpeg's native implementation.
media-video/ffmpeg:libsoxr - Enables audio resampling through media-libs/soxr.
media-video/ffmpeg:libv4l - Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library.
media-video/ffmpeg:lv2 - Enables lv2 audio filter wrapper.
media-video/ffmpeg:mipsdspr1 - Enables MIPS DSP ASE R1 optimizations.
media-video/ffmpeg:mipsdspr2 - Enables MIPS DSP ASE R2 optimizations.
media-video/ffmpeg:mipsfpu - Enables floating point MIPS optimizations.
media-video/ffmpeg:mmal - Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi.
media-video/ffmpeg:network - Enables network streaming support
media-video/ffmpeg:nvenc - Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards.
media-video/ffmpeg:opencl - Enable OpenCL support
media-video/ffmpeg:openh264 - Enables H.264 encoding suppoprt via media-libs/openh264.
media-video/ffmpeg:openssl - Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS).
media-video/ffmpeg:pic - Force shared libraries to be built as PIC (this is slower)
media-video/ffmpeg:postproc - Build and install libpostproc.
media-video/ffmpeg:rubberband - Adds time-stretching and pitch-shifting audio filter based on media-libs/rubberband.
media-video/ffmpeg:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/ffmpeg:snappy - Enable app-arch/snappy support. Required for e.g. Vidvox Hap encoder.
media-video/ffmpeg:sofalizer - Enables Sofalizer filter
media-video/ffmpeg:srt - Enable support for Secure Reliable Transport (SRT) via net-libs/srt
media-video/ffmpeg:ssh - Enable SSH/sftp support via net-libs/libssh.
media-video/ffmpeg:twolame - Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder.
media-video/ffmpeg:vpx - Enables vp8 codec support using libvpx: Decoding vp8 does not require this to be enabled but libvpx can also be used for decoding; encoding vp8 requires this useflag to be enabled though.
media-video/ffmpeg:x265 - Enables HEVC encoding with media-libs/x265.
media-video/ffmpeg:zeromq - Enables net-libs/zeromq support with the zmq/azmq filters.
media-video/ffmpeg:zimg - Enables media-libs/zimg based scale filter.
media-video/ffmpeg:zvbi - Enables media-libs/zvbi based teletext decoder.
media-video/ffmpeg2theora:kate - Adds support for Ogg Kate subtitles via libkate.
media-video/kino:gpac - Enable GPAC support when exporting to 3GPP format
media-video/kmplayer:npp - Compile the npp backend that plays xembed style browser plugins.
media-video/libav:aac - Use external vo-aacenc library for AAC encoding
media-video/libav:amr - Enable Adaptive Multi-Rate Audio support
media-video/libav:armv5te - Enable optimizations for armv5te processors
media-video/libav:armv6 - Enable optimizations for armv6 processors
media-video/libav:armv6t2 - Enable optimizations for armv6t2 processors
media-video/libav:armvfp - Enable VFP optimizations for ARM processors
media-video/libav:bs2b - Enable media-libs/libbs2b based Bauer stereo-to-binaural audio filter
media-video/libav:cdio - Enable audio CD grabbing with dev-libs/libcdio.
media-video/libav:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs).
media-video/libav:faac - Use external faac library for AAC encoding
media-video/libav:fdk - Use external fdk-aac library for AAC encoding and decoding
media-video/libav:frei0r - Enable frei0r wrapping in libavfilter
media-video/libav:gpl - Build all GPL licensed code. Without this flag set the package is build under LGPL license.
media-video/libav:hardcoded-tables - Use pre-calculated tables rather than calculating them on the fly.
media-video/libav:network - Enable network streaming support.
media-video/libav:nvidia - Enable nvidia video codec hardware acceleration support.
media-video/libav:openssl - Prefer dev-libs/openssl over net-libs/gnutls to provide SSL/TLS support (notice: the resulting binaries are unredistributable).
media-video/libav:opus - Use the external opus library for encoding and decoding.
media-video/libav:pic - Force shared libraries to be built as PIC (this is slower).
media-video/libav:pulseaudio - Enable pulseaudio input support.
media-video/libav:rtmp - Enable Real Time Messaging Protocol using librtmp instead the native implementation.
media-video/libav:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/libav:ssl - Enable SSL/TLS support using dev-libs/openssl or net-libs/gnutls.
media-video/libav:tools - Build and install small tools like aviocat, cws2fws, graph2dot, ismindex, qt-faststart.
media-video/libav:twolame - Enable MP2 encoding via media-sound/twolame as an alternative to the internal encoder
media-video/libav:vpx - Enable vp8 encoding support using media-libs/libvpx.
media-video/libav:x265 - Enable HEVC encoding with media-libs/x265.
media-video/minitube:download - Enable support for downloading YouTube videos
media-video/mjpegtools:sdlgfx - Enables y4mhist to display a graphical histogram
media-video/motion:mmal - Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi.
media-video/mplayer:bl - Blinkenlights video output
media-video/mplayer:bluray - Enable playback of Blu-ray filesystems
media-video/mplayer:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-video/mplayer:cdio - Use libcdio for CD support (instead of cdparanoia)
media-video/mplayer:cpudetection - Enables runtime CPU detection (useful for binpkgs, compatibility on other CPUs)
media-video/mplayer:dvdnav - Use forked libdvdnav, navigate menus in GUIs
media-video/mplayer:enca - Enables support for charset discovery and conversion
media-video/mplayer:faac - Use external faac library for AAC encoding
media-video/mplayer:faad - Use external faad library for AAC decoding
media-video/mplayer:libmpeg2 - Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg.
media-video/mplayer:live - Enables live.com streaming media support
media-video/mplayer:md5sum - Enables md5sum video output
media-video/mplayer:mng - MNG input support
media-video/mplayer:network - Enables network streaming support
media-video/mplayer:nut - Enables support for the NUT container format
media-video/mplayer:osdmenu - Enables support for on-screen display (OSD) menus
media-video/mplayer:pnm - Add PNM video output option, to create PPM/PGM/PGMYUV images
media-video/mplayer:pvr - Enable Video4Linux2 MPEG PVR
media-video/mplayer:radio - Enable V4L2 radio interface and support
media-video/mplayer:rar - Enable Unique RAR File Library
media-video/mplayer:rtc - Enables usage of the linux real time clock. The alternative is software emulation of rtc
media-video/mplayer:rtmp - Enables RTMPDump Streaming Media support
media-video/mplayer:shm - Enable support for shm
media-video/mplayer:tga - Enables Targa video output
media-video/mplayer:toolame - Enable toolame MPEG-2 encoding
media-video/mplayer:tremor - Enable internal support for Vorbis
media-video/mplayer:twolame - Enable twolame MPEG-2 encoding
media-video/mplayer:vcd - Enables VCD support
media-video/mplayer:vidix - Support for vidix video output
media-video/mplayer:yuv4mpeg - Enables yuv4mpeg video output
media-video/mplayer:zoran - Enables ZR360[56]7/ZR36060 video output
media-video/mpv:archive - Enable support for various archive formats via app-arch/libarchive
media-video/mpv:bluray - Enable playback of Blu-ray filesystems
media-video/mpv:cli - Build mpv CLI player
media-video/mpv:cplugins - Enable C plugins support
media-video/mpv:cuda - Enable hardware video decoding via Nvidia CUDA
media-video/mpv:drm - Enable Kernel Mode Setting / Direct Rendering Manager based video output
media-video/mpv:egl - Enable support for various EGL-based video outputs / backends
media-video/mpv:gbm - Enable Graphics Buffer Manager based EGL video backend
media-video/mpv:jpeg - Enable support for saving screenshots in JPEG format
media-video/mpv:libass - Enable OSD (On Screen Display) and subtitles support via media-libs/libass
media-video/mpv:libmpv - Build mpv shared library
media-video/mpv:lua - Enable Lua scripting, OSC (On Screen Controller) GUI and net-misc/youtube-dl hook-script
media-video/mpv:opengl - Enable support for various OpenGL-based video backends
media-video/mpv:raspberry-pi - Enable support for the Raspberry Pi
media-video/mpv:rubberband - Enable high quality pitch correction via media-libs/rubberband
media-video/mpv:sdl - Enable media-libs/libsdl2 based video and audio outputs (Note: these outputs exist for compatibility reasons only, avoid if possible)
media-video/mpv:tools - Install extra tools: mpv_identify.sh, mpv_idet.sh, and umpv
media-video/mpv:uchardet - Enable subtitles charset discovery via app-i18n/uchardet
media-video/mpv:vulkan - Enable support for various Vulkan-based video backends
media-video/noad:libmpeg2 - Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg
media-video/nvidia_video_sdk:tools - Build and install example tools.
media-video/smplayer:autoshutdown - Enable the option to shutdown your computer after finishing the playlist. This requires dev-qt/qtdbus as dependency.
media-video/smplayer:mpris - Enable support for MPRIS2 (Media Player Remote Interfacing Specification, version 2), a DBus interface for remote control, which requires dev-qt/qtdbus as dependency.
media-video/subtitlecomposer:mpv - Build mpv backend support
media-video/totem:lirc - Enable support for controlling Totem with a remote control using app-misc/lirc
media-video/totem:nautilus - Enable the nautilus extension
media-video/totem:python - Build support for dev-lang/python plugins
media-video/transcode:mjpeg - Enables mjpegtools support
media-video/transcode:nuv - NuppelVideo container format demuxing
media-video/transcode:pic - disable optimized assembly code that is not PIC friendly
media-video/transcode:postproc - Build with ffmpeg libpostproc support
media-video/vdr:alternatechannel - Use alternate channel on record
media-video/vdr:bidi - fribidi support, for languages, written from right to left
media-video/vdr:ddepgentry - remove duplicate EPG entries
media-video/vdr:dvlvidprefer - controls video-dir choice on recording
media-video/vdr:graphtft - support for vdr-graphtft plugin up from version 0.1.7
media-video/vdr:html - Install HTML documentation
media-video/vdr:jumpingseconds - skip seconds in played records
media-video/vdr:jumpplay - Enables automatic jumping over cut marks while watching a recording
media-video/vdr:kbd - enable keyboard support as remote device
media-video/vdr:mainmenuhooks - Allows to replace main menu entries by some special plugins (like epgsearch, extrecmenu, ...)
media-video/vdr:menuorg - Enables support for the media-plugins/vdr-menuorg
media-video/vdr:menuselection - adds support for menu hotkeys of double digits
media-video/vdr:naludump - Removes NALU fill data from h.264-Streams of TS files
media-video/vdr:permashift - permanent timeshift by recording live TV on hard disk, need plugin media-plugins/vdr-permashift
media-video/vdr:permashift_v1 - permanent timeshift by recording live TV on RAM, need plugin >=mediaplugins/vdr-permashift-1
media-video/vdr:pinplugin - Support for media-plugins/vdr-pin
media-video/vdr:resumereset - rreset resume of EOF
media-video/vdr:rotor - Enable support for plugin vdr-rotor for dish-positioner.
media-video/vdr:ttxtsubs - support for media-plugins/vdr-ttxtsubs
media-video/vdr:vasarajanauloja - replacement for the liemikuutio patch, adds some nice must haves features
media-video/vdr:wareagleicon - Replace original icon set in menu
media-video/vdr:yaepg - Enables support for the vdr-yaepg plugin
media-video/vlc:X - Enable support for e.g. fullscreen mode via X and the X C-language binding. It does not build a graphical interface
media-video/vlc:aom - Enable experimental support for AV1 codec
media-video/vlc:archive - Enable support for libarchive stream extractor
media-video/vlc:aribsub - Enable support for decoding ARIB STD-B24 subtitles
media-video/vlc:bluray - Enable libbluray for Blu-ray disc support
media-video/vlc:chromaprint - Enable libchromaprint for Chromaprint based audio fingerprinter support
media-video/vlc:chromecast - Enable experimental support for Google Chromecast
media-video/vlc:dc1394 - Enable IIDC cameras support
media-video/vlc:directx - Enable Win32 DirectX, D3D11va and DxVA2 support
media-video/vlc:dvbpsi - Enable support for Mpeg-TS files (.ts, .m2ts, .mts) via media-libs/libdvbpsi
media-video/vlc:encode - Enable streaming-output support and videolan manager to control multiple streams from within one instance
media-video/vlc:faad - Enable AAC audio decoding library support via media-libs/faad2
media-video/vlc:fdk - Enable the Fraunhofer AAC codec library
media-video/vlc:fluidsynth - Enable Fluidsynth MIDI software synthesis (with external sound fonts)
media-video/vlc:gcrypt - Enable cryptography support via libgcrypt
media-video/vlc:gme - Enable support for media-libs/game-music-emu for playing various video game music formats
media-video/vlc:gstreamer - Enable GStreamer based decoding support (currently supports only video decoding)
media-video/vlc:kate - Adds support for Ogg Kate subtitles via libkate
media-video/vlc:kms - Enable kernel mode setting video output plugin via x11-libs/libdrm
media-video/vlc:libtar - Uses libtar instead of the built-in tar reader for reading custom skins
media-video/vlc:libtiger - Enable Ogg Kate subtitles rendering using libtiger
media-video/vlc:linsys - Enable support for Linux Linear Systems Ltd. SDI and HD-SDI input cards
media-video/vlc:live - Enable live555 streaming media support (client support for rtsp)
media-video/vlc:lua - Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things
media-video/vlc:macosx-notifications - Enable Mac OS X notifications module (formerly growl)
media-video/vlc:macosx-qtkit - Enable Mac OS X qtkit module: qtcapture (video) and qtsound (audio) module
media-video/vlc:matroska - Enable matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg)
media-video/vlc:mpeg - Add libmpeg2 support for mpeg-1 and mpeg-2 video streams
media-video/vlc:nfs - Enable support for nfs protocol via net-fs/libnfs
media-video/vlc:omxil - Enable OpenMAX Integration Layer codec module
media-video/vlc:opencv - Enable OpenCV (computer vision) filter module
media-video/vlc:optimisememory - Enable optimisation for memory rather than performance
media-video/vlc:postproc - Enable image post-processing via libpostproc (part of FFmpeg)
media-video/vlc:projectm - Enable the projectM visualization plugin
media-video/vlc:run-as-root - Allows vlc to start for root. Don't enable this unless you have a very specific (e.g. embedded) need for it!
media-video/vlc:sdl-image - Enable sdl image video decoder (depends on sdl)
media-video/vlc:sftp - Enable libssh2 to support SFTP file transfer
media-video/vlc:shout - Enable libshout output
media-video/vlc:sid - Adds support for playing C64 SID files through media-libs/libsidplay:2
media-video/vlc:skins - Enable support for the skins2 interface
media-video/vlc:soxr - Enable SoX Resampler support via media-libs/soxr
media-video/vlc:srt - Enable support for Secure Reliable Transport (SRT) via net-libs/srt
media-video/vlc:tremor - Enable tremor, a fixed-point version of the Ogg Vorbis decoder
media-video/vlc:twolame - Enable twolame support (MPEG Audio Layer 2 encoder)
media-video/vlc:upnp - Enable support for the Intel SDK stack based UPnP discovery module instead of CyberLink
media-video/vlc:vpx - Enable the decoder(s) from the WebM VP8 / VP9 Codec SDK
media-video/vlc:wma-fixed - Enable fixed point WMA decoder
media-video/vlc:x265 - Support X265 Encoder
media-video/vlc:zeroconf - Enable support for zero-configuration networking via avahi
media-video/vlc:zvbi - Enable support for teletext subtitles via the zvbi library
media-video/x264-encoder:10bit - Set output bit depth to 10
media-video/x264-encoder:avs - enable AvxSynth support in the AviSynth input module
media-video/x264-encoder:ffmpegsource - Enable ffmpegsource aka ffms support, disables lavf
media-video/x264-encoder:interlaced - Enable interlaced encoding support, this can decrease encoding speed by up to 2%
media-video/xine-ui:vdr - Enables Video Disk Recorder support
net-analyzer/argus:libtirpc - Build against net-libs/libtirpc for RPC support
net-analyzer/argus-clients:ft - Enable support for flow packets through net-analyzer/flow-tools
net-analyzer/bwm-ng:csv - Enable csv output
net-analyzer/bwm-ng:html - Enable html output
net-analyzer/cacti:doc - install html documentation
net-analyzer/echoping:http - enable support for http protocol.
net-analyzer/echoping:icp - enable support for ICP (used to monitor proxies).
net-analyzer/echoping:priority - enable socket priority support.
net-analyzer/echoping:smtp - enable support for SMTP protocol.
net-analyzer/echoping:tos - enable support for TOS (TYpe Of Service).
net-analyzer/ettercap:plugins - Install ettercap plugins (et_*.so)
net-analyzer/httping:tfo - Enable support for TCP Fast Open
net-analyzer/hydra:ncp - NCP protocol (NetWare) support through net-fs/ncpfs
net-analyzer/icinga:contrib - additional scripts
net-analyzer/icinga:eventhandler - Adds support for running custom scripts whenever a host or service state change occurs
net-analyzer/icinga:idoutils - Adds DB support
net-analyzer/icinga:lighttpd - Adds Lighttpd support
net-analyzer/icinga:plugins - Adds support for nagios plugins
net-analyzer/icinga:web - Adds generic web interface support
net-analyzer/icinga2:classicui - Adds support for the old interface
net-analyzer/icinga2:console - Adds support for line-editing in the console
net-analyzer/icinga2:lto - Adds support for link time optimization
net-analyzer/icinga2:mail - Allows for mailing of alerts
net-analyzer/icinga2:mariadb - Enable support for the mariadb database backend
net-analyzer/icinga2:nano-syntax - Adds support for syntax used in the nano editor
net-analyzer/icinga2:plugins - Adds support for nagios plugins
net-analyzer/icinga2:studio - Adds support for Icinga-studio
net-analyzer/linkchecker:sqlite - Mozilla Bookmark parsing
net-analyzer/monitoring-plugins:dns - Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:fping - Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:game - Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:snmp - Install dev-perl/Net-SNMP and net-analyzer/net-snmp required for monitoring SNMP values. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:ssh - Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugins.
net-analyzer/munin:apache - Set up the configuration of the CGI generation of HTML and graphs to work with Apache. This also install an include-able configuration file.
net-analyzer/munin:asterisk - Install the packages required for monitoring Asterisk. Disabling the flag does not remove any plugin files.
net-analyzer/munin:cgi - Install the CGI-compatible scripts for on-the-fly generation of web pages and graphs. This is only meaningful if the minimal USE flag is disabled.
net-analyzer/munin:dhcpd - Install dev-perl/Net-IP, dev-perl/HTTP-Date and net-misc/dhcp to monitor DHCP lease usage. This only works if the server is on the same system as the node, so the server is also brought in. Disabling the flag does not remove any plugin file.
net-analyzer/munin:doc - Build and install a local copy of the HTML documentation for the whole software. This requires dev-python/sphinx to process the documentation sources.
net-analyzer/munin:http - Install dev-perl/libwww-perl required for monitoring HTTP-based services such as Apache and nginx. Disabling the flag does not remove any plugin file.
net-analyzer/munin:ipmi - Install sys-apps/ipmitool required for monitoring IPMI sensors. Disabling the flag does not remove any plugin file.
net-analyzer/munin:ipv6 - Add support for IPv6 in munin-node. IPv6 support for the master is always enabled, but the node requires a newer version of dev-perl/Net-Server, capable of listening to IPv6 sockets.
net-analyzer/munin:irc - Install the packages required for monitoring IRC. Disabling the flag does not remove any plugin files.
net-analyzer/munin:java - Build the Java-based plugins to monitor JMX-compatible applications. Disabling the flag removes the jmx monitoring plugins.
net-analyzer/munin:memcached - Install the packages required for memcached monitoring. Disabling the flag does not remove any plugin files.
net-analyzer/munin:minimal - Only install munin-node and its plugins. This excludes the scripts to generate the web pages and the graphs.
net-analyzer/munin:mysql - Install the packages required for monitoring MySQL. Disabling the flag does not remove any plugin files.
net-analyzer/munin:postgres - Install the packages required for monitoring PostgreSQL. Disabling the flag does not remove any plugin files.
net-analyzer/munin:syslog - Configure the node by default to log on syslog. This requires the presence of virtual/perl-Sys-Syslog. As of version 2.0.2, the master scripts only log to file, and not to syslog.
net-analyzer/nagios-core:classicui - use the classic web theme
net-analyzer/nagios-core:lighttpd - install www-servers/lighttpd config
net-analyzer/nagios-core:web - enable web interface
net-analyzer/nagios-plugins:nagios-dns - Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-game - Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-ping - Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:snmp - Install dev-perl/Net-SNMP required for monitoring SNMP values. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:ssh - Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugin file.
net-analyzer/net-snmp:elf - Enable the use of elf utils to check uptime on some systems
net-analyzer/net-snmp:mfd-rewrites - Use MFD rewrites of mib modules where available
net-analyzer/net-snmp:netlink - Use dev-libs/libnl to fetch TCP statistics instead of using /proc/net/tcp (Linux only).
net-analyzer/net-snmp:pci - Use libpci (from sys-apps/pciutils) to look up network interface description. This feature is only available on Linux.
net-analyzer/net-snmp:rpm - Enable monitoring of app-arch/rpm. This flag requires the bzip2 and zlib flags to be enabled as well.
net-analyzer/net-snmp:smux - Enable support for the legacy smux protocol (superseded by agentx)
net-analyzer/net-snmp:ucd-compat - Build UCD compatibility library. Increases significantly the install size.
net-analyzer/netperf:demo - Emit interim results during the run. May affect results
net-analyzer/nfdump:compat15 - Enable read support for nfdump data files created with nfdump 1.5.x
net-analyzer/nfdump:ftconv - Build the flow-tools to nfdump converter
net-analyzer/nfdump:nfprofile - Build nfprofile used by NfSen
net-analyzer/nfdump:nftrack - Build nfprofile used by PortTracker
net-analyzer/nfdump:readpcap - Build nfcapd collector to read from pcap file instead ofnetwork data
net-analyzer/nfdump:sflow - Build sflow collector sfcpad
net-analyzer/nmap:libssh2 - Enable SSH support through net-libs/libssh2
net-analyzer/nmap:ncat - Install the ncat utility
net-analyzer/nmap:ndiff - Install the ndiff utility
net-analyzer/nmap:nmap-update - Install nmap-update, which uses dev-vcs/subversion to update nmap scripts in your home directory
net-analyzer/nmap:nping - Install the nping utility
net-analyzer/nmap:nse - Include support for the Nmap Scripting Engine (NSE)
net-analyzer/nmap:system-lua - Use dev-lang/lua instead of the bundled liblua
net-analyzer/nmap:zenmap - Install the GTK+ based nmap GUI, zenmap
net-analyzer/nrpe:command-args - Build support for specifying the command-line arguments from the Nagios/Icinga master. Make sure you understand the implications of this flag as it can be a security risk.
net-analyzer/nrpe:minimal - Only build the check plugins for Nagios/Icinga, and not the daemon.
net-analyzer/nsca:crypt - Build support for crypted communication with nsca, through dev-libs/libmcrypt. It's recommended not to disable this flag unless all the communication will be handled in an absolutely safe environment.
net-analyzer/nsca:minimal - Only build and install the send_nsca command and not the daemon. This allows a very minimal install with no overhead when setting up a node.
net-analyzer/pinger:gtk2 - Install the gtkpinger GUI utility based on x11-libs/gtk+:2
net-analyzer/pinger:gtk3 - Install the gtkpinger GUI utility based on x11-libs/gtk+:3
net-analyzer/pmacct:64bit - Use 64bit counters instead of 32bit ones
net-analyzer/pmacct:bgp-bins - Link BGP daemon binaries
net-analyzer/pmacct:bmp-bins - Link BMP daemon binaries
net-analyzer/pmacct:geoipv2 - Enable support for GeoIP2 through dev-libs/libmaxminddb
net-analyzer/pmacct:jansson - Enable support for JSON through dev-libs/jansson
net-analyzer/pmacct:kafka - Enable support for Apache Kafka through dev-libs/librdkafka
net-analyzer/pmacct:l2 - Enable Layer-2 features and support
net-analyzer/pmacct:mongodb - Enable support for MongoDB through dev-libs/mongo-c-driver
net-analyzer/pmacct:ndpi - Enable support for nDPI through net-libs/nDPI
net-analyzer/pmacct:nflog - Enable support for NFLOG through uacctd
net-analyzer/pmacct:plabel - Enable IP prefix labels
net-analyzer/pmacct:rabbitmq - Enable support for RabbitMQ through net-libs/rabbitmq-c
net-analyzer/pmacct:st-bins - Link Streaming Telemetry daemon binaries
net-analyzer/pmacct:traffic-bins - Link IPv4/IPv6 traffic accounting binaries
net-analyzer/pmacct:zmq - Enable support for ZeroMQ through net-libs/zeromq
net-analyzer/pnp4nagios:icinga - Build against net-analyzer/icinga2 or net-analyzer/icinga instead of net-analyzer/nagios-core
net-analyzer/pnp4nagios:nagios - Build against net-analyzer/nagios-core (the default)
net-analyzer/rrdtool:graph - Enable support for graphing functions
net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
net-analyzer/rrdtool:rrdcgi - Build rrdcgi support
net-analyzer/sarg:gd - Enable support for graphs in reports through media-libs/gd
net-analyzer/sarg:pcre - Enable support for regular expressions in the hostalias file through dev-libs/libpcre
net-analyzer/scapy:pyx - Enable dev-python/pyx support for psdump/pdfdump commands
net-analyzer/scapy:tcpreplay - Enable net-analyzer/tcpreplay support for fast packet replay
net-analyzer/smokeping:dig - Install net-dns/bind-tools for dig functionality
net-analyzer/smokeping:echoping - Install net-analyzer/echoping for echoping functionality
net-analyzer/smokeping:ssh - Install ssh functionality
net-analyzer/smokeping:telnet - Install dev-perl/Net-Telnet for telnet functionality
net-analyzer/tcpdump:drop-root - Drop privileges to tcpdump:tcpdump when run as root
net-analyzer/tcpdump:smi - Build with net-libs/libsmi to load MIBs on the fly to decode SNMP packets
net-analyzer/tcpreplay:pcapnav - Enable if you want the jump to byte offset feature via net-libs/libpcapnav
net-analyzer/tcpreplay:tcpdump - Use net-analyzer/tcpdump for packet decoding feature
net-analyzer/testssl:bundled-openssl - Install precompiled versions of OpenSSL for greater testing coverage
net-analyzer/wireshark:adns - Use net-dns/c-ares to resolve DNS names
net-analyzer/wireshark:androiddump - Install androiddump, an extcap interface to capture from Android devices
net-analyzer/wireshark:bcg729 - Use media-plugins/mediastreamer-bcg729 to play G.729 codec
net-analyzer/wireshark:capinfos - Install capinfos, to print information about capture files
net-analyzer/wireshark:captype - Install captype, to print the file types of capture files
net-analyzer/wireshark:ciscodump - Install ciscodump, extcap interface to capture from a remote Cisco router
net-analyzer/wireshark:dftest - Install dftest, to display filter byte-code, for debugging dfilter routines
net-analyzer/wireshark:doc-pdf - Build documentation in pdf format (US and a4 paper sizes)
net-analyzer/wireshark:dumpcap - Install dumpcap, to dump network traffic from inside wireshark
net-analyzer/wireshark:editcap - Install editcap, to edit and/or translate the format of capture files
net-analyzer/wireshark:libssh - Use net-libs/libssh (for sshdump)
net-analyzer/wireshark:libxml2 - Use dev-libs/libxml2 for handling XML configuration in dissectors
net-analyzer/wireshark:lz4 - Use app-arch/lz4 for compression/decompression
net-analyzer/wireshark:maxminddb - Use dev-libs/libmaxminddb for IP address geolocation
net-analyzer/wireshark:mergecap - Install mergecap, to merge two or more capture files into one
net-analyzer/wireshark:netlink - Use dev-libs/libnl
net-analyzer/wireshark:nghttp2 - Use net-libs/nghttp2 for HTTP/2 support
net-analyzer/wireshark:pcap - Use net-libs/libpcap for network packet capturing (build dumpcap, rawshark)
net-analyzer/wireshark:randpkt - Install randpkt, a utility for creating pcap trace files full of random packets
net-analyzer/wireshark:randpktdump - Install randpktdump, an extcap interface to provide access to the random packet generator (randpkt)
net-analyzer/wireshark:reordercap - Install reordercap, to reorder input file by timestamp into output file
net-analyzer/wireshark:sbc - Use media-libs/sbc for playing back SBC encoded packets
net-analyzer/wireshark:sharkd - Install sharkd, the daemon variant of wireshark
net-analyzer/wireshark:smi - Use net-libs/libsmi to resolve numeric OIDs into human readable format
net-analyzer/wireshark:snappy - Use app-arch/snappy for snappy compression and decompression
net-analyzer/wireshark:spandsp - Use media-libs/spandsp for for G.722 and G.726 codec support in the RTP Player
net-analyzer/wireshark:sshdump - Install sshdump, an extcap interface to capture from a remote host through SSH
net-analyzer/wireshark:text2pcap - Install text2pcap, to generate a capture file from an ASCII hexdump of packets
net-analyzer/wireshark:tfshark - Install tfshark, a terminal-based version of the FileShark capability
net-analyzer/wireshark:tshark - Install tshark, to dump and analyzer network traffic from the command line
net-analyzer/wireshark:udpdump - Install udpdump, to get packets exported from a source (like a network device or a GSMTAP producer) that are dumped to a pcap file
net-analyzer/zabbix:agent - Enable zabbix agent (for to-be-monitored machines)
net-analyzer/zabbix:frontend - Enable zabbix web frontend
net-analyzer/zabbix:ipv6 - Turn on support of IPv6
net-analyzer/zabbix:java - Enable Zabbix Java JMX Management Gateway
net-analyzer/zabbix:libxml2 - Use libxml2 client library
net-analyzer/zabbix:odbc - Enable Database Monitor and use UnixODBC Library by default
net-analyzer/zabbix:openipmi - Enable openipmi things
net-analyzer/zabbix:proxy - Enable proxy support
net-analyzer/zabbix:server - Enable zabbix server
net-analyzer/zabbix:ssh - SSH v2 based checks
net-analyzer/zabbix:static - Build statically linked binaries
net-dialup/freeradius:memcached - Include dev-libs/libmemcached in caching drivers
net-dialup/freeradius:pcap - Build the RADIUS sniffer which requires net-libs/libpcap.
net-dialup/freeradius:redis - Include support for Redis database
net-dialup/freeradius:rest - Include support for sending and receiving HTTP requests
net-dialup/freeradius-client:scp - Add service type hints derived from username prefix
net-dialup/freeradius-client:shadow - Enable shadow password support
net-dialup/mgetty:fax - Enables fax support
net-dialup/mgetty:fidonet - Enables FidoNet support
net-dialup/ppp:activefilter - Enables active filter support
net-dialup/ppp:atm - Enables ATM (Asynchronous Transfer Mode) protocol support
net-dialup/ppp:dhcp - Installs PPP DHCP client plugin for IP address allocation by a DHCP server (see http://www.netservers.co.uk/gpl/)
net-dialup/ppp:eap-tls - Enables support for Extensible Authentication Protocol and Transport Level Security (see http://www.nikhef.nl/~janjust/ppp/index.html)
net-dialup/ppp:gtk - Installs GTK+ password prompting program that can be used by passprompt.so PPP plugin for reading the password from a X11 input terminal
net-dialup/ppp:ipv6 - Enables support for IP version 6
net-dialup/ppp:pam - Enables PAM (Pluggable Authentication Modules) support
net-dialup/ppp:radius - Enables RADIUS support
net-dialup/xl2tpd:dnsretry - Patch for host lookup retries, activated by redial feature
net-dns/avahi:autoipd - Build and install the IPv4LL (RFC3927) network address configuration daemon
net-dns/avahi:bookmarks - Install the avahi-bookmarks application (requires dev-python/twisted-core and dev-python/twisted-web)
net-dns/avahi:gtk3 - Build the avahi-ui-gtk3 library, and use gtk3 for the avahi utilities under USE=utils
net-dns/avahi:howl-compat - Enable compat libraries for howl
net-dns/avahi:mdnsresponder-compat - Enable compat libraries for mDNSResponder
net-dns/avahi:utils - Install the avahi gtk+ utils avahi-discover, bssh, and bvnc
net-dns/bind:dlz - Enables dynamic loaded zones, 3rd party extension
net-dns/bind:dnsrps - Enable the DNS Response Policy Service (DNSRPS) API, a mechanism to allow an external response policy provider
net-dns/bind:dnstap - Enables dnstap packet logging
net-dns/bind:filter-aaaa - Enable filtering of AAAA records over IPv4
net-dns/bind:fixed-rrset - Enables fixed rrset-order option
net-dns/bind:gost - Enables gost OpenSSL engine support
net-dns/bind:gssapi - Enable gssapi support
net-dns/bind:json - Enable JSON statistics channel
net-dns/bind:libidn2 - Enables IDN support using net-dns/libidn2 rather than using net-dns/idnkit
net-dns/bind:lmdb - Enable LMDB support to store configuration for 'addzone' zones
net-dns/bind:nslint - Build and install the nslint util
net-dns/bind:rpz - Enable response policy rewriting (rpz)
net-dns/bind:urandom - Use /dev/urandom instead of /dev/random
net-dns/bind-tools:gost - Enables gost OpenSSL engine support
net-dns/bind-tools:gssapi - Enable gssapi support
net-dns/bind-tools:libidn2 - Enables IDN support using net-dns/libidn2 rather than using net-dns/idnkit
net-dns/bind-tools:urandom - Use /dev/urandom instead of /dev/random
net-dns/ddclient:examples - Install various example files, like for cron.
net-dns/ddclient:hardened - Use iproute2 instead of ifconfig to grab an IP address
net-dns/ddclient:iproute2 - Use sys-apps/iproute2 instead of sys-apps/net-tools for interaction.
net-dns/dnsmasq:auth-dns - Add support for acting as an authorative DNS server.
net-dns/dnsmasq:conntrack - Add support for Linux conntrack connection marking.
net-dns/dnsmasq:dhcp - Enable support for acting as a DHCP server.
net-dns/dnsmasq:dhcp-tools - Install extra command line tools for manually managing DHCP leases.
net-dns/dnsmasq:dnssec - Enable support DNSSEC validation and caching.
net-dns/dnsmasq:dumpfile - Include code to dump packets to a libpcap-format file for debugging
net-dns/dnsmasq:id - Whether report *.bind CHAOS info to clients, otherwise forward such requests upstream instead
net-dns/dnsmasq:libidn2 - Enable support for Internationalized Domain Names, via net-dns/libidn2 rather than net-dns/libidn
net-dns/dnsmasq:script - Enable support for calling scripts when leases change.
net-dns/dnsmasq:tftp - Enables built in TFTP server for netbooting.
net-dns/idnkit:liteonly - Compile and install lite library only
net-dns/ldns-utils:dane - Enable DNS-based Authentication of Named Entities (DANE) support
net-dns/ldns-utils:ecdsa - Enable ECDSA support
net-dns/ldns-utils:gost - Enable GOST support
net-dns/maradns:authonly - Allows one to build only authoritative DNS server
net-dns/mydns:alias - Enable David Phillips aliasing
net-dns/mydns:status - Enable the STATUS opcode to check server status
net-dns/nsd:bind8-stats - Enables BIND8 like NSTATS and XSTATS
net-dns/nsd:dnstap - Enable the structured binary log format
net-dns/nsd:libevent - Use libevent or libev, useful when zone count is high
net-dns/nsd:minimal-responses - If minimal responses are disabled, responses are more likely to get truncated, resulting in TCP fallback
net-dns/nsd:munin - Install a plugin for net-analyzer/munin to graph statistical data from nsd.
net-dns/nsd:nsec3 - Enable NSEC3 support
net-dns/nsd:ratelimit - Enables ratelimiting, based on query name, type and source
net-dns/nsd:root-server - Configure NSD as a root server
net-dns/nsd:runtime-checks - Enable runtime checks, this could lead to a reduced service level
net-dns/pdns:botan - Make it possible to use the dev-libs/botan library for crypto-related stuff (like DNSSec) which can be significantly faster than PolarSSL.
net-dns/pdns:mydns - Making it possible to use a MyDNS MySQL database with PowerDNS (not recommended for new deployments).
net-dns/pdns:opendbx - Use a database supported by dev-db/opendbx as backend.
net-dns/pdns:protobuf - Enable support for dev-libs/protobuf.
net-dns/pdns:remote - Use a generic socket or pipe as a backend (via JSON RPC requests).
net-dns/pdns:sodium - Use dev-libs/libsodium for cryptography
net-dns/pdns:tinydns - Use a TinyDNS CDB database as backend.
net-dns/pdns:tools - Build optional tools (dnsscan, dnsscope, etc..).
net-dns/pdns-recursor:protobuf - Enable support for dev-libs/protobuf.
net-dns/pdns-recursor:sodium - Use dev-libs/libsodium for cryptography
net-dns/pdnsd:isdn - Linux-only: check status of ippp interfaces with ISDN-specific system calls.
net-dns/pdnsd:urandom - Linux-only: use /dev/urandom (pseudo-random number generation) instead of the default use of random() PRNG.
net-dns/unbound:dnscrypt - Enable DNSCrypt support
net-dns/unbound:dnstap - Enable dnstap support
net-dns/unbound:ecdsa - Enable ECDSA support
net-dns/unbound:ecs - Enable EDNS client subnet support
net-dns/unbound:gost - Enable GOST support
net-dns/unbound:redis - Enable cache db backend which uses dev-libs/hiredis
net-firewall/arno-iptables-firewall:plugins - Install optional plugins
net-firewall/conntrack-tools:cthelper - Use net-libs/libnetfilter_cthelper for userspace conntrack helper support
net-firewall/conntrack-tools:cttimeout - Use net-libs/libnetfilter_cttimeout for conntrack timeout support
net-firewall/conntrack-tools:libtirpc - Use net-libs/libtirpc for RPC support
net-firewall/ebtables:perl - Install the ebtables-save script which uses perl
net-firewall/firehol:ipset - Use net-firewall/ipset.
net-firewall/firewalld:gui - Builds and installs GUI configurator and GTK+ applet
net-firewall/ipt_netflow:natevents - Netflow NAT translation events (NEL) support
net-firewall/iptables:conntrack - Build against net-libs/libnetfilter_conntrack when enables the connlabel matcher
net-firewall/iptables:netlink - Build against libnfnetlink which enables the nfnl_osf util
net-firewall/iptables:nftables - Support nftables kernel interface
net-firewall/iptables:pcap - Build against net-libs/libpcap which enables the nfbpf_compile util
net-firewall/nftables:json - Enable JSON support via dev-libs/jansson
net-firewall/shorewall:init - Adds the capability to place the firewall in a safe state prior to bringing up the network interfaces
net-firewall/shorewall:ipv4 - Installs everything needed to create a full IPv4 firewall
net-firewall/shorewall:ipv6 - Adds the capability to create a full IPv6 firewall (requires net-firewall/shorewall ipv4 USE flag)
net-firewall/shorewall:lite4 - Installs everything needed to just *run* an IPv4 compiled firewall script created with net-firewall/shorewall ipv4 USE flag
net-firewall/shorewall:lite6 - Installs everything needed to just *run* an IPv6 compiled firewall script created with net-firewall/shorewall ipv6 USE flag
net-fs/autofs:dmalloc - Enable debugging with the dmalloc library
net-fs/autofs:ldap - Install LDAP module
net-fs/autofs:libtirpc - Use TiRPC library instead of SunRPC
net-fs/autofs:mount-locking - Enable locking to prevent corruption of /etc/mtab in the presence of concurrent auto-mounting. If enabled, recursive auto-mounting (eg. using autofs to bind or loop mount a filesystem which is itself auto-mounted) is not possible.
net-fs/autofs:sasl - Enable SASL support in the LDAP module
net-fs/cifs-utils:ads - Enable Active Directory support and create cifs.idmap binary - idmap support
net-fs/cifs-utils:caps - libcap support
net-fs/cifs-utils:caps-ng - libcap-ng support
net-fs/cifs-utils:creds - cifs credentials support
net-fs/libnfs:utils - Build/install nfs-{cat,ls,cp} utils
net-fs/netatalk:pgp - Add support pgp authentication module
net-fs/netatalk:quota - Add support for user quota on various filesystems
net-fs/netatalk:shadow - Add shadow support
net-fs/netatalk:ssl - Use dev-libs/openssl to provide DHX User Access Modules. These are not used with most recent versions of OS X and can be kept disabled without risks.
net-fs/netatalk:tracker - Add support for spotlight like tracker
net-fs/netatalk:utils - Install afpstats script
net-fs/nfs-utils:junction - Enable NFS junction support in nfsref
net-fs/nfs-utils:ldap - Add ldap support
net-fs/nfs-utils:libmount - Link mount.nfs with libmount
net-fs/nfs-utils:nfsdcld - Enable nfsdcld NFSv4 clientid tracking daemon
net-fs/nfs-utils:nfsidmap - Enable support for newer nfsidmap helper
net-fs/nfs-utils:nfsv4 - Enable support for NFSv4
net-fs/nfs-utils:nfsv41 - Enable support for NFSv4.1
net-fs/nfs-utils:uuid - Support UUID lookups in rpc.mountd
net-fs/openafs:bitmap-later - Enable fast startup of file server by not reading bitmap till needed.
net-fs/openafs:fuse - Build fuse client.
net-fs/openafs:modules - Build libafs kernel module. Disable only if you know what you're doing: without this module OpenAFS client will not work.
net-fs/openafs:pthreaded-ubik - Enable installation of pthreaded ubik applications.
net-fs/openafs:supergroups - Enable support for nested pts groups.
net-fs/s3fs:gnutls - Enable net-libs/gnutls crypto backend
net-fs/s3fs:nettle - Use dev-libs/nettle network functions with GnuTLS.
net-fs/s3fs:nss - Enable dev-libs/nss crypto backend
net-fs/s3fs:openssl - Enable dev-libs/openssl crypto backend
net-fs/samba:addc - Enable Active Directory Domain Controller support
net-fs/samba:addns - Enable AD DNS integration
net-fs/samba:ads - Enable Active Directory support
net-fs/samba:ceph - Enable support for Ceph distributed filesystem via sys-cluster/ceph
net-fs/samba:client - Enables the client part
net-fs/samba:cluster - Enable support for clustering
net-fs/samba:dmapi - Enable support for DMAPI. This currently works only in combination with XFS.
net-fs/samba:gpg - Use app-crypt/gpgme for AD DC
net-fs/samba:iprint - Enabling iPrint technology by Novell
net-fs/samba:json - Enable json audit support through dev-libs/jansson
net-fs/samba:quota - Enables support for user quotas
net-fs/samba:system-heimdal - Use app-crypt/heimdal instead of bundled heimdal.
net-fs/samba:system-mitkrb5 - Use app-crypt/mit-krb5 instead of app-crypt/heimdal.
net-fs/samba:winbind - Enables support for the winbind auth daemon
net-ftp/frox:transparent - Enable transparent proxying of data connections
net-ftp/lftp:convert-mozilla-cookies - Install the convert-mozilla-cookies script and its run-time dependencies
net-ftp/lftp:verify-file - Install the verify-file script and its run-time dependencies
net-ftp/proftpd:authfile - Enable support for the auth-file module
net-ftp/proftpd:ban - Enable support for the mod_ban module
net-ftp/proftpd:case - Enable support for the mod_case module
net-ftp/proftpd:copy - Enable support for the mod_copy module
net-ftp/proftpd:ctrls - Enable support for the mod_ctrls and mod_ctrls_admin modules
net-ftp/proftpd:deflate - Enable support for the mod_deflate module
net-ftp/proftpd:diskuse - Enable support for the mod_diskuse module
net-ftp/proftpd:dso - Enable support for the mod_dso module
net-ftp/proftpd:dynmasq - Enable support for the mod_dynmasq module, for dynamically updating MasqueradeAddress for dyndns-like scenarios)
net-ftp/proftpd:exec - Enable support for the mod_exec module. WARNING: this could be a security risk
net-ftp/proftpd:ident - Enable support for the mod_ident module
net-ftp/proftpd:ifsession - Enable support for the ifsession module
net-ftp/proftpd:ifversion - Enable support for the mod_ifversion module
net-ftp/proftpd:log_forensic - Enable support for the mod_log_forensic module, log only suspicious actions.
net-ftp/proftpd:memcache - Enable support for the mod_memcache module, for using memcached servers
net-ftp/proftpd:msg - Enable support for the mod_msg module, allows system users to send messages to connected clients via the ftpdctl program.
net-ftp/proftpd:qos - Enable support for the mod_qos module
net-ftp/proftpd:ratio - Enable support for the mod_ratio module
net-ftp/proftpd:readme - Enable support for the mod_readme module
net-ftp/proftpd:rewrite - Enable support for the rewrite module
net-ftp/proftpd:sftp - Enable support for the mod_sftp module and optionally mod_sftp_sql and mod_sftp_pam if matching USE flags are enabled
net-ftp/proftpd:shaper - Enable support for the mod_shaper module
net-ftp/proftpd:sitemisc - Enable support for the sitemisc module
net-ftp/proftpd:softquota - Enable support for the quotatab module
net-ftp/proftpd:trace - Build with trace support. Should not be enabled on production servers
net-ftp/proftpd:unique_id - Enable support for the mod_unique_id module, every connection gets unique ID.
net-ftp/proftpd:vroot - Enable support for the virtual root module
net-ftp/pure-ftpd:anondel - Permit anonymous to delete files
net-ftp/pure-ftpd:anonperm - Permit anonymous to change file permissions
net-ftp/pure-ftpd:anonren - Permit anonymous to rename files
net-ftp/pure-ftpd:anonres - Permit anonymous to resume file transfers
net-ftp/pure-ftpd:charconv - Enables charset conversion
net-ftp/pure-ftpd:implicittls - Enable TLS on Port 990
net-ftp/pure-ftpd:noiplog - Disables logging of IP addresses
net-ftp/pure-ftpd:paranoidmsg - Display paranoid messages instead of normal ones
net-ftp/pure-ftpd:resolveids - Resolve UIDs/GIDs
net-ftp/pure-ftpd:sysquota - Enables system quota support (needs sys-fs/quota)
net-ftp/pure-ftpd:vchroot - Enable support for virtual chroot (possible security risk)
net-im/bitlbee:libevent - Use libevent for event handling
net-im/bitlbee:nss - Use NSS for SSL support in MSN and Jabber
net-im/bitlbee:otr - Enable support for encrypted conversations
net-im/bitlbee:plugins - Enable support for plugins
net-im/bitlbee:purple - Use libpurple instead of the built-in IM protocol support
net-im/bitlbee:twitter - Enable Twitter protocol support
net-im/choqok:attica - Build Open Collaboration Services plugin using kde-frameworks/attica
net-im/choqok:konqueror - Build Konqueror Choqok plugin
net-im/choqok:telepathy - Enable support for the real-time communication framework telepathy
net-im/ejabberd:captcha - Support for CAPTCHA Forms (XEP-158) on registration
net-im/ejabberd:full-xml - Use XML features in XMPP stream (ex: CDATA), requires XML compliant clients
net-im/ejabberd:hipe - Compile natively with HiPE, not recommended
net-im/ejabberd:mssql - Enable Microsoft SQL Server support (via ODBC) for data storage
net-im/ejabberd:mysql - Enable MySQL support for data storage
net-im/ejabberd:nls - Enable character set conversion for mod_irc
net-im/ejabberd:odbc - Enable ODBC support to access data storage
net-im/ejabberd:postgres - Enable PostgreSQL support for data storage
net-im/ejabberd:redis - Enable Redis support for transient data
net-im/ejabberd:riak - Enable support for Riak - distributed NoSQL key-value data store
net-im/ejabberd:roster-gw - Turn on workaround for processing gateway subscriptions
net-im/ejabberd:sqlite - Enable SQLite database support
net-im/ejabberd:zlib - Enable Stream Compression (XEP-0138) using zlib
net-im/empathy:gnome-online-accounts - Enable using net-libs/gnome-online-accounts for authorization (e.g. for Google Talk)
net-im/empathy:map - Enable world map support through media-libs/libchamplain
net-im/gajim:idle - Enable idle module
net-im/gajim:srv - SRV capabilities
net-im/gajim:xhtml - Enable XHTML support
net-im/kadu:gadu - Enables Gadu communication protocol
net-im/kadu:mpd - Enables Music Player Daemon support
net-im/kadu:otr - Enable char encryption via OTR library
net-im/kadu:sdk - Install Kadu SDK (cmake module, API headers)
net-im/kadu:speech - Enables speech module
net-im/mcabber:aspell - Adds support for app-text/aspell spell checker.
net-im/mcabber:otr - Enable encrypted conversations using Off-The-Records messaging
net-im/pidgin:gadu - Enable Gadu Gadu protocol support
net-im/pidgin:groupwise - Enable Novell Groupwise protocol support
net-im/pidgin:gstreamer - Enables voice and video sessions
net-im/pidgin:gtk - Builds Pidgin, the GTK+ interface
net-im/pidgin:meanwhile - Enable meanwhile support for Sametime protocol
net-im/pidgin:ncurses - Build finch, console interface
net-im/pidgin:prediction - Enable Contact Availability Prediction plugin
net-im/pidgin:python - Build libgnt (GLib Ncurses Toolkit used by finch) with python scripting support
net-im/pidgin:silc - Enable SILC protocol support
net-im/pidgin:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/pidgin:zephyr - Enable Zephyr protocol support
net-im/prosody:jit - Use LuaJIT instead of vanilla Lua
net-im/prosody:libevent - Use libevent for event handling
net-im/prosody:zlib - Support for compressing XMPP streams with mod_compression
net-im/pyicq-t:webinterface - Install dependencies needed for the web interface
net-im/telepathy-connection-managers:gadu - Enable Gadu Gadu protocol support.
net-im/telepathy-connection-managers:irc - Enable Internet Relay Chat (IRC) support.
net-im/telepathy-connection-managers:meanwhile - Enable meanwhile support for Sametime protocol.
net-im/telepathy-connection-managers:sip - Enable SIP/SIMPLE messaging and calling.
net-im/telepathy-connection-managers:sipe - Enable Sip Exchange Protocol.
net-im/telepathy-connection-managers:steam - Enable Steam Chat support.
net-im/telepathy-connection-managers:xmpp - Enable XMPP protocol handler (this is also Google Talk).
net-im/telepathy-connection-managers:yahoo - Enable Yahoo! messaging support.
net-im/telepathy-connection-managers:zeroconf - Enable Link-Local Messaging via the zeroconf or Bonjour protocol.
net-im/tkabber:plugins - Enables installation the extra plugins
net-irc/bip:freenode - Enables freenode-specific functionality. Currently that is only support for mute lists (MODE #channel +q).
net-irc/bip:noctcp - Disable the automatic CTCP VERSION reply which is often exploited by malicious people to cause a DoS (reconnect due to flooding).
net-irc/bip:oidentd - Enable oidentd support
net-irc/epic5:archive - Use app-arch/libarchive to use zip and tar archives from scripts.
net-irc/epic5:valgrind - Compile against dev-util/valgrind headers to improve memory-leak checking when running epic5 under valgrind.
net-irc/hexchat:libcanberra - Enable sound event support using media-libs/libcanberra
net-irc/hexchat:libproxy - Enable proxy support.
net-irc/hexchat:plugin-checksum - Build Checksum plugin (needs plugins)
net-irc/hexchat:plugin-fishlim - Build FiSHLiM plugin (needs plugins )
net-irc/hexchat:plugin-sysinfo - Build SysInfo plugin (needs plugins)
net-irc/hexchat:theme-manager - Build the theme manager (mono)
net-irc/inspircd:geoip - Add geoip support for country and city lookup based on IPs
net-irc/inspircd:gnutls - Enable TLS support
net-irc/inspircd:ipv6 - Enable support for IP version 6
net-irc/inspircd:ldap - Enable LDAP support
net-irc/inspircd:mysql - Enable MySQL database backend
net-irc/inspircd:pcre - Adds support for Perl Compatible Regular Expressions
net-irc/inspircd:posix - Adds support for POSIX-compatible functions
net-irc/inspircd:postgres - Enable PostgreSQL database backend
net-irc/inspircd:sqlite - Enable Sqlite database backend
net-irc/inspircd:ssl - Enable SSL support
net-irc/inspircd:tre - Enable support for TRE, a lightweight, robust, and efficient POSIX compliant regexp matching library
net-irc/iroffer-dinoex:admin - Compile with HTTP Admin
net-irc/iroffer-dinoex:blowfish - Compile with blowfish encryption support
net-irc/iroffer-dinoex:chroot - Compile with chroot support
net-irc/iroffer-dinoex:http - Compile with HTTP server support
net-irc/iroffer-dinoex:kqueue - Compile with kqueue() support
net-irc/iroffer-dinoex:memsave - Compile with memory protection
net-irc/iroffer-dinoex:telnet - Compile with Telnet server support
net-irc/irssi:proxy - Adds support for a loadable IRC proxy module
net-irc/kvirc:dcc_video - Support video connections over DCC protocol
net-irc/kvirc:phonon - Support Phonon for audio output
net-irc/ngircd:ident - Enables support for net-libs/libident
net-irc/quassel:X - Build the Qt5 GUI client for quassel. If this USE flag is disabled, the GUI is not built, and cannot be used. You might want to disable this on the server, but you need it enabled on the client.
net-irc/quassel:bundled-icons - Use icon themes bundled with Quassel, rather than depending on system packages.
net-irc/quassel:crypt - Support core->network per-channel and per-query blowfish encryption via app-crypt/qca SLOT 2.
net-irc/quassel:dbus - Support desktop notifications via the StatusNotifier D-Bus service (used by most modern desktop environments).
net-irc/quassel:monolithic - Build standalone client with integrated core, no external quasselcore needed. Only useful if you don't want to use Quassel's client/server model. The server and X flags are not needed in this case but it is possible to enable them too.
net-irc/quassel:oxygen - Support the Oxygen icon set that was the default for KDE4.
net-irc/quassel:phonon - Build client with phonon backend support. This enables sound playback in client.
net-irc/quassel:server - Build the server binary. If this USE flag is disabled, the 'core' server binary for quassel is not built, and cannot be used. You need this enabled on the server, but you might want to disable it on the client.
net-irc/quassel:snorenotify - Support for Snore notification framework.
net-irc/quassel:urlpreview - Use QtWebEngine rendering engine for showing URL thumbnails.
net-irc/shadowircd:largenet - Enable support/tweaks for large networks
net-irc/unrealircd:class-nofakelag - Enable an unsupported class::options flag called “nofakelag” allowing you to grant fakelag exemption to normal user (instead of just opers).
net-irc/unrealircd:extban-stacking - Enable extended channel bans (such as +b ~c: and +b ~n:) to contain other extended bans instead of just hostmasks.
net-irc/unrealircd:operoverride - Enable OperOverride extension
net-irc/unrealircd:operoverride-verify - Enable requiring opers to invite themselves to +s/+p channels
net-irc/unrealircd:prefixaq - Enable chanadmin and chanowner prefixes
net-irc/unrealircd:showlistmodes - Display channel modes in /LIST (only configured at compiletime)
net-irc/unrealircd:shunnotices - Enable notifying a user when un-shunned
net-irc/unrealircd:topicisnuhost - Enable displaying nick!user@host as topic setter
net-irc/unrealircd:usermod - Enable /set* and /chg* commands
net-irc/weechat:alias - Enable plugin for alias control
net-irc/weechat:buflist - Enable buflist plugin
net-irc/weechat:charset - Enable encoding conversions
net-irc/weechat:exec - Enable exec plugin
net-irc/weechat:fifo - Enable FIFO support (sh pipes)
net-irc/weechat:fset - Enable fast set plugin
net-irc/weechat:irc - Enable IRC protocol support
net-irc/weechat:logger - Enable support for logging
net-irc/weechat:relay - Enable relay plugin (experimental)
net-irc/weechat:scripts - Build infrastructure for scripting
net-irc/weechat:trigger - Enable trigger plugin
net-irc/weechat:xfer - Enable xfer plugin support
net-irc/znc:zlib - Enable mod_deflate-like gzip support for znc's web interface using sys-libs/zlib.
net-libs/aqbanking:chipcard - Enable support for DDV/RSA-chipcards
net-libs/aqbanking:ebics - Enable support for Electronic Banking Internet Communication Standard (EBICS)
net-libs/axtls:cgi-lua - Enables lua backed cgi for axhttpd server
net-libs/axtls:cgi-php - Enables php backed cgi for axhttpd server
net-libs/axtls:httpd - Enables axhttpd web server component
net-libs/axtls:static - Statically build axhttpd server
net-libs/c-client:chappa - Enable Eduardo Chappa's patches for use with mail-client/alpine (mainly adds support for maildir)
net-libs/c-client:doc - Install RFCs related to IMAP
net-libs/c-client:topal - Enable support for net-mail/topal for use with mail-client/alpine
net-libs/courier-authlib:vpopmail - Enable vpopmail support
net-libs/daq:afpacket - Build the AFPacket data acquisition module. Functions similar to the PCAP module but with better performance. Snort can run unprivileged when using this module. AFpacket supports both inline and passive modes.
net-libs/daq:dump - Build the Dump data acquisition module. The dump DAQ allows you to test the various inline mode features available in 2.9 Snort like injection and normalization.
net-libs/daq:ipq - Build the IPQ data acquisition module. IPQ is the old way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module.
net-libs/daq:nfq - Build the NFQ data acquisition module. NFQ is the new way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module.
net-libs/daq:pcap - Build the PCAP data acquisition module.
net-libs/davix:tools - Install additional tools
net-libs/glib-networking:gnome - Extract HTTP/HTTPS/SOCKS proxy configuration stored using GSettings
net-libs/glib-networking:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
net-libs/gnome-online-accounts:gnome - Use gnome-base/gnome-control-center to set GNOME online accounts preferences
net-libs/gnutls:dane - Build libgnutls-dane, implementing DNS-based Authentication of Named Entities. Requires net-dns/unbound
net-libs/gnutls:openpgp - Enable openpgp support
net-libs/gnutls:openssl - Build openssl compatibility libraries
net-libs/gnutls:pkcs11 - Add support for PKCS#11 through app-crypt/p11-kit
net-libs/gnutls:sslv2 - Support for the old/insecure SSLv2 protocol
net-libs/gnutls:sslv3 - Support for the old/insecure SSLv3 protocol
net-libs/gnutls:test-full - Enable full test mode
net-libs/gnutls:tls-heartbeat - Enable the Heartbeat Extension in TLS and DTLS
net-libs/gnutls:tools - Build extra tools
net-libs/gnutls:valgrind - Enable usage of dev-util/valgrind in debug
net-libs/ldns:dane - Enable DNS-based Authentication of Named Entities (DANE) support
net-libs/ldns:ecdsa - Enable ECDSA support
net-libs/ldns:gost - Enable GOST support
net-libs/libbitcoinconsensus:asm - Enable assembly for optimization
net-libs/libbitcoinconsensus:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-libs/libesmtp:ntlm - Enable support for NTLM authentication
net-libs/libetpan:liblockfile - Enable support for liblockfile library
net-libs/libgsasl:gcrypt - Use dev-libs/libgcrypt for low-level crypto
net-libs/libgsasl:ntlm - Add support for Microsoft's NTLM mechanism using net-libs/libntlm
net-libs/libisds:openssl - Use dev-libs/openssl as crypto backend instead of app-crypt/gpgme and dev-libs/libgcrypt
net-libs/libmicrohttpd:epoll - use epoll() system call
net-libs/libmicrohttpd:messages - enable error messages
net-libs/libnftnl:json - Supports parsing of JSON
net-libs/libnids:glib - Use dev-libs/glib for multiprocessing support
net-libs/libnids:libnet - Include code requiring net-libs/libnet
net-libs/liboauth:bindist - Alias for the nss USE flag, since there are license compliancy trouble when using OpenSSL.
net-libs/liboauth:curl - If enabled, net-misc/curl is used thorugh the libcurl library; if it's not, the curl command is used instead. Some features are only available when using the library, but using it as library requires matching SSL implementations.
net-libs/liboauth:nss - Use Mozilla NSS (dev-libs/nss) as hash library; if this is disabled, dev-libs/openssl is used instead.
net-libs/liboping:filecaps - Allow non-root users to use [n]oping utility.
net-libs/liboping:ncurses - Build ncurses-based version of oping utility (requires sys-libs/ncurses)
net-libs/libpcap:netlink - Use dev-libs/libnl to put wireless interfaces in monitor mode.
net-libs/libproxy:gnome - Enable support for reading proxy settings from GNOME
net-libs/libproxy:kde - Enable support for reading proxy settings from KDE
net-libs/libproxy:spidermonkey - Use libmozjs from dev-lang/spidermonkey for PAC parsing
net-libs/libproxy:webkit - Use libjavascriptcoregtk from net-libs/webkit-gtk for PAC parsing
net-libs/libqmi:mbim - Support QMI over Mobile Broadband Interface Model (MBIM)
net-libs/libsoup:gssapi - Enable GSSAPI support
net-libs/libsoup:samba - Use net-fs/samba for NTLM Single Sign-On
net-libs/libsrtp:aesicm - Use AES ICM cryptographic algorithm
net-libs/libsrtp:console - Use /dev/console instead of stdout for error messages
net-libs/libsrtp:openssl - Use OpenSSL crypto primitives
net-libs/libsrtp:syslog - Use syslog for error messages
net-libs/libssh:gcrypt - Use dev-libs/libgcrypt as TLS provider
net-libs/libssh:gssapi - Enable gssapi support
net-libs/libssh:mbedtls - Use net-libs/mbedtls as TLS provider
net-libs/libssh:pcap - Build with PCAP output support
net-libs/libssh:server - Build with SSH server support
net-libs/libssh:sftp - Build with SFTP support
net-libs/libssh2:gcrypt - Use dev-libs/libgcrypt instead of dev-libs/openssl
net-libs/libssh2:libressl - Use dev-libs/libressl instead of dev-libs/openssl
net-libs/libssh2:mbedtls - Use net-libs/mbedtls instead of dev-libs/openssl
net-libs/libtorrent-rasterbar:dht - Enable DHT (distributed hash table) support
net-libs/libupnp:blocking-tcp - Do not use async socket calls.
net-libs/libupnp:reuseaddr - Allow clean restarts by binding the socket with SO_REUSEADDR.
net-libs/libupnp:samples - Install sample applications.
net-libs/libvncserver:24bpp - enable 24bpp support
net-libs/libvncserver:gcrypt - enable support for gcrypt
net-libs/libwebsockets:access-log - Support generating Apache-compatible access logs
net-libs/libwebsockets:cgi - Include CGI (spawn process with network-connected stdin/out/err) APIs
net-libs/libwebsockets:client - The client part of the library and libwebsockets-test-client
net-libs/libwebsockets:generic-sessions - With the Generic Sessions plugin
net-libs/libwebsockets:http-proxy - Support for rewriting HTTP proxying
net-libs/libwebsockets:http2 - Support the HTTP/2 protocol
net-libs/libwebsockets:lejp - With the Lightweight JSON Parser
net-libs/libwebsockets:libev - Support event loops via dev-libs/libev
net-libs/libwebsockets:libevent - Support event loops via dev-libs/libevent
net-libs/libwebsockets:libuv - Support asynchronous I/O via dev-libs/libuv
net-libs/libwebsockets:peer-limits - Track peers and restrict resources a single peer can allocate
net-libs/libwebsockets:server-status - Support json + jscript server monitoring
net-libs/libwebsockets:smtp - Provide SMTP support
net-libs/libwebsockets:socks5 - Allow use of SOCKS5 proxy on client connections
net-libs/libwebsockets:sqlite3 - Require SQLITE3 support
net-libs/libwebsockets:zip - Support serving pre-zipped files
net-libs/loudmouth:asyncns - Use net-libs/libasyncns for asynchronous name resolution.
net-libs/loudmouth:openssl - Enable dev-libs/openssl support instead of gnutls (which is the default).
net-libs/mbedtls:havege - Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments
net-libs/mbedtls:programs - Build PolarSSL programs
net-libs/neon:libproxy - Add support for net-libs/libproxy
net-libs/neon:pkcs11 - Add support for PKCS#11 using dev-libs/pakchois
net-libs/nghttp2:hpack-tools - Install HPACK (header compression) helper tools
net-libs/nghttp2:utils - Install nghttp, nghttpd and nghttpx
net-libs/nodejs:inspector - Enable V8 inspector
net-libs/nodejs:npm - Enable NPM package manager
net-libs/nodejs:snapshot - Enable snapshot creation for faster startup
net-libs/nodejs:systemtap - Enable SystemTAP/DTrace tracing
net-libs/ortp:ntp-timestamp - Turn on NTP timestamping on received packet
net-libs/ortp:srtp - Add support for Secure RTP
net-libs/phodav:spice - Install the spice-webdavd guest agent
net-libs/pjproject:amr - Inlcude AMR codec in the build
net-libs/pjproject:epoll - Use /dev/epoll ioqueue on Linux (experimental)
net-libs/pjproject:g711 - Include G.711 codecs in the build
net-libs/pjproject:g722 - Include G.722 codec in the build
net-libs/pjproject:g7221 - Include G.722.1 codec in the build
net-libs/pjproject:ilbc - Include iLBC codec in the build
net-libs/pjproject:l16 - Include Linear/L16 codec family in the build
net-libs/pjproject:libyuv - Include libyuv in the build
net-libs/pjproject:openh264 - Include Open H.264 support in the build
net-libs/pjproject:resample - Include resampling implementations in the build
net-libs/pjproject:silk - Include SILK support in the build
net-libs/pjproject:v4l2 - Include Video4Linux v2 support in the build
net-libs/pjproject:webrtc - Enable WebRTC support
net-libs/qxmpp:vpx - Enable VP8 codec support via media-libs/libvpx
net-libs/rabbitmq-c:tools - Builds cli tools to interact with brokers
net-libs/shairplay:alac - Add support for Apple Lossless Audio Codec files
net-libs/shairplay:playfair - Add support for handling fairplay handshake (used in for example screen mirroring)
net-libs/shairplay:tools - Build and install a binary shairplay in /usr/bin
net-libs/telepathy-qt:farstream - Enable support for audio/video calls via farstream
net-libs/udns:tools - Build and install dnsget, ex-rdns and rblcheck tools
net-libs/webkit-gtk:coverage - Enable code coverage support
net-libs/webkit-gtk:egl - Enable EGL support
net-libs/webkit-gtk:geolocation - Enable geolocation support through app-misc/geoclue
net-libs/webkit-gtk:gles2 - Enable GLESv2 support
net-libs/webkit-gtk:nsplugin - Enable full nsplugin support (GTK2 plugins)
net-libs/webkit-gtk:webgl - Build support for the WebGL HTML API using virtual/opengl
net-libs/wvstreams:boost - Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface.
net-libs/xrootd:fuse - Enable the sys-fs/fuse filesystem driver
net-libs/xrootd:http - Enable http protocol support
net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
net-libs/zeromq:drafts - Build draft API, which may change at any time without any notice, and is therefore not recommended for normal use.
net-libs/zeromq:pgm - Build PGM (Pragmatic General Multicast)extention, a protocol for reliable multicast transport of data over IP networks.
net-libs/zeromq:sodium - Use dev-libs/libsodium for cryptography
net-mail/automx:memcached - Enable memcached support
net-mail/automx:sql - Enable support for SQL backends
net-mail/automx:tools - Install additional automx-test tool
net-mail/courier-imap:trashquota - include deleted messages, and the Trash folder, in the estimated quota usage for maildirs
net-mail/cyrus-imapd:backup - Enable backup service support
net-mail/cyrus-imapd:calalarm - Enable CalDAV alarm support
net-mail/cyrus-imapd:http - Enable http support
net-mail/cyrus-imapd:jmap - Enable JMAP support
net-mail/cyrus-imapd:lmdb - Enable support for using dev-db/lmdb
net-mail/cyrus-imapd:replication - Enable replication support
net-mail/cyrus-imapd:server - Enable building server binaries
net-mail/cyrus-imapd:sieve - Enable sieve support
net-mail/cyrus-imapd:sphinx - Enable Sphinx search engine support
net-mail/cyrus-imapd:xapian - Enable Xapian search engine support
net-mail/dbmail:sieve - Enable sieve filter support
net-mail/dovecot:argon2 - Add support for ARGON2 password schemes
net-mail/dovecot:cydir - Add cydir storage support
net-mail/dovecot:imapc - Add imap client storage support
net-mail/dovecot:lucene - Add lucene full text search (FTS) support using dev-cpp/clucene
net-mail/dovecot:lz4 - Add support for lz4 (de)compression
net-mail/dovecot:lzma - Add support for lzma (de)compression
net-mail/dovecot:managesieve - Add managesieve protocol support
net-mail/dovecot:mdbox - Add mdbox storage support
net-mail/dovecot:pop3c - Add pop3 client storage support
net-mail/dovecot:sdbox - Add sdbox storage support
net-mail/dovecot:sieve - Add sieve support
net-mail/dovecot:solr - Add solr full text search (FTS) support
net-mail/dovecot:textcat - Add libtextcat language guessing support for full text search (FTS)
net-mail/dovecot:vpopmail - Add vpopmail support
net-mail/fdm:courierauth - Add support for Courier authentication library
net-mail/fetchmail:socks - Enable support for socks proxy
net-mail/fetchmail:tk - Enable support for Tk GUI toolkit, in particular it installs fetchmailconf
net-mail/gnubiff:password - Enable save passwords to connect mail servers in user space
net-mail/isync:compat - Enable legacy utilities
net-mail/lbdb:abook - Enables app-misc/abook support
net-mail/lbdb:evo - Add support for mail-client/evolution
net-mail/lbdb:finger - Enables finger support
net-mail/libpst:dii - enable dii support
net-mail/mailutils:clients - Build client programs - frm maidag mail sieve messages readmsg dotlock movemail mimeview mh
net-mail/mailutils:kyotocabinet - Enable Kyoto Cabinet database support
net-mail/mailutils:servers - Build server programs - imap4d pop3d comsatd
net-mail/mailutils:tokyocabinet - Enable Tokyo Cabinet database support
net-mail/mairix:gnus - Add support for the marks propagation feature in GNUS (provided by app-editors/emacs or app-xemacs/gnus for XEmacs users)
net-mail/mu:emacs - Install the mu4e mail client.
net-mail/notmuch:crypt - Support decryption and verification of PGP/MIME messages and in Emacs UI - encryption; support also S/MIME signature verification since version 0.22
net-mail/notmuch:doc - Install API documentation
net-mail/notmuch:emacs - Install Emacs UI (the main one)
net-mail/notmuch:mutt - Install helper script for Mutt
net-mail/notmuch:nmbug - Install experimental tag sharing / pseudo-bug-tracking script for Notmuch (see http://notmuchmail.org/nmbug/)
net-mail/notmuch:valgrind - Depend on dev-util/vagrind for test suite
net-mail/offlineimap:sqlite - Enable runtime support for sqlite mail status backend.
net-mail/qmailadmin:maildrop - Filter spam using maildrop
net-mail/qpopper:apop - Enables the pop.auth file in /etc/pop.auth
net-mail/qpopper:mailbox - Enables mail spool file is in home directory ~/Mailbox
net-mail/uw-imap:clearpasswd - Enables cleartext logins outside of SSL sessions
net-mail/vchkuser:debug - Enables debug messages to syslog
net-mail/vpopmail:clearpasswd - Enables cleartext password storage in the vpasswd files
net-mail/vpopmail:ipalias - Enables enable-ip-alias-domains
net-mail/vpopmail:maildrop - Enables mail-filter/maildrop support in vdelivermail
net-mail/vpopmail:spamassassin - Enables mail-filter/spamassassin support
net-misc/aria2:bittorrent - Enable support for the bittorrent protocol.
net-misc/aria2:libuv - Use dev-libs/libuv backend.
net-misc/aria2:libxml2 - Use dev-libs/libxml2 for XML parsing (preferred) instead of dev-libs/expat.
net-misc/aria2:metalink - Enable support for metalink.
net-misc/aria2:nettle - Use dev-libs/nettle and dev-libs/gmp for bittorrent/metalink crypto instead of dev-libs/libgcrypt (when dev-libs/openssl is not being used).
net-misc/aria2:scripts - Install additional scripts which use aria2's xmlrpc functionality.
net-misc/aria2:ssh - Enable SFTP support.
net-misc/asterisk:cluster - Enable high-availability support through the Corosync Cluster Engine
net-misc/asterisk:dahdi - Support Digium compatible hardware (formerly known as Zaptel).
net-misc/asterisk:gtalk - Enable support for Google Talk services
net-misc/asterisk:http - Enable embedded web server
net-misc/asterisk:ilbc - Enable the Internet Low Bitrate Codec (iLBC)
net-misc/asterisk:newt - Include additional tools that require redhats windowing toolkit
net-misc/asterisk:osplookup - Support secure peering using the Open Settlement Protocol
net-misc/asterisk:pjproject - Enable support for pjproject (pjsip)
net-misc/asterisk:samples - Install sample sound and configuration files (default: on)
net-misc/asterisk:span - Enable support for the spandsp codec
net-misc/asterisk:srtp - Enable support for encrypted voice transmission (secure RTP)
net-misc/asterisk-core-sounds:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-core-sounds:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-core-sounds:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-core-sounds:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-core-sounds:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-core-sounds:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-core-sounds:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-core-sounds:wav - Install the sounds files for the wav codec.
net-misc/asterisk-extra-sounds:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-extra-sounds:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-extra-sounds:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-extra-sounds:gsm - Install the sounds files for the +gsm codec.
net-misc/asterisk-extra-sounds:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-extra-sounds:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-extra-sounds:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-extra-sounds:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-extra-sounds:wav - Install the sounds files for the wav codec.
net-misc/asterisk-moh-opsound:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-moh-opsound:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-moh-opsound:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-moh-opsound:gsm - Install the sounds files for the +gsm codec.
net-misc/asterisk-moh-opsound:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-moh-opsound:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-moh-opsound:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-moh-opsound:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-moh-opsound:wav - Install the sounds files for the wav codec.
net-misc/bfgminer:adl - Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
net-misc/bfgminer:alchemist - Enable support for mining with AlcheMist
net-misc/bfgminer:antminer - Enable support for mining with AntMiner U1 sticks
net-misc/bfgminer:avalon - Enable support for mining with Avalon 1 ASIC modules
net-misc/bfgminer:avalonmm - Enable support for mining with Avalon 2/3 ASIC modules
net-misc/bfgminer:bfsb - Enable support for mining on BFSB host Raspberry Pi
net-misc/bfgminer:bfx - Enable support for mining with BFx2 USB sticks
net-misc/bfgminer:bifury - Enable support for mining with Bi*fury USB sticks
net-misc/bfgminer:bigpic - Enable support for mining with Big Picture Mining USB sticks (Red/BlueFury, BF1, etc)
net-misc/bfgminer:bitforce - Enable support for mining with ButterFly Labs BitFORCE ASICs and/or FPGAs
net-misc/bfgminer:bitfury - Enable support for mining with 55nm Bitfury-based devices
net-misc/bfgminer:bitmain - Enable support for mining with Bitmain Antminer S* series
net-misc/bfgminer:cointerra - Enable support for mining with CoinTerra TerraMiner.
net-misc/bfgminer:cpumining - Enable support for mining with CPUs
net-misc/bfgminer:drillbit - Enable support for mining with Drillbit boards
net-misc/bfgminer:dualminer - Enable support for mining with DualMiner USB sticks
net-misc/bfgminer:gridseed - Enable support for mining with 5-chip GridSeed orbs
net-misc/bfgminer:hashbuster - Enable support for mining with HashBuster nano boards
net-misc/bfgminer:hashbuster2 - Enable support for mining with HashBuster micro boards
net-misc/bfgminer:hashfast - Enable support for mining with HashFast devices
net-misc/bfgminer:icarus - Enable support for mining with Icarus-compatible devices (including Block Erupter Sapphire ASICs)
net-misc/bfgminer:jingtian - Enable support for mining on JingTian boards via SPI/GPIO
net-misc/bfgminer:keccak - Enable support for mining with Keccak miners
net-misc/bfgminer:klondike - Enable support for mining with Klondike USB miners
net-misc/bfgminer:libusb - Use libusb
net-misc/bfgminer:littlefury - Enable support for mining with LittleFury USB sticks
net-misc/bfgminer:metabank - Enable support for mining on Metabank host Raspberry Pi
net-misc/bfgminer:minion - Enable support for mining on minion chips via SPI (BlackArrow Prospero)
net-misc/bfgminer:modminer - Enable support for mining with ModMiner FPGAs
net-misc/bfgminer:nanofury - Enable support for mining with NanoFury USB sticks
net-misc/bfgminer:opencl - Enable support for mining with OpenCL-capable devices (GPUs)
net-misc/bfgminer:proxy - Enable support for virtual proxy device
net-misc/bfgminer:proxy_getwork - Enable proxy support for getwork protocol (often used with Block Erupter Blades)
net-misc/bfgminer:proxy_stratum - Enable proxy support for stratum protocol
net-misc/bfgminer:rockminer - Enable support for mining with RockMiner devices
net-misc/bfgminer:screen - Provide start-bfgminer.sh script to launch BFGMiner in app-misc/screen
net-misc/bfgminer:scrypt - Enable support for scrypt mining algorithm
net-misc/bfgminer:sha256d - Enable support for SHA256d mining algorithm
net-misc/bfgminer:twinfury - Enable support for mining with Twinfury USB sticks
net-misc/bfgminer:udev-broad-rules - Enable broader udev rules that may match non-mining devices
net-misc/bfgminer:x6500 - Enable support for mining with X6500 FPGAs
net-misc/bfgminer:zeusminer - Enable support for mining with ZeusMiner units
net-misc/bfgminer:ztex - Enable support for mining with Ztex FPGAs
net-misc/cfengine:html - Install HTML documentation
net-misc/cfengine:libvirt - Enable support for virtual machine management through app-emulation/libvirt
net-misc/cfengine:masterfiles - Install the Masterfiles Policy Framework
net-misc/cfengine:qdbm - Use dev-db/qdbm as database backend
net-misc/cfengine:tests - Install test files
net-misc/cfengine:tokyocabinet - Use dev-db/tokyocabinet as database backend
net-misc/chrony:adns - Support for asynchronous DNS
net-misc/chrony:cmdmon - Support for command and monitoring
net-misc/chrony:html - Install HTML documentation
net-misc/chrony:ntp - Support for the Network Time Protocol (NTP)
net-misc/chrony:phc - Support for the PTP (Precision Time Protocol) Hardware Clock (PHC) interface
net-misc/chrony:pps - Support for the Linux Pulse Per Second (PPS) interface
net-misc/chrony:refclock - Support for reference clocks
net-misc/chrony:rtc - Support for the Linux Real Time Clock interface
net-misc/connman:ethernet - Enable ethernet support.
net-misc/connman:iptables - Use net-firewall/iptables as firewall.
net-misc/connman:iwd - Enable wifi support via net-wireless/iwd
net-misc/connman:l2tp - Use net-dialup/xl2tpd for L2TP VPN support.
net-misc/connman:nftables - Use net-firewall/nftables as firewall.
net-misc/connman:ofono - Use net-misc/ofono for telephony support.
net-misc/connman:openconnect - Use net-vpn/openconnect for VPN support.
net-misc/connman:openvpn - Use net-vpn/openvpn for openvpn support.
net-misc/connman:pptp - Use net-dialup/pptpclient for PPTP VPN support.
net-misc/connman:tools - Enable testing tools.
net-misc/connman:vpnc - Use net-vpn/vpnc for cisco VPN support.
net-misc/connman:wispr - Enable support for WISPr hotspot logins.
net-misc/connman-gtk:openconnect - Support easier authentication to AnyConnect VPNs
net-misc/curl:brotli - Enable brotli compression support
net-misc/curl:http2 - Enabled HTTP/2.0 support
net-misc/curl:metalink - Enable metalink support
net-misc/curl:rtmp - Enable RTMP Streaming Media support
net-misc/curl:ssh - Enabled SSH urls in curl using libssh2
net-misc/curl:ssl - Enable crypto engine support (via openssl if USE='-gnutls -nss')
net-misc/dahdi:flash - Support (short) flash on FXS
net-misc/dahdi-tools:ppp - Enables PPP/DAHDIRAS support
net-misc/dhcp:client - Install the dhclient program
net-misc/dhcp:server - Install the dhcpd and dhcrelay programs
net-misc/dhcpcd:embedded - Embed the definitions of dhcp options in the dhcpcd executable
net-misc/dhcpcd-ui:gtk3 - Add support for x11-libs/gtk+ (The GIMP Toolkit)
net-misc/dropbear:bsdpty - Add support for legacy BSD pty's rather than dynamic UNIX pty's -- do not use this flag unless you are absolutely sure you actually want it
net-misc/dropbear:multicall - Build all the programs as one little binary (to save space)
net-misc/dropbear:shadow - Enable shadow password support
net-misc/dropbox:librsync-bundled - Use bundled librsync library
net-misc/electrum:audio_modem - Enable plugin to support Audio Modem
net-misc/electrum:cli - Enables the CLI interface
net-misc/electrum:cosign - Enable plugin to support multisig wallets between multiple Electrum clients
net-misc/electrum:digitalbitbox - Enable plugin to support Digital Bitbox hardware wallet
net-misc/electrum:email - Enable plugin to support emailing invoices
net-misc/electrum:greenaddress_it - Enable plugin to verify GreenAddress.it instant transactions
net-misc/electrum:qrcode - Enable QR code scanning with media-gfx/zbar
net-misc/electrum:revealer - Enable revealer plugin for extra security. https://revealer.cc/
net-misc/electrum:sync - Enable plugin to sync wallet metadata across multiple Electrum clients
net-misc/electrum:trustedcoin_com - Enable plugin to use two-factor service by TrustedCoin.com
net-misc/electrum:vkb - Enable plugin for virtual keyboard
net-misc/freerdp:client - Build client binaries
net-misc/freerdp:openh264 - Enable H.264 support using media-libs/openh264
net-misc/freerdp:server - Build server binaries
net-misc/gnome-online-miners:flickr - Enable Flickr support
net-misc/gsasl:gcrypt - Use dev-libs/libgcrypt for low-level crypto
net-misc/gsasl:ntlm - Add support for Microsoft's NTLM mechanism using net-libs/libntlm
net-misc/gwget:epiphany - Build epiphany extensions
net-misc/hotot:chrome - Build chrome browser extension
net-misc/htbinit:esfq - Add support for Enhanced Stochastic Fairness queueing discipline.
net-misc/hylafaxplus:html - Convert faxes into html email
net-misc/hylafaxplus:jbig - JBIG Fax Compression Support
net-misc/hylafaxplus:mgetty - Receive faxes via serial port connections
net-misc/hylafaxplus:pam - hfaxd authentication via PAM
net-misc/icaclient:l10n_zh_CN - Install Chinese translation
net-misc/icecast:kate - Add karaoke and text encapsulation support for Ogg files
net-misc/icecast:logrotate - Install support files for app-admin/logrotate?
net-misc/icecast:yp - Build support for yp public directory listings
net-misc/iperf:profiling - Create a profiled iperf3 binary
net-misc/iputils:SECURITY_HAZARD - Allow non-root users to flood (ping -f). This is generally a very bad idea.
net-misc/iputils:arping - Build and install arping -- tool for sending ARP requests to peers (see also net-analyzer/arping)
net-misc/iputils:clockdiff - Build and install clockdiff -- tool for comparing clocks via ICMP packets
net-misc/iputils:gcrypt - Use dev-libs/libgcrypt for md5 support
net-misc/iputils:nettle - Use dev-libs/nettle for md5 support
net-misc/iputils:openssl - Use dev-libs/openssl for md5 support
net-misc/iputils:rarpd - Build and install rarpd -- server for handling RARP (reverse ARP) requests; generally only used by old systems
net-misc/iputils:rdisc - Build and install rdisc -- server for the client side of the ICMP router discover protocol
net-misc/iputils:tftpd - Build and install tftpd -- server for the Trivial File Transfer Protocol (see also net-ftp/tftp-hpa)
net-misc/iputils:tracepath - Build and install tracepath -- tool for tracing network paths for discovering MTU values
net-misc/iputils:traceroute - Build and install traceroute -- tool for tracing network paths (see also net-analyzer/traceroute)
net-misc/knock:server - Installs the knockd server daemon.
net-misc/libteam:zmq - Build witch net-libs/zeromq support
net-misc/lldpd:cdp - Enable Cisco Discovery Protocol
net-misc/lldpd:dot1 - Enable Dot1 extension (VLAN stuff)
net-misc/lldpd:dot3 - Enable Dot3 extension (PHY stuff)
net-misc/lldpd:edp - Enable Extreme Discovery Protocol
net-misc/lldpd:fdp - Enable Foundry Discovery Protocol
net-misc/lldpd:graph - Create dot graphs in documentations
net-misc/lldpd:jansson - Enable JSON output via Jansson
net-misc/lldpd:lldpmed - Enable LLDP-MED extension
net-misc/lldpd:old-kernel - Enable compatibility with Linux kernel older than 2.6.39
net-misc/lldpd:sanitizers - Enable code instrumentation with selected sanitizers
net-misc/lldpd:snmp - Enable the use of SNMP
net-misc/lldpd:sonmp - Enable SynOptics Network Management
net-misc/memcached:slabs-reassign - Allow manual reassignment of memory slabs at the cost of slab optimizations.
net-misc/minidlna:netgear - Enable netgear branding
net-misc/minidlna:readynas - Enable readynas branding
net-misc/modemmanager:mbim - Enable MBIM modem protocol
net-misc/modemmanager:qmi - Enable support for the QMI modem protocol used by devices with Qualcomm chipsets
net-misc/mosh:client - Build network client
net-misc/mosh:examples - Include example scripts
net-misc/mosh:mosh-hardening - Enable compiler and linker options to frustrate memory corruption exploits
net-misc/mosh:server - Build network server
net-misc/mosh:ufw - Install net-firewall/ufw rule set
net-misc/mosh:utempter - Include libutempter support
net-misc/netkit-bootparamd:libtirpc - Build against net-libs/libtirpc for RPC support
net-misc/networkmanager:connection-sharing - Use net-dns/dnsmasq and net-firewall/iptables for connection sharing
net-misc/networkmanager:consolekit - Use sys-auth/consolekit for session tracking
net-misc/networkmanager:dhclient - Use dhclient from net-misc/dhcp for getting ip
net-misc/networkmanager:dhcpcd - Use net-misc/dhcpcd for getting ip
net-misc/networkmanager:elogind - Use sys-auth/elogind for session tracking
net-misc/networkmanager:iwd - Use net-wireless/iwd instead of net-wireless/wpa_supplicant for wifi support by default
net-misc/networkmanager:json - Enable JSON validation via dev-libs/jansson in libnm.
net-misc/networkmanager:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
net-misc/networkmanager:nss - Use dev-libs/nss for cryptography
net-misc/networkmanager:ofono - Use net-misc/ofono for telephony support.
net-misc/networkmanager:ovs - Enable OpenVSwitch support
net-misc/networkmanager:ppp - Enable support for mobile broadband and PPPoE connections using net-dialup/ppp
net-misc/networkmanager:resolvconf - Use net-dns/openresolv for managing DNS information in /etc/resolv.conf. Generally, a symlink to /run/NetworkManager/resolv.conf is simpler. On systems running systemd-resolved, disable this flag and create a symlink to /run/systemd/resolve/stub-resolv.conf.
net-misc/networkmanager:teamd - Enable Teamd control support
net-misc/networkmanager:wext - Enable support for the deprecated Wext (Wireless Extensions) API; needed for some older drivers (e.g. ipw2200, ndiswrapper)
net-misc/networkmanager:wifi - Enable support for wifi and 802.1x security
net-misc/ntp:openntpd - Allow ntp to be installed alongside openntpd
net-misc/ntp:parse-clocks - Add support for PARSE clocks
net-misc/ntp:samba - Provide support for Samba's signing daemon (needed for Active Directory domain controllers)
net-misc/ntpclient:debug - Enable analysis code path and debugging of NTP protocol.
net-misc/ntpclient:embedded - Build a very small ntpclient, from OpenWRT project.
net-misc/ntpclient:obsolete - Enable obsolete features, to use with kernel versions older than 3.0
net-misc/ntpclient:syslog - Enable logging to syslog instead of logging to stderr.
net-misc/ofono:atmodem - ETSI AT modem support.
net-misc/ofono:bluetooth - Enable Bluetooth modem support using net-wireless/bluez.
net-misc/ofono:cdmamodem - Enable CDMA modem support.
net-misc/ofono:datafiles - Enable install configuration and data files.
net-misc/ofono:dundee - Enable BlueTooth DUN deamon support.
net-misc/ofono:isimodem - Enable PhoNet/ISI modem support.
net-misc/ofono:phonesim - Enable phone Simulator support
net-misc/ofono:provision - Enable GPRS provisioning support
net-misc/ofono:qmimodem - Enable Qualcomm QMI modem support
net-misc/ofono:tools - Enable testing tools
net-misc/oidentd:masquerade - Enable support for masqueraded/NAT connections
net-misc/olsrd:pud - Install the Node Position Update plugin
net-misc/openntpd:libressl - Enable HTTPS TLS time constraint support using dev-libs/libressl
net-misc/openssh:X509 - Adds support for X.509 certificate authentication
net-misc/openssh:bindist - Disable EC/RC5 algorithms in OpenSSL for patent reasons.
net-misc/openssh:hpn - Enable high performance ssh
net-misc/openssh:ldap - Add support for storing SSH public keys in LDAP
net-misc/openssh:ldns - Use LDNS for DNSSEC/SSHFP validation.
net-misc/openssh:livecd - Enable root password logins for live-cd environment.
net-misc/openssh:ssh1 - Support the legacy/weak SSH1 protocol
net-misc/openssh:ssl - Enable additional crypto algorithms via OpenSSL
net-misc/openvswitch:monitor - Build the Python and GUI dependent monitor applications
net-misc/putty:gtk - Build the PuTTY client which requires x11-libs/gtk+:2. Otherwise only the CLI tools puttygen, plink, pscp and psftp will be built.
net-misc/quagga:bgpclassless - Apply unofficial patch to enable classless prefixes for BGP. Patch and information to be found at http://hasso.linux.ee/doku.php/english:network:quagga
net-misc/quagga:fpm - Enable Forwarding Plane Manager support
net-misc/quagga:multipath - Enable multipath routes support for any number of routes
net-misc/quagga:nhrpd - Build Next Hop Resolution Protocol daemon
net-misc/quagga:ospfapi - Enable OSPFAPI support for client applications accessing the OSPF link state database
net-misc/quagga:pam - Add support for PAM (via sys-libs/pam) to the Quagga Virtual Terminal Interface Shell (vtysh); if the readline USE flag is disabled, this flag is ignored
net-misc/quagga:protobuf - Enable support for dev-libs/protobuf
net-misc/quagga:readline - Enable support for sys-libs/readline to provide the Quagga Virtual Terminal Interface Shell (vtysh)
net-misc/quagga:tcp-zebra - Enable TCP zserv interface on port 2600 for Zebra/protocol-daemon communication. Unix domain sockets are chosen otherwise
net-misc/rdesktop:kerberos - Enable CredSPP support + Kerberos authentication with net-libs/libgssglue
net-misc/rdesktop:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite driver
net-misc/rdesktop:xrandr - Enable XRandR window extension support
net-misc/remmina:spice - Support connecting to SPICE-enabled virtual machines
net-misc/remmina:ssh - Enable support for SSH/SFTP protocol
net-misc/remmina:telepathy - Enable telepathy support
net-misc/rsync:stunnel - Provide helper scripts for using rsync via >=net-misc/stunnel-4
net-misc/rygel:tracker - Install dependencies for the tracker plugin
net-misc/rygel:transcode - Install dependencies for transcoding support
net-misc/scponly:gftp - Enables gFTP compatibility
net-misc/scponly:logging - Enables SFTP logging compatibility
net-misc/scponly:passwd - Enables passwd compatibility
net-misc/scponly:quota - Enables quota compatibility
net-misc/scponly:rsync - Enables rsync compatibility with potential security risks
net-misc/scponly:scp - Enables scp compatibility with potential security risks
net-misc/scponly:sftp - Enables SFTP compatibility
net-misc/scponly:subversion - Enables Subversion compatibility with potential security risks
net-misc/scponly:unison - Enables Unison compatibility with potential security risks
net-misc/scponly:wildcards - Enables wildcard processing with potential security risks
net-misc/scponly:winscp - Enables WinSCP 2.0 compatibility with potential security risks
net-misc/sitecopy:rsh - This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.
net-misc/sitecopy:webdav - Enable WebDav (Web-based Distributed Authoring and Versioning) support. This system allows users to collaborate on websites using a web based interface. See the ebuild for an FAQ page. Enables neon as well to handle webdav support.
net-misc/sks:optimize - Enables bytecode optimization
net-misc/spice-gtk:dbus - Support for desktop integration such as automounting and other APIs exposed by your DE via D-Bus
net-misc/spice-gtk:gstaudio - Using gstreamer backend as audio decodec support
net-misc/spice-gtk:gstvideo - Using gstreamer backend as video decodec support
net-misc/spice-gtk:gtk3 - Build the spice client (spicy), requires x11-libs/gtk+:3
net-misc/spice-gtk:lz4 - Enable support for LZ4 compression using app-arch/lz4
net-misc/spice-gtk:mjpeg - Enable builtin mjpeg video decoder
net-misc/spice-gtk:policykit - Enable sys-auth/polkit support for the usbredir acl helper
net-misc/spice-gtk:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
net-misc/spice-gtk:webdav - Support for folder-sharing between guest and client using net-libs/phodav
net-misc/streamtuner:shout - Enable shoutcast plug-in.
net-misc/streamtuner:xiph - Enable xiph.org plug-in.
net-misc/stunnel:stunnel3 - Install the stunnel3 wrapper.
net-misc/tigervnc:dri3 - Build with DRI3 support
net-misc/tigervnc:drm - Build with DRM support
net-misc/tigervnc:server - Build TigerVNC server
net-misc/tigervnc:xorgmodule - Build the Xorg module
net-misc/vde:pcap - Enable the pcap-based plugin that allows creating a switch against a real interface.
net-misc/vde:ssl - Enable the cryptcab plugin that allows creating an encrypted virtual cable.
net-misc/vinagre:spice - Enable access to SPICE-enabled virtual machines
net-misc/vinagre:ssh - Enable ssh plugin using x11-libs/vte
net-misc/vinagre:telepathy - Enable access to remote desktop via a net-libs/telepathy-glib client
net-misc/vino:telepathy - Enable desktop sharing through a telepathy client
net-misc/wget:ntlm - Enable support for NTLM (Windows-based) authorization
net-misc/wget:uuid - Generate UUIDs for the WARC (Web ARChive file format) using libuuid; otherwise use a simple RNG (random number generator)
net-misc/wicd:ambiance - Install icons from Ubuntu's ambiance theme
net-misc/wicd:gnome-shell - Install gnome-shell extension
net-misc/wicd:gtk - Installs a gtk UI. This is enabled by default because it is intended behavior. Requires dev-python/pygtk
net-misc/wicd:ioctl - Installs additional python libraries to use as a backend. This will improve speed but is experimental.
net-misc/wicd:mac4lin - Change default icons to mac4lin icon set
net-misc/wicd:ncurses - Installs a ncurses UI
net-misc/wicd:pm-utils - Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils
net-misc/x2goserver:fuse - Use net-fs/sshfs to allow shared folders
net-misc/youtube-viewer:gtk - Install the gtk GUI, called gtk-youtube-viewer
net-nds/ldapvi:gnutls - Use net-libs/gnutls instead of dev-libs/openssl
net-nds/openldap:experimental - Enable experimental backend options
net-nds/openldap:kinit - Enable support for kerberos init
net-nds/openldap:minimal - Build libraries & userspace tools only. Does not install any server code
net-nds/openldap:odbc - Enable ODBC and SQL backend options
net-nds/openldap:overlays - Enable contributed OpenLDAP overlays
net-nds/openldap:pbkdf2 - Enable support for pbkdf2 passwords
net-nds/openldap:sha2 - Enable support for pw-sha2 password hashes
net-nds/openldap:smbkrb5passwd - Enable overlay for syncing ldap, unix and lanman passwords
net-nds/rpcbind:remotecalls - Enable remote calls
net-nds/rpcbind:warmstarts - Enables rpcbind to cache configuration for warm restarts
net-nds/tac_plus:finger - Adds support for checking user counts via fingering the NAS
net-nds/tac_plus:maxsess - Enforce a limit on maximum sessions per user
net-news/liferea:gnome-keyring - Enable support for Libsecret Support plugin that allows Liferea to use app-crypt/libsecret as password store
net-news/liferea:mediaplayer - Enable support for Media Player plugin that allows to play music and videos directly from Liferea
net-news/liferea:networkmanager - Use NetworkManager to monitor nerwork status
net-news/liferea:notification - Enable support for Popup Notifications plugin that display popups informing about new updates
net-news/liferea:tray - Enable support for Tray Icon (GNOME Classic) plugin that display a small system tray icon to hide/unhide Liferea
net-nntp/nzbget:parcheck - Enable support for checking PAR archives
net-nntp/slrn:canlock - Add support for cancel locks via net-libs/canlock
net-nntp/slrn:uudeview - Add support for yEnc coding and more using dev-libs/uulib
net-nntp/tin:cancel-locks - Enable Cancel-Lock header functionality (also enables USE=evil)
net-nntp/tin:etiquette - Enable the display off posting etiquettes
net-nntp/tin:gpg - Enable app-crypt/gnupg support
net-nntp/tin:mime - Add MIME support
net-p2p/amule:daemon - Enable amule daemon
net-p2p/amule:remote - Enable remote controlling of the client
net-p2p/amule:stats - Enable statistic reporting
net-p2p/bitcoin-cli:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoin-qt:asm - Enable assembly for optimization
net-p2p/bitcoin-qt:bip70 - Enable support for the BIP70 payment protocol
net-p2p/bitcoin-qt:bitcoin_policy_rbf - Replace By Fee policy: Your node will preferentially mine and relay transactions paying the highest fee, regardless of receive order
net-p2p/bitcoin-qt:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoin-qt:libevent - Use dev-libs/libevent (needed for JSON-RPC, REST, and Tor auto-configuration
net-p2p/bitcoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/bitcoin-qt:upnp - Enable Universal Plug and Play
net-p2p/bitcoin-qt:wallet - Enable wallet support
net-p2p/bitcoin-qt:zeromq - Report blocks and transactions via zeromq
net-p2p/bitcoind:asm - Enable assembly for optimization
net-p2p/bitcoind:bitcoin_policy_rbf - Replace By Fee policy: Your node will preferentially mine and relay transactions paying the highest fee, regardless of receive order
net-p2p/bitcoind:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoind:upnp - Enable Universal Plug and Play
net-p2p/bitcoind:wallet - Enable wallet support
net-p2p/bitcoind:zeromq - Report blocks and transactions via zeromq
net-p2p/deluge:console - Enable default console UI
net-p2p/deluge:webinterface - Install dependencies needed for the web interface
net-p2p/ktorrent:bwscheduler - Schedule upload and download limits over a period of a week
net-p2p/ktorrent:downloadorder - Specify the download order of a multi-file torrent
net-p2p/ktorrent:infowidget - Displays general information about a torrent in several tabs
net-p2p/ktorrent:ipfilter - Filter IP addresses through a blocklist
net-p2p/ktorrent:kross - Enable kross scripting support
net-p2p/ktorrent:logviewer - Displays the logging output
net-p2p/ktorrent:magnetgenerator - Generates magnet URI's
net-p2p/ktorrent:mediaplayer - Phonon-based media player
net-p2p/ktorrent:rss - Syndication plugin for KTorrent, supporting RSS and Atom feeds
net-p2p/ktorrent:scanfolder - Scan folders for torrent files and load them
net-p2p/ktorrent:search - Search for torrents
net-p2p/ktorrent:shutdown - Shutdown when done
net-p2p/ktorrent:stats - Shows statistics about torrents in several graphs
net-p2p/ktorrent:upnp - Forward ports using UPnP
net-p2p/ktorrent:zeroconf - Discover peers on the local network using the Zeroconf protocol
net-p2p/mldonkey:bittorrent - enable bittorrent support
net-p2p/mldonkey:fasttrack - enable fasttrack support
net-p2p/mldonkey:gnutella - enable gnutella and gnutella2 support
net-p2p/mldonkey:guionly - enable client build only
net-p2p/mldonkey:magic - enable use of libmagic
net-p2p/qbittorrent:webui - Enable the Web UI
net-p2p/retroshare:cli - Enables the CLI version of RetroShare
net-p2p/retroshare:control-socket - Enables API via Unix socket support
net-p2p/retroshare:feedreader - Enables the Feedreader plugin
net-p2p/retroshare:gnome-keyring - Enables potentially insecure autologin capability via Gnome Keyring
net-p2p/retroshare:gui - Enables the GUI version of RetroShare
net-p2p/retroshare:settings-api - Enables settings control via API
net-p2p/retroshare:sqlcipher - Enables GXS database encryption via SQLCipher
net-p2p/retroshare:voip - Enables VOIP plugin
net-p2p/retroshare:webui - Enables Web interface and API support
net-p2p/rtorrent:daemon - Uses app-misc/screen to daemonize this application
net-p2p/syncthing:tools - Install stdiscosrv, strelaysrv and other tools to /usr/libexec/syncthing/.
net-p2p/transmission:lightweight - Optimize transmission for low-resource systems (smaller cache size, prefer unencrypted peer connections, etc.)
net-p2p/transmission:mbedtls - Use mbed TLS instead of OpenSSL
net-p2p/transmission:xfs - Enable XFS filesystem capabilities by using sys-fs/xfsprogs headers (in building of fdlimit(.c))
net-p2p/transmission-remote-gtk:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration.
net-print/cups:java - Add support for the Java interpeter in the web server CGIs.
net-print/cups:lprng-compat - Do not install lp... binaries so cups and lprng can coexist.
net-print/cups:python - Add support for the Python interpeter in the web server CGIs.
net-print/cups-filters:foomatic - Build the included foomatic-rip printer driver. Strongly recommended.
net-print/cups-filters:ipp_autosetup - Let cups-browsed automatically set up IPP network printers by default.
net-print/cups-filters:pclm - Enable PCLm support
net-print/fax4cups:efax - Install net-misc/efax backend
net-print/fax4cups:hylafax - Install net-misc/hylafax backend
net-print/fax4cups:mgetty-fax - Install net-dialup/mgetty backend
net-print/hplip:X - Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends
net-print/hplip:fax - Enable fax on multifunction devices which support it
net-print/hplip:hpcups - Build the hpcups driver for cups (by HP)
net-print/hplip:hpijs - Build the IJS driver for cups (Foomatic)
net-print/hplip:kde - Enables kde-misc/skanlite as scanner GUI with USE="scanner X"
net-print/hplip:libnotify - Enables desktop notifications
net-print/hplip:libusb0 - Depend on virtual/libusb SLOT 0. Some old printers do not work with virtual/libusb SLOT 1.
net-print/hplip:minimal - Only build internal hpijs/hpcups driver (not recommended at all, make sure you know what you are doing)
net-print/hplip:parport - Enable parallel port for devices which require it
net-print/hplip:scanner - Enable scanner on multifunction devices which support it
net-print/hplip:snmp - Add support for net-analyzer/net-snmp which enables this driver to work over networks (both for server and client)
net-print/hplip:static-ppds - Use statically-generated PPDs instead of Dynamic PPDs. Although this is deprecated some printers may still need it to work properly. Use this flag if hp-setup fails to find/create a valid PPD file
net-print/lprng:foomaticdb - Add support for the foomatic printing driver database
net-print/magicfilter:lprng-failsafe - Refuse options for compability with certain LPRng versions.
net-proxy/haproxy:51degrees - Device Detection using 51 Degrees
net-proxy/haproxy:device-atlas - Use dev-libs/device-atlas-api-c library
net-proxy/haproxy:net_ns - Enable network namespace support (CONFIG_NET_NS)
net-proxy/haproxy:pcre-jit - Use JIT support for PCRE
net-proxy/haproxy:pcre2 - Enable PCRE2 RegEx support
net-proxy/haproxy:pcre2-jit - Use JIT support for PCRE2
net-proxy/haproxy:slz - Use dev-libs/libslz compression library
net-proxy/haproxy:tools - Install additional tools (halog, iprange)
net-proxy/haproxy:wurfl - Device Detection using WURFL
net-proxy/privoxy:client-tags - Enable support for client-specific tags
net-proxy/privoxy:compression - Allow privoxy to compress buffered content before sending to the client, if it supports it
net-proxy/privoxy:editor - Enable the web-based actions file editor
net-proxy/privoxy:extended-host-patterns - Enable and require PCRE syntax in host patterns. You must convert action files to PCRE, see privoxy-url-pattern-translator.pl Use at your own risk!
net-proxy/privoxy:external-filters - Allow to filter content with scripts and programs. Experimental
net-proxy/privoxy:fast-redirects - Support fast redirects
net-proxy/privoxy:force - Allow single-page disable (force load)
net-proxy/privoxy:graceful-termination - Allow to shutdown Privoxy through the webinterface
net-proxy/privoxy:ie-images - Enable a quick but not always reliable auto-detect whether requests from MS Internet Explorer are for an image or not
net-proxy/privoxy:image-blocking - Allows the +handle-as-image action, to send "blocked" images instead of HTML
net-proxy/privoxy:lfs - Support large files (>2GB) on 32-bit systems
net-proxy/privoxy:png-images - Use PNG format instead of GIF for built-in images
net-proxy/privoxy:stats - Keep statistics
net-proxy/privoxy:toggle - Support temporary disable toggle via web interface
net-proxy/privoxy:tools - Install log parser, regression tester and user agent generator tools
net-proxy/privoxy:whitelists - Support trust files (white lists)
net-proxy/privoxy:zlib - Use sys-libs/zlib to decompress data before filtering
net-proxy/squid:ecap - Adds support for loadable content adaptation modules (http://www.e-cap.org)
net-proxy/squid:esi - Enable ESI for accelerators, will cause squid reverse proxies to be capable of the Edge Acceleration Specification (www.esi.org)
net-proxy/squid:htcp - Enable HTCP protocol
net-proxy/squid:ipf-transparent - Adds transparent proxy support for systems using IP-Filter (only for *bsd)
net-proxy/squid:kqueue - Enables *BSD kqueue() support
net-proxy/squid:logrotate - Use app-admin/logrotate for rotating logs
net-proxy/squid:pf-transparent - Adds transparent proxy support for systems using PF (only for *bsd)
net-proxy/squid:qos - Adds support for Quality of Service using netfilter conntrack - see qos_flow directive for more info
net-proxy/squid:ssl-crtd - Adds support for dynamic SSL certificate generation in SslBump environments
net-proxy/squid:tproxy - Enables real Transparent Proxy support for Linux Netfilter TPROXY
net-proxy/squid:wccp - Enable Web Cache Coordination Protocol
net-proxy/squid:wccpv2 - Enable Web Cache Coordination V2 Protocol
net-proxy/tinyproxy:filter-proxy - Enable filtering of domains/URLS
net-proxy/tinyproxy:reverse-proxy - Enable reverse proxying
net-proxy/tinyproxy:transparent-proxy - Enable transparent proxying
net-proxy/tinyproxy:upstream-proxy - Enable upstream proxying
net-proxy/tinyproxy:xtinyproxy-header - Include the X-Tinyproxy header
net-proxy/tsocks:dns - Force DNS queries to use SOCKS server via tcp
net-proxy/tsocks:envconf - Allow TSOCKS_CONF_FILE to specify configuration file
net-proxy/tsocks:server-lookups - Allow hostname resolution _for_ SOCKS servers
net-proxy/tsocks:tordns - Apply tordns patch which allows transparent TORification of the DNS queries
net-voip/telepathy-gabble:plugins - Enable plugin loader
net-vpn/badvpn:client - Build the badvpn-client program, a daemon that runs on endpoints of the VPN.
net-vpn/badvpn:ncd - Build NCD, a lightweight scripting language especially suited for network configurations.
net-vpn/badvpn:server - Build the badvpn-server program, a central server that manages the VPN network.
net-vpn/badvpn:tun2socks - Build tun2socks, a program which implements a TUN device that forwards TCP traffic through a SOCKS5 server.
net-vpn/badvpn:udpgw - Build udpgw, a small daemon which allows tun2socks to forward UDP traffic.
net-vpn/ipsec-tools:hybrid - Makes available both mode-cfg and xauth support
net-vpn/ipsec-tools:idea - Enable support for the IDEA algorithm
net-vpn/ipsec-tools:nat - Enable NAT-Traversal
net-vpn/ipsec-tools:rc5 - Enable support for the patented RC5 algorithm
net-vpn/ipsec-tools:stats - Enable statistics reporting
net-vpn/libreswan:dnssec - Use DNSSEC resolver (requires net-dns/unbound)
net-vpn/openconnect:gssapi - Build GSSAPI support
net-vpn/openconnect:java - Build JNI bindings using jni.h
net-vpn/openconnect:libproxy - Enable proxy support
net-vpn/openconnect:lz4 - Enable support for lz4 compression
net-vpn/openconnect:stoken - Enable stoken support
net-vpn/openvpn:down-root - Enable the down-root plugin
net-vpn/openvpn:iproute2 - Enabled iproute2 support instead of net-tools
net-vpn/openvpn:lz4 - Enable LZ4 support
net-vpn/openvpn:mbedtls - Use mbed TLS instead of OpenSSL
net-vpn/openvpn:pkcs11 - Enable PKCS#11 smartcard support
net-vpn/openvpn:plugins - Enable the OpenVPN plugin system
net-vpn/pptpd:gre-extreme-debug - Log all GRE accepted packages when in debug mode (required if you want upstream support)
net-vpn/strongswan:constraints - Enable advanced X.509 constraint checking plugin
net-vpn/strongswan:dhcp - Enable server support for querying virtual IP addresses for clients from a DHCP server. (IKEv2 only)
net-vpn/strongswan:eap - Enable support for the different EAP modules that are supported
net-vpn/strongswan:farp - Enable faking of ARP responses for virtual IP addresses assigned to clients (IKEv2 only)
net-vpn/strongswan:gcrypt - Enable dev-libs/libgcrypt plugin which provides 3DES, AES, Blowfish, Camellia, CAST, DES, Serpent and Twofish ciphers along with MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+). Also includes a software random number generator.
net-vpn/strongswan:non-root - Force IKEv1/IKEv2 daemons to normal user privileges. This might impose some restrictions mainly to the IKEv1 daemon. Disable only if you really require superuser privileges.
net-vpn/strongswan:openssl - Enable dev-libs/openssl plugin which is required for Elliptic Curve Cryptography (DH groups 19-21,25,26) and ECDSA. Also provides 3DES, AES, Blowfish, Camellia, CAST, DES, IDEA and RC5 ciphers along with MD2, MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+) dev-libs/openssl has to be compiled with USE="-bindist".
net-vpn/strongswan:pkcs11 - Enable pkcs11 support
net-vpn/strongswan:strongswan_plugins_aesni - Enable support for Intel AES-NI crypto plugin
net-vpn/strongswan:strongswan_plugins_blowfish - Enable support for the blowfish plugin
net-vpn/strongswan:strongswan_plugins_ccm - Enable support for the ccm plugin
net-vpn/strongswan:strongswan_plugins_chapoly - Enable ChaCha20/Poly1305 AEAD implementation and ChaCha20 XOF plugin
net-vpn/strongswan:strongswan_plugins_ctr - Enable support for the ctr plugin
net-vpn/strongswan:strongswan_plugins_forecast - Enable multicast and broadcast forwarding plugin
net-vpn/strongswan:strongswan_plugins_gcm - Enable support for the gcm plugin
net-vpn/strongswan:strongswan_plugins_ha - Enable support for the ha plugin
net-vpn/strongswan:strongswan_plugins_ipseckey - Enable support for the ipseckey plugin
net-vpn/strongswan:strongswan_plugins_led - Enable support for the led plugin
net-vpn/strongswan:strongswan_plugins_lookip - Enable support for the lookip plugin
net-vpn/strongswan:strongswan_plugins_newhope - Enable plugin that allows key exchange based on post-quantum computer New Hope algorithm
net-vpn/strongswan:strongswan_plugins_ntru - Enable support for the ntru plugin
net-vpn/strongswan:strongswan_plugins_padlock - Enable support for the padlock plugin
net-vpn/strongswan:strongswan_plugins_rdrand - Enable support for the rdrand plugin
net-vpn/strongswan:strongswan_plugins_save-keys - Enable plugin that saves IKE and/or ESP keys to files compatible with Wireshark (for debugging)
net-vpn/strongswan:strongswan_plugins_systime-fix - Enable support for the systime-fix plugin
net-vpn/strongswan:strongswan_plugins_unbound - Enable support for the unbound plugin
net-vpn/strongswan:strongswan_plugins_unity - Enable support for the unity plugin
net-vpn/strongswan:strongswan_plugins_vici - Enable support for the vici plugin
net-vpn/strongswan:strongswan_plugins_whitelist - Enable support for the whitelist plugin
net-vpn/tor:scrypt - Use app-crypt/libscrypt for the scrypt algorithm
net-vpn/tor:tor-hardening - Compile tor with hardening on vanilla compilers/linkers
net-vpn/tor:web - Build a tor2web service instead of a tor client
net-vpn/tor:zstd - Use app-arch/zstd for compression
net-vpn/vpnc:resolvconf - Enable support for DNS managing framework net-dns/openresolv
net-wireless/aircrack-ng:airdrop-ng - Build airdrop-ng
net-wireless/aircrack-ng:airgraph-ng - Build airgraph-ng
net-wireless/aircrack-ng:experimental - Build the "experimental" tools which may randomly fail to run properly
net-wireless/aircrack-ng:netlink - Use netlink for channel control instead of WEXT
net-wireless/aircrack-ng:unstable - Build the "unstable" tools which may randomly fail to run properly
net-wireless/bluez:btpclient - Enable BTP client
net-wireless/bluez:deprecated - Build deprecated plugins
net-wireless/bluez:experimental - Build experimental plugins
net-wireless/bluez:extra-tools - Install tools that upstream doesn't install on purpose by default. All this tools shouldn't be used. Then, please notify upstream about you still need them to let them know the situation.
net-wireless/bluez:mesh - Add support for Bluetooth Mesh control application and advertising bearer.
net-wireless/bluez:obex - Enable OBEX transfer support.
net-wireless/bluez:test-programs - Install tools for testing of various Bluetooth functions
net-wireless/bluez:user-session - Allow compatibility with user-session semantics for session bus under systemd
net-wireless/crda:gcrypt - Use libgcrypt instead of openssl for key checking
net-wireless/hostapd:crda - Add CRDA support
net-wireless/hostapd:internal-tls - Use internal TLSv1 implementation instead of depending on OpenSSL, LibreSSL or GnuTLS
net-wireless/hostapd:logwatch - Install support files for sys-apps/logwatch
net-wireless/hostapd:netlink - Adding support for using netlink to create VLANs
net-wireless/hostapd:sqlite - Adding sqlite support
net-wireless/hostapd:wps - Add support for Wi-Fi Protected Setup
net-wireless/kismet:client - Build the ncurses-based user interface
net-wireless/kismet:mousejack - Add support for mousejack hardware using dev-libs/libusb
net-wireless/kismet:pcre - Build with pcre support
net-wireless/kismet:plugin-autowep - Build the autowep plugin
net-wireless/kismet:plugin-btscan - Build the btscan plugin
net-wireless/kismet:plugin-dot15d4 - Build the dot15d4 plugin
net-wireless/kismet:plugin-ptw - Build the ptw plugin
net-wireless/kismet:plugin-spectools - Build the spectools plugin. This uses net-wireless/spectools
net-wireless/kismet:plugin-syslog - Build the syslog plugin.
net-wireless/kismet:ruby - Build extras which are written in ruby, example plugins and the like.
net-wireless/kismet:speech - Audio support using app-accessibility/flite
net-wireless/kismet:suid - Install a setuid root helper binary with limited functionality; this allows running kismet as a normal user, significantly reducing security risks
net-wireless/spectools:debug - Build the raw output client for spectools. (for developers)
net-wireless/spectools:gtk - Build the gtk-2 based client for spectools
net-wireless/spectools:ncurses - Build the ncurses based client for spectools
net-wireless/wepattack:john - Build with app-crypt/johntheripper support
net-wireless/wireless-tools:multicall - Build the most commonly used tools as one binary
net-wireless/wpa_supplicant:ap - Add support for access point mode
net-wireless/wpa_supplicant:eap-sim - Add support for EAP-SIM authentication algorithm
net-wireless/wpa_supplicant:eapol_test - Build and install eapol_test binary
net-wireless/wpa_supplicant:fasteap - Add support for FAST-EAP authentication algorithm
net-wireless/wpa_supplicant:hs2-0 - Add support for 802.11u and Passpoint for HotSpot 2.0
net-wireless/wpa_supplicant:p2p - Add support for Wi-Fi Direct mode
net-wireless/wpa_supplicant:privsep - Enable wpa_priv privledge separation binary
net-wireless/wpa_supplicant:ps3 - Add support for ps3 hypervisor driven gelic wifi
net-wireless/wpa_supplicant:smartcard - Add support for smartcards
net-wireless/wpa_supplicant:suiteb - Enable enable NSA Suite B encryption
net-wireless/wpa_supplicant:tdls - Add support for Tunneled Direct Link Setup (802.11z)
net-wireless/wpa_supplicant:uncommon-eap-types - Add support for GPSK, SAKE, GPSK_SHA256, IKEV2 and EKE
net-wireless/wpa_supplicant:wimax - Add support for Wimax EAP-PEER authentication algorithm
net-wireless/wpa_supplicant:wps - Add support for Wi-Fi Protected Setup
sci-astronomy/kstars:fits - Enable support for NASA's sci-libs/cfitsio library
sci-astronomy/kstars:indi - Enable support for Astronomical control library using libindi
sci-astronomy/kstars:wcs - Enable support for World Coordinate System library using wcslib
sci-astronomy/kstars:xplanet - Enable support for Xplanet
sci-astronomy/predict:xforms - Add a "map" client which uses the x11-libs/xforms library for its GUI
sci-astronomy/predict:xplanet - Project predict data onto world maps generated by x11-misc/xplanet / x11-misc/xearth
sci-astronomy/stellarium:media - Enable sound and video support
sci-astronomy/stellarium:stars - Install extra star catalogs
sci-astronomy/wcslib:fits - Enable support for the FITS format through sci-libs/cfitsio
sci-astronomy/wcslib:pgplot - Builds PGBSOX routines, needs sci-libs/pgplot library
sci-astronomy/wcslib:tools - Builds and installs extra command line utilities for WCS checking
sci-biology/bioperl:db - Install sci-biology/bioperl-run
sci-biology/bioperl:network - Install sci-biology/bioperl-run
sci-biology/bioperl:run - Install sci-biology/bioperl-run
sci-biology/plink:R - add support R language
sci-biology/plink:webcheck - add support for online update checking every time the program starts
sci-biology/seqan:tools - Build and install SeqAn commandline tools, such as the Yara aligner
sci-calculators/units:units_cur - Install the units_cur python script that updates currencies
sci-chemistry/apbs:fast - APBS fast mode (experimental)
sci-chemistry/apbs:fetk - Include support for FeTK
sci-chemistry/apbs:iapbs - C/C++/Fortran interface
sci-chemistry/apbs:tools - Install optional tools
sci-chemistry/chemtool:emf - EMF export support
sci-chemistry/cns:aria - Support patch for sci-chemistry/aria
sci-chemistry/eden:double-precision - More precise calculations at the expense of speed
sci-chemistry/gromacs:boost - Enable external boost library
sci-chemistry/gromacs:cuda - Enable cuda non-bonded kernels
sci-chemistry/gromacs:double-precision - More precise calculations at the expense of speed
sci-chemistry/gromacs:gmxapi - Add support for gmxapi library
sci-chemistry/gromacs:hwloc - Enable HWLoc lib support
sci-chemistry/gromacs:lmfit - Use external sci-libs/lmfit
sci-chemistry/gromacs:make-symlinks - Create symbolic links for pre-5.0 binary names
sci-chemistry/gromacs:mkl - Use sci-libs/mkl for fft, blas, lapack routines
sci-chemistry/gromacs:offensive - Enable gromacs partly offensive quotes
sci-chemistry/gromacs:opencl - Enable opencl non-bonded kernels
sci-chemistry/gromacs:single-precision - Single precision version of gromacs (default)
sci-chemistry/gromacs:tng - Enable new trajectory format - tng
sci-chemistry/mopac7:gmxmopac7 - Add support library for gromacs
sci-chemistry/pdb2pqr:opal - Add web interface via opal
sci-chemistry/pdb2pqr:pdb2pka - Install experimental pdb2pka interface
sci-chemistry/pymol:web - Install Pymodule needed for web app support
sci-chemistry/raster3d:gd - libgd support for PNG and JPEG output
sci-chemistry/votca-csg:extras - Pull in extra applications from sci-chemistry/votca-csgapps
sci-chemistry/votca-csg:gromacs - Add support for gromacs file formats through sci-chemistry/gromacs
sci-electronics/geda:stroke - enable mouse gesture support
sci-electronics/gerbv:unit-mm - Set default unit for coordinates in status bar to mm
sci-electronics/gspiceui:schematics - Use sci-electronics/geda for schematics editing
sci-electronics/gspiceui:waveform - Use sci-electronics/gwave for waveform display
sci-electronics/gtkwave:fasttree - Enables experimental Fast SST Tree widget code.
sci-electronics/gtkwave:fatlines - Renders lines as double width in gtkwave.
sci-electronics/gtkwave:judy - Enables Judy array support.
sci-electronics/gtkwave:packed - Enables '#pragma pack' for data arrays (saves memory, costs time).
sci-electronics/kicad:github - Add github support into PCB editor
sci-electronics/kicad:i18n - Allow GUI internationalization through l10n_* use flags
sci-electronics/kicad:minimal - Build only binaries without parts library and examples
sci-electronics/kicad:ngspice - Enable circuit simulation
sci-electronics/kicad:occ - Enable viewing 3D rendering of designs via opencascade
sci-electronics/kicad:oce - Enable viewing 3D rendering of designs via OCE
sci-electronics/kicad:python - Enable python scripting support
sci-electronics/pcb:gcode - gcode file export
sci-electronics/pcb:gif - GIF graphics export
sci-electronics/pcb:jpeg - JPEG graphics export
sci-electronics/pcb:m4lib-png - Enable creating png previews for the m4 library
sci-electronics/pcb:nelma - NELMA file export
sci-electronics/pcb:png - PNG graphics export
sci-electronics/pcb:tk - Build tcl/tk graphical QFP footprint generator
sci-electronics/pcb:toporouter - Build toporouter
sci-electronics/pcb:xrender - Translucent PCB display for Motif/Lesstif GUI
sci-geosciences/gmt:gdal - Enable sci-libs/gdal library support
sci-geosciences/gmt:gmtfull - Full resolution bathymetry database
sci-geosciences/gmt:gmthigh - Add high resolution bathymetry database
sci-geosciences/gmt:gmttria - Non GNU triangulation method, more efficient
sci-geosciences/gmt:metric - Use SI (cm) units instead of US (inches) ones
sci-geosciences/gmt:mex - Enable compilation of mex supplement which requires Octave/Matlab
sci-geosciences/gmt:octave - Enable octave support
sci-geosciences/gpsbabel:gui - Enable the graphical user interface (requires dev-qt/qtwebengine)
sci-geosciences/gpsd:dbus - export gpsd data over dbus connections
sci-geosciences/gpsd:latency_timing - support latency timing information
sci-geosciences/gpsd:ntp - Enable net-misc/ntp shared memory interface and PPS kernel support for GPS time
sci-geosciences/gpsd:shm - export gpsd over shared memory
sci-geosciences/gpsd:sockets - export gpsd over unix sockets
sci-geosciences/liblas:gdal - Add support for the sci-libs/gdal geospatial raster library
sci-geosciences/qgis:3d - Build QGIS 3D library using dev-qt/qt3d
sci-geosciences/qgis:georeferencer - Determines whether georeferencer plugin should be built
sci-geosciences/qgis:grass - Add support for sci-geosciences/grass
sci-geosciences/qgis:mapserver - Determines whether mapserver should be built
sci-geosciences/qgis:polar - Enable support for the polar coordinate system via x11-libs/qwtpolar
sci-geosciences/qgis:qml - Enable support Qml-based plugins using dev-qt/qtdeclarative
sci-geosciences/xtide:gps - Use sci-geosciences/gpsd
sci-libs/adolc:boost - Use the boost allocator from dev-libs/boost
sci-libs/adolc:sparse - Add support for sparse matrix algebra with sci-libs/colpack
sci-libs/armadillo:arpack - Link with sci-libs/arpack libraries for eigen decomposition
sci-libs/armadillo:mkl - Use matrix allocation from the Intel MKL sci-libs/mkl
sci-libs/armadillo:superlu - Use SuperLU for sparse linear equation solving sci-libs/superlu
sci-libs/armadillo:tbb - Use matrix allocation from the Threads Building Blocks dev-cpp/tbb
sci-libs/atlas:generic - Build atlas assuming a fairly generic architecture (sse2 for x86, core2 for amd64)
sci-libs/cddlib:tools - Add a few executables and tests for cddlib
sci-libs/cfitsio:tools - Build execs fpack, funpack, imcopy, fitscopy, listhead
sci-libs/cholmod:cuda - Use nvidia cuda toolkit for speeding up computations
sci-libs/cholmod:metis - Enable the Partition module to cholmod using sci-libs/metis
sci-libs/fftw:float - Link default library to single precision instead of double (symlinks only and fftw-2.1)
sci-libs/fftw:quad - Build quadruple precision lib
sci-libs/fftw:zbus - Adds support for ZBus cycle-counter of mips
sci-libs/flann:cuda - Enable support for nVidia CUDA
sci-libs/flann:octave - Add bindings for sci-mathematics/octave
sci-libs/gdal:armadillo - Use sci-libs/armadillo for faster TPS transform computation
sci-libs/gdal:aux_xml - Enable Portable Auxilliary Metadata generation
sci-libs/gdal:fits - Enable support for NASA's sci-libs/cfitsio library
sci-libs/gdal:geos - Add support for geometry engine (sci-libs/geos)
sci-libs/gdal:gml - Enable support for dev-libs/xerces-c C++ API
sci-libs/gdal:hdf5 - Add support for the Hierarchical Data Format v5 (sci-libs/hdf5)
sci-libs/gdal:mdb - Enable support for Microsoft Access database
sci-libs/gdal:ogdi - Enable support for the open geographic datastore interface (sci-libs/ogdi)
sci-libs/gdal:opencl - Enable OpenCL support
sci-libs/gdal:spatialite - Enable Spatial DBMS over sqlite dev-db/spatialite
sci-libs/gdal:xls - Add the dev-libs/freexl library for xls import support
sci-libs/gdal:zstd - Enable support for ZSTD compression using app-arch/zstd
sci-libs/gsl:cblas-external - Link gsl with external cblas provided by (virtual/cblas) instead of shipped internal version
sci-libs/gsl:deprecated - Enable deprecated functions
sci-libs/hdf5:fortran2003 - Enable new features that require Fortran 2003 (http://www.hdfgroup.org/HDF5/doc/fortran/NewFeatures_F2003.pdf)
sci-libs/hdf5:hl - Enable high level API (https://support.hdfgroup.org/HDF5/doc/HL/index.html)
sci-libs/lapack-reference:deprecated - Build deprecated routines
sci-libs/libsigrok:ftdi - Enable drivers that need libftdi
sci-libs/libsigrok:parport - Enable drivers that are parallel (IEEE1284) based
sci-libs/libsigrok:serial - Enable drivers that are serial (RS232) based
sci-libs/libsvm:tools - Install python based tool scripts for data selection and visualization with sci-visualization/gnuplot
sci-libs/linux-gpib:firmware - Install firmware
sci-libs/linux-gpib:isa - Build ISA kernel modules; from 3.12 on the setting is ignored and the decision based on the kernel configuration
sci-libs/mpir:cpudetection - Enables runtime cpudetection (useful for bindist, compatability on other CPUs)
sci-libs/netcdf:dap - Support for remote data access with the built-in OPeNDAP client
sci-libs/netcdf:hdf - Add support for the Hierarchical Data Format v.4 sci-libs/hdf
sci-libs/netcdf:tools - Build the utilities nccopy, ncgen and ncdump
sci-libs/nlopt:octave - Add plugin for sci-mathematics/octave
sci-libs/openfoam:opendx - Install opendx visualisation tool
sci-libs/openfoam:paraview - Enable support for paraview library
sci-libs/openfoam:src - Install source files
sci-libs/parmetis:double-precision - Floating-point operation done as double precision
sci-libs/parmetis:int64 - Build the 64 bits integer library (needed for > 2^31 vertices)
sci-libs/pastix:int64 - Build the 64 bits integer library
sci-libs/pastix:starpu - Build and link with dev-libs/starpu
sci-libs/scipy:sparse - Adds support for sparse solving with sci-libs/umfpack
sci-libs/scotch:int64 - Build the 64 bits integer library (needed for > 2^31 vertices)
sci-libs/scotch:tools - Build and install extra exec tools
sci-libs/spqr:metis - Use sci-libs/metis or sci-libs/parmetis for partitioning
sci-libs/spqr:tbb - Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/umfpack:cholmod - Use sci-libs/cholmod for matrix ordering
sci-libs/vtk:R - Enable support for dev-lang/R
sci-libs/vtk:all-modules - Build all modules
sci-libs/vtk:boost - Add support for boost
sci-libs/vtk:cg - Use nvidia's cg shaders
sci-libs/vtk:gdal - Support for gdal formated data
sci-libs/vtk:imaging - Building Imaging modules
sci-libs/vtk:json - Support for json formated data
sci-libs/vtk:kaapi - Use sci-libs/xkaapi to handle smp support
sci-libs/vtk:offscreen - Offscreen rendering through OSMesa
sci-libs/vtk:rendering - Building Redering modules
sci-libs/vtk:tbb - Use dev-cpp/tbb to handle smp support
sci-libs/vtk:views - Building Views modules
sci-libs/vtk:web - Install web component
sci-libs/vtk:xdmf2 - Support for xdmf2 formated data
sci-libs/xkaapi:blas - Kaapi BLAS tasks for PLASMA
sci-libs/xkaapi:gpu - Build library for gpu threading
sci-mathematics/cgal:mpfi - Enable support for multiple recision interval arithmetic via sci-libs/mpfi
sci-mathematics/cgal:ntl - Enable support for dev-libs/ntl
sci-mathematics/coq:camlp5 - Build using camlp5. This is required for some plugins like Ssreflect.
sci-mathematics/flint:gc - Enable garbage collection support via dev-libs/boehm-gc
sci-mathematics/flint:ntl - Build NTL interface
sci-mathematics/maxima:clisp - Compile maxima with GNU CLISP (dev-lisp/clisp)
sci-mathematics/maxima:clozurecl - Compile maxima with Clozure Common Lisp (dev-lisp/clozurecl)
sci-mathematics/maxima:cmucl - Compile maxima with CMU Common Lisp (dev-lisp/cmucl)
sci-mathematics/maxima:ecls - Compile maxima with Embeddable Common Lisp (dev-lisp/ecls)
sci-mathematics/maxima:gcl - Compile maxima with GNU Common Lisp (dev-lisp/gcl)
sci-mathematics/maxima:sbcl - Compile maxima with Steel Bank Common Lisp (dev-lisp/sbcl)
sci-mathematics/normaliz:extras - Install sci-mathematics/Macaulay2 and sci-mathematics/singularpackages as shipped by upstream
sci-mathematics/octave:glpk - Add support for sci-mathematics/glpk for linear programming
sci-mathematics/octave:gui - Enable the graphical user interface
sci-mathematics/octave:openssl - Use dev-libs/openssl for low level hash functions
sci-mathematics/octave:qhull - Add support for media-libs/qhull, to allow `delaunay', `convhull', and related functions
sci-mathematics/octave:qrupdate - Add support for sci-libs/qrupdatefor QR and Cholesky update functions
sci-mathematics/octave:sparse - Add enhanced support for sparse matrix algebra with SuiteSparse
sci-mathematics/singular:boost - Compile against external boost headers (dev-libs/boost)
sci-mathematics/unuran:prng - Use sci-mathematics/prng library
sci-mathematics/unuran:rngstreams - Use sci-mathematics/rngstreams library
sci-misc/nco:dap - Support for remote data access with the NETCDF DAP client
sci-misc/nco:ncap2 - Build next generation netcdf arithmetic processor (needs dev-java/antlr)
sci-misc/nco:udunits - Add sci-libs/udunits files support
sci-physics/bullet:bullet3 - Build Bullet 3
sci-physics/bullet:double-precision - Build libraries in double precision
sci-physics/bullet:extras - Build additional libraries
sci-physics/hepmc:cm - Build with cm instead of default mm for length units
sci-physics/hepmc:gev - Build with GeV instead of default MeV for momentum units
sci-physics/lammps:cuda - Enable cuda non-bonded kernels
sci-physics/lammps:lammps-memalign - Enables the use of the posix_memalign() call instead of malloc() when large chunks or memory are allocated by LAMMPS. Aliengnment is on 16 byte boundaries.
sci-physics/lhapdf:octave - Add bindings for sci-mathematics/octave
sci-physics/pythia:fastjet - Build jets using the sci-physics/fastjet package
sci-physics/pythia:hepmc - Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc
sci-physics/pythia:lhapdf - Support the use of external PDF sets via sci-physics/lhapdf
sci-physics/pythia:root - Use sci-physics/root trees and histograms (in examples only)
sci-visualization/gnuplot:bitmap - Enable dot-matrix printers and pbm terminal
sci-visualization/gnuplot:compat - Enable backwards compatibility with version 4 syntax
sci-visualization/gnuplot:gd - Add support for media-libs/gd. Needed for GIF, JPEG, and PNG image output.
sci-visualization/gnuplot:libcerf - Enable special functions from sci-libs/libcerf
sci-visualization/gnuplot:regis - Enable ReGIS terminal
sci-visualization/gwyddion:fits - Enable FITS image import via sci-libs/cfitsio
sci-visualization/gwyddion:sourceview - Enable support for x11-libs/gtksourceview
sci-visualization/opendx:cdf - Add support for sci-libs/cdf data exchange format
sci-visualization/opendx:hdf - Add support for the Hierarchical Data Format (sci-libs/hdf)
sec-policy/selinux-base:open_perms - Enable the open permissions for file object classes (SELinux policy capability).
sec-policy/selinux-base:peer_perms - Enable the labeled networking peer permissions (SELinux policy capability).
sec-policy/selinux-base:ubac - Enable User Based Access Control (UBAC) in the SELinux policy
sec-policy/selinux-base:unconfined - Enable support for the unconfined SELinux module
sec-policy/selinux-base-policy:unconfined - Enable support for the unconfined SELinux policy module
sys-apps/accountsservice:elogind - Use sys-auth/elogind instead of sys-auth/consolekit for session tracking
sys-apps/accountsservice:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for session tracking
sys-apps/baselayout:split-usr - Enable this if /bin and /usr/bin are separate directories
sys-apps/busybox:make-symlinks - Create all the appropriate symlinks in /bin and /sbin.
sys-apps/busybox:math - Enable math support in gawk (requires libm)
sys-apps/busybox:mdev - Create the appropriate symlink in /sbin and install mdev.conf and support files
sys-apps/busybox:sep-usr - Support a separate /usr without needing an initramfs by booting with init=/ginit
sys-apps/busybox:static - Make the system rescue shell (/bin/bb) static so you can recover even when glibc is broken
sys-apps/busybox:systemd - Support systemd
sys-apps/coreutils:caps - Add Linux capabilities support in output of file utilities (ls, dir, ...) via sys-libs/libcap
sys-apps/coreutils:hostname - Build the hostname program
sys-apps/coreutils:kill - Build the kill program
sys-apps/coreutils:multicall - Build all tools into a single `coreutils` program akin to busybox to save space
sys-apps/coreutils:split-usr - Enable this if /bin and /usr/bin are separate directories
sys-apps/dbus:elogind - Use sys-auth/elogind for session tracking.
sys-apps/dbus:systemd - Build with sys-apps/systemd at_console support
sys-apps/dbus:user-session - Enable user-session semantics for session bus under systemd
sys-apps/debianutils:installkernel - Install /sbin/installkernel script (for Linux)
sys-apps/dstat:wifi - Enable wireless network functions
sys-apps/dtc:valgrind - Use dev-util/valgrind in test phase
sys-apps/elfix:ptpax - Enable PT_PAX_FLAGS support.
sys-apps/elfix:xtpax - Enable XATTR_PAX_FLAGS support.
sys-apps/etckeeper:bazaar - Support dev-vcs/bzr based repository
sys-apps/etckeeper:cron - Install cron script
sys-apps/firejail:apparmor - Enable support for custom AppArmor profiles
sys-apps/firejail:bind - Enable custom bind mounts
sys-apps/firejail:chroot - Enable chrooting to custom directory
sys-apps/firejail:contrib - Install contrib scripts
sys-apps/firejail:file-transfer - Enable file transfers between sandboxes and the host system
sys-apps/firejail:network - Enable networking features
sys-apps/firejail:network-restricted - Grant access to --interface, --net=ethXXX and --netfilter only to root user; regular users are only allowed --net=none
sys-apps/firejail:seccomp - Enable system call filtering
sys-apps/firejail:userns - Enable attaching a new user namespace to a sandbox (--noroot option)
sys-apps/firejail:x11 - Enable X11 sandboxing
sys-apps/firejail-lts:seccomp - Enable system call filtering
sys-apps/flashrom:atahpt - Highpoint (HPT) ATA/RAID controller support
sys-apps/flashrom:atapromise - Support for Promise PDC2026x (FastTrak/Ultra)
sys-apps/flashrom:atavia - Support for VIA VT6421A SATA controllers
sys-apps/flashrom:bitbang_spi - Bitbanging SPI infrastructure
sys-apps/flashrom:buspirate_spi - Enable Bus Pirate SPI programmer
sys-apps/flashrom:ch341a_spi - Enable WCH CH341A SPI programmer
sys-apps/flashrom:dediprog - Dediprog SF100 support
sys-apps/flashrom:developerbox_spi - Enable Devloperbox SPI recovery support
sys-apps/flashrom:digilent_spi - Enable support for Digilent iCEblink40 development board
sys-apps/flashrom:drkaiser - Enable Dr. Kaiser programmer
sys-apps/flashrom:dummy - Enable dummy tracing
sys-apps/flashrom:ft2232_spi - Enable ftdi programmer, flashing through FTDI/SPI USB interface
sys-apps/flashrom:gfxnvidia - Enable NVIDIA programmer
sys-apps/flashrom:internal - Enable internal/onboard support
sys-apps/flashrom:internal_dmi - Enable internal DMI decoding rather than use sys-apps/dmidecode
sys-apps/flashrom:it8212 - Support for ITE IT8212F ATA/RAID controllers
sys-apps/flashrom:linux_mtd - Enable support for Linux mtd SPI flash devices
sys-apps/flashrom:linux_spi - Enable support for Linux userspace spidev interface
sys-apps/flashrom:mstarddc_spi - Support for SPI flash ROMs accessible through DDC in MSTAR-equipped displays
sys-apps/flashrom:nic3com - Enable 3Com NIC programmer
sys-apps/flashrom:nicintel - Support for Intel NICs
sys-apps/flashrom:nicintel_eeprom - Support for EEPROMs on Intel Gigabit network cards
sys-apps/flashrom:nicintel_spi - Support for SPI on Intel NICs
sys-apps/flashrom:nicnatsemi - Support for National Semiconductor NICs
sys-apps/flashrom:nicrealtek - Support for Realtek NICs
sys-apps/flashrom:ogp_spi - Enable support for OGP (Open Graphics Project) SPI flashing
sys-apps/flashrom:pickit2_spi - SUpport for SPI flash ROMs accessible via Microchip PICkit2
sys-apps/flashrom:pony_spi - Enable support for SI-Prog like hardware by Lancos
sys-apps/flashrom:rayer_spi - RayeR SPIPGM hardware support
sys-apps/flashrom:satamv - Enable programmer for Marvell SATA controllers
sys-apps/flashrom:satasii - Enable programmer for SiI SATA controllers
sys-apps/flashrom:serprog - Enable Serial Flasher programmer
sys-apps/flashrom:tools - Install additional tools
sys-apps/flashrom:usbblaster - Enable support for Altera USB-Blaster dongles
sys-apps/flashrom:usbblaster_spi - Enable support for Altera USB-Blaster dongles
sys-apps/flashrom:wiki - Enable wiki informations, like supported devices etc.
sys-apps/gawk:forced-sandbox - Always enable --sandbox mode for simpler/secure runtime (disables e/r/w commands)
sys-apps/gawk:mpfr - use mpfr for high precision arithmetic (-M / --bignum)
sys-apps/gnome-disk-utility:fat - Include FAT16/FAT32 support (sys-fs/dosfstools)
sys-apps/hwdata-gentoo:binary-drivers - Adds support for ATI/NVIDIA binary drivers
sys-apps/hwids:net - Install the oui.txt and iab.txt databases
sys-apps/hwids:pci - Install the pci.ids database
sys-apps/hwids:udev - Install hwdb.d rules for udev
sys-apps/hwids:usb - Install the usb.ids database
sys-apps/hwloc:cuda - Enable CUDA device discovery
sys-apps/hwloc:gl - Enable GL display device discovery (NVCtrl)
sys-apps/hwloc:numa - Add support for numa memory allocation
sys-apps/hwloc:pci - Enable PCI device discovery using libpci
sys-apps/hwloc:plugins - Build hwloc components as plugins so that the hwloc core library does not directly depend on their dependencies (for instance the libpci library)
sys-apps/iotools:make-symlinks - Generate sub-command symlinks to iotools -- note that a lot are simple like "xor"
sys-apps/ipmitool:openipmi - Use the system OpenIPMI implementation.
sys-apps/iproute2:berkdb - build programs that use berkdb (just arpd)
sys-apps/iproute2:elf - support loading eBPF programs from ELFs (e.g. LLVM's eBPF backend)
sys-apps/iproute2:iptables - include support for iptables filtering
sys-apps/iproute2:minimal - only install ip and tc programs, without eBPF support
sys-apps/irqbalance:numa - Support balancing IRQs across NUMA nodes
sys-apps/irqbalance:tui - Enable build of irqbalance terminal user interface
sys-apps/kexec-tools:booke - Include support for Book-E memory management
sys-apps/kexec-tools:lzma - Enables support for LZMA compressed kernel images
sys-apps/kexec-tools:xen - Enable extended xen support
sys-apps/kmod:lzma - Enable support for XZ compressed modules
sys-apps/kmod:tools - Install module loading/unloading tools.
sys-apps/kmod:zlib - Enable support for gzipped modules
sys-apps/lm_sensors:contrib - Installs user contributed configuration files so you don't need to find settings on your own for your system if somebody else has already created such a configuration for sensors/mainboards you are using.
sys-apps/lm_sensors:sensord - Enable sensord - a daemon that can be used to periodically log sensor readings from hardware health-monitoring chips
sys-apps/man-db:manpager - Enable manpager wrapper for colorizing output
sys-apps/mawk:forced-sandbox - Always enable -W sandbox mode for simpler/secure runtime
sys-apps/memtest86:serial - Compile with serial console support
sys-apps/memtest86+:boot - Also install to /boot instead of just /usr/share/memtest86+/
sys-apps/memtest86+:floppy - Install a script to create floppy disks containing memtest86+ binaries.
sys-apps/memtest86+:iso - Compile an ISO image
sys-apps/memtest86+:serial - Compile with serial console support
sys-apps/moreutils:perl - Install scripts written in Perl
sys-apps/net-tools:arp - build the arp and rarp tools (for manipulating the ARP cache)
sys-apps/net-tools:hostname - build the hostname and dnsdomainname tools
sys-apps/net-tools:plipconfig - build the plipconfig tool (for working with old PLIP hardware)
sys-apps/net-tools:slattach - build the slattach tool (for working with old serial ports)
sys-apps/nvme-cli:uuid - UUID support
sys-apps/openrc:netifrc - enable Gentoo's network stack (net.* scripts)
sys-apps/openrc:newnet - enable the new network stack (experimental)
sys-apps/pciutils:dns - Enable support for querying the central database of PCI IDs using DNS
sys-apps/pciutils:kmod - Enable sys-apps/kmod support for the -k switch in lspci command
sys-apps/pciutils:zlib - Support compressed pci.ids database
sys-apps/pcmciautils:staticsocket - Add support for static sockets
sys-apps/pcsc-lite:libusb - Use dev-libs/libusb detection to hotplug new smartcard readers. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.
sys-apps/pcsc-lite:policykit - Uses sys-auth/polkit to restrict access to smartcard readers or smartcars to given users.
sys-apps/pcsc-lite:udev - Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.
sys-apps/policycoreutils:audit - Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid())
sys-apps/portage:epydoc - Build html API documentation with epydoc.
sys-apps/portage:gentoo-dev - Enable features required for Gentoo ebuild development.
sys-apps/portage:ipc - Use inter-process communication between portage and running ebuilds.
sys-apps/portage:native-extensions - Compiles native "C" extensions (speedups, instead of using python backup code). Currently includes libc-locales. This should only be temporarily disabled for some bootstrapping operations. Cross-compilation is not supported.
sys-apps/portage:rsync-verify - Enable full-tree cryptographic verification of Gentoo repository rsync checkouts using app-portage/gemato.
sys-apps/portage:xattr - Preserve extended attributes (filesystem-stored metadata) when installing files. Usually only required for hardened systems.
sys-apps/qingy:consolekit - Enable native consolekit support
sys-apps/qingy:opensslcrypt - Encrypt communications between qingy and its GUI using dev-libs/openssl
sys-apps/ripgrep:man - Build and install man pages.
sys-apps/rng-tools:jitterentropy - Enable Jitter RNG entropy support
sys-apps/rng-tools:nistbeacon - Enable NIST beacon entropy support
sys-apps/sed:forced-sandbox - Always enable --sandbox mode for simpler/secure runtime (disables e/r/w commands). Note: This may break many configure scripts, so it should be avoided on dev systems (and generally used on binpkg/final systems only).
sys-apps/selinux-python:audit - Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid())
sys-apps/smartmontools:caps - Build against sys-libs/libcap-ng to allow smartd to drop its privileges.
sys-apps/smartmontools:daemon - Install the monitoring daemon (smartd) and associated scripts.
sys-apps/smartmontools:minimal - Do not install the monitoring daemon and associated scripts.
sys-apps/smartmontools:update_drivedb - Install a script to update the drivedb file.
sys-apps/systemd:apparmor - Enable AppArmor support
sys-apps/systemd:audit - Enable support for sys-process/audit
sys-apps/systemd:cryptsetup - Enable cryptsetup tools (includes unit generator for crypttab)
sys-apps/systemd:curl - Enable support for uploading journals
sys-apps/systemd:elfutils - Enable coredump stacktraces in the journal
sys-apps/systemd:gcrypt - Enable sealing of journal files using gcrypt
sys-apps/systemd:gnuefi - Enable EFI boot manager and stub loader (built using sys-boot/gnu-efi)
sys-apps/systemd:http - Enable embedded HTTP server in journald
sys-apps/systemd:importd - Enable import daemon
sys-apps/systemd:kmod - Enable kernel module loading via sys-apps/kmod
sys-apps/systemd:libidn2 - If IDN support is enabled, use net-dns/libidn2 instead of net-dns/libidn
sys-apps/systemd:lz4 - Enable lz4 compression for the journal
sys-apps/systemd:nat - Enable support for network address translation in networkd
sys-apps/systemd:qrcode - Enable qrcode output support in journal
sys-apps/systemd:resolvconf - Install resolvconf symlink for systemd-resolve
sys-apps/systemd:split-usr - Enable this if /bin and /usr/bin are separate directories
sys-apps/systemd:sysv-utils - Install sysvinit compatibility symlinks and manpages for init, telinit, halt, poweroff, reboot, runlevel, and shutdown
sys-apps/systemd:vanilla - Disable Gentoo-specific behavior and compatibility quirks
sys-apps/systemd:xkb - Depend on x11-libs/libxkbcommon to allow logind to control the X11 keymap
sys-apps/tcp-wrappers:netgroups - Support matching NIS (host) netgroup names via the @netgroup syntax (if you don't know what this means, you most likely do not need it)
sys-apps/timer_entropyd:debug - Enable printf debugging and logging to the syslog at DEBUG level
sys-apps/usb_modeswitch:jimtcl - Use dev-lang/jimtcl instead of dev-lang/tcl for smaller memory footprint
sys-apps/usermode-utilities:fuse - Build tools (currently umlmount) needing fuse
sys-apps/util-linux:caps - build setpriv helper (run programs with diff capabilities)
sys-apps/util-linux:cramfs - build mkfs/fsck helpers for cramfs filesystems
sys-apps/util-linux:fdformat - build fdformat (floppy disk format)
sys-apps/util-linux:kill - build the kill program
sys-apps/util-linux:pam - build runuser helper
sys-apps/util-linux:suid - install mount/umount as setuid so non-root users may mount/umount devices, and wall/write as setgid so non-root users can notify other users
sys-apps/util-linux:tty-helpers - install the mesg/wall/write tools for talking to local users
sys-apps/watchdog:nfs - enable support for checking nfs mounts
sys-apps/xinetd:rpc - support RPC services
sys-auth/consolekit:cgroups - Use the kernel to track processes instead of the session cookie.
sys-auth/consolekit:evdev - For handling VT switching with a session controller.
sys-auth/consolekit:pm-utils - Adds support for suspend/resume using sys-power/pm-utils
sys-auth/consolekit:policykit - Use the PolicyKit framework (sys-auth/polkit) to get authorization for suspend/shutdown.
sys-auth/consolekit:systemd-units - Install systemd unit files to replace the modern functionality of logind in sys-apps/systemd. Not recommended.
sys-auth/keystone:memcached - Installs dependencies needed for using memcached as a backend
sys-auth/keystone:mongo - Installs dependencies needed for using mongo as a backend
sys-auth/munge:gcrypt - Use libgcrypt instead of openssl
sys-auth/nss-pam-ldapd:pynslcd - Install the python implementation along with the standard implementation
sys-auth/nss-pam-ldapd:utils - Install the command-line utilities
sys-auth/pam_mktemp:prevent-removal - If supported, set EXT2_APPEND_FL on /tmp/.private to prevent temporary directories from being removed
sys-auth/pam_mysql:openssl - Use OpenSSL for md5 and sha1 support
sys-auth/pam_u2f:debug - Enable debug messages using the pam logging macros.
sys-auth/pambase:consolekit - Enable pam_ck_connector module on local system logins. This allows for console logins to make use of ConsoleKit authorization.
sys-auth/pambase:cracklib - Enable pam_cracklib module on system authentication stack. This produces warnings when changing password to something easily crackable. It requires the same USE flag to be enabled on sys-libs/pam or system login might be impossible.
sys-auth/pambase:debug - Enable debug information logging on syslog(3) for all the modules supporting this in the system authentication and system login stacks.
sys-auth/pambase:elogind - Use pam_elogind module to register user sessions with elogind.
sys-auth/pambase:gnome-keyring - Enable pam_gnome_keyring module on system login stack. This enables proper Gnome Keyring access to logins, whether they are done with the login shell, a Desktop Manager or a remote login systems such as SSH.
sys-auth/pambase:minimal - Disables the standard PAM modules that provide extra information to users on login; this includes pam_tally (and pam_tally2 for Linux PAM 1.1 and later), pam_lastlog, pam_motd and other similar modules. This might not be a good idea on a multi-user system but could reduce slightly the overhead on single-user non-networked systems.
sys-auth/pambase:mktemp - Enable pam_mktemp module on system auth stack for session handling. This module creates a private temporary directory for the user, and sets TMP and TMPDIR accordingly.
sys-auth/pambase:nullok - Enable the nullok option with the pam_unix module. This allows people to login with blank passwords.
sys-auth/pambase:pam_krb5 - Enable pam_krb5 module on system auth stack, as an alternative to pam_unix. If Kerberos authentication succeed, only pam_unix will be ignore, and all the other modules will proceed as usual, including Gnome Keyring and other session modules. It requires sys-libs/pam as PAM implementation.
sys-auth/pambase:pam_ssh - Enable pam_ssh module on system auth stack for authentication and session handling. This module will accept as password the passphrase of a private SSH key (one of ~/.ssh/id_rsa, ~/.ssh/id_dsa or ~/.ssh/identity), and will spawn an ssh-agent instance to cache the open key.
sys-auth/pambase:passwdqc - Enable pam_passwdqc module on system auth stack for password quality validation. This is an alternative to pam_cracklib producing warnings, rejecting or providing example passwords when changing your system password. It is used by default by OpenWall GNU/*/Linux and by FreeBSD.
sys-auth/pambase:securetty - Enable pam_securetty module in the login stack. Not generally relevant anymore as the login stack only refers to local logins and local terminals imply secure access in the first place.
sys-auth/pambase:sha512 - Switch Linux-PAM's pam_unix module to use sha512 for passwords hashes rather than MD5. This option requires sys-libs/pam version 1.0.1 built against sys-libs/glibc version 2.7, if it's built against an earlier version, it will silently be ignored, and MD5 hashes will be used. All the passwords changed after this USE flag is enabled will be saved to the shadow file hashed using SHA512 function. The password previously saved will be left untouched. Please note that while SHA512-hashed passwords will still be recognised if the USE flag is removed, the shadow file will not be compatible with systems using an earlier glibc version.
sys-auth/pambase:systemd - Use pam_systemd module to register user sessions in the systemd control group hierarchy.
sys-auth/polkit:elogind - Use sys-auth/elogind instead of sys-auth/consolekit for session tracking
sys-auth/polkit:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for session tracking
sys-auth/sssd:acl - Build and use the cifsidmap plugin
sys-auth/sssd:autofs - Build helper to let net-fs/autofs use sssd provided information
sys-auth/sssd:locator - Install sssd's Kerberos plugin
sys-auth/sssd:manpages - Build man pages with dev-libs/libxslt
sys-auth/sssd:netlink - Add support for netlink protocol via dev-libs/libnl
sys-auth/sssd:nfsv4 - Add support for the nfsv4 idmapd plugin provided by net-libs/libnfsidmap
sys-auth/sssd:ssh - Build helper to let net-misc/openssh use sssd provided information
sys-auth/sssd:sudo - Build helper to let app-admin/sudo use sssd provided information
sys-auth/ykpers:consolekit - Use sys-auth/consolekit and virtual/udev to allow access to the YubiKey HID device to the console user.
sys-block/f3:extra - Build the additional f3probe, f3brew and f3fix utility (requires sys-block/parted and virtual/udev)
sys-block/fio:aio - Enable AIO ioengine
sys-block/fio:glusterfs - Enable GlusterFS gfapi support via sys-cluster/glusterfs
sys-block/fio:gnuplot - Install tools for generating gnuplots
sys-block/fio:numa - Enable numa support
sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
sys-block/fio:rdma - Enable infiniband support via sys-fabric/librdmacm
sys-block/gparted:btrfs - Include Btrfs support (sys-fs/btrfs-progs)
sys-block/gparted:cryptsetup - Include LUKS volume support (sys-fs/cryptsetup)
sys-block/gparted:dmraid - Support for dmraid devices, also known as ATA-RAID, or Fake RAID.
sys-block/gparted:f2fs - Include F2FS support (sys-fs/f2fs-tools)
sys-block/gparted:fat - Include FAT16/FAT32 support (sys-fs/dosfstools)
sys-block/gparted:hfs - Include HFS support (sys-fs/hfsutils)
sys-block/gparted:jfs - Include JFS support (sys-fs/jfsutils)
sys-block/gparted:mdadm - Support for Linux software RAID.
sys-block/gparted:ntfs - Include NTFS support (sys-fs/ntfs3g)
sys-block/gparted:reiser4 - Include ReiserFS4 support (sys-fs/reiser4progs)
sys-block/gparted:reiserfs - Include ReiserFS support (sys-fs/reiserfsprogs)
sys-block/gparted:udf - Include UDF support (sys-fs/udftools)
sys-block/gparted:wayland - Enable interim workaround to allow running GParted under Wayland by granting permission to the X11 display using x11-apps/xhost.
sys-block/gparted:xfs - Include XFS support (sys-fs/xfsprogs, sys-fs/xfsdump)
sys-block/nbd:netlink - Add support for netlink protocol via dev-libs/libnl
sys-block/open-iscsi:rdma - Support iSCSI over RDMA
sys-block/open-iscsi:tcp - Support iSCSI over TCP
sys-block/parted:debug - Enable debugging as encouraged by upstream: [The default configuration] includes --enable-debug (by default), which contains many assertions. Obviously, these "waste" space, but in the past, they have caught potentially dangerous bugs before they would have done damage, so we think it's worth it. Also, it means we get more bug reports ;)
sys-block/parted:device-mapper - Enable device-mapper support from sys-fs/lvm2 in parted
sys-block/partimage:nologin - Do not include login support when connecting partimaged
sys-block/tgt:fcoe - Add support for FCoE protocol
sys-block/tgt:fcp - Add support for new FC protocol
sys-block/tgt:ibmvio - Add support for IBM Virtual I/O
sys-block/tgt:rbd - Add support for ceph block devices
sys-boot/grub:device-mapper - Enable support for device-mapper from sys-fs/lvm2
sys-boot/grub:efiemu - Build and install the efiemu runtimes
sys-boot/grub:fonts - Build and install fonts for the gfxterm module
sys-boot/grub:libzfs - Enable support for sys-fs/zfs
sys-boot/grub:mount - Build and install the grub-mount utility
sys-boot/grub:multislot - Allow concurrent installation of sys-boot/grub SLOT 0 and sys-boot/grub SLOT 2 by renaming all programs.
sys-boot/grub:netboot - Enable network booting
sys-boot/grub:themes - Build and install GRUB themes (starfield)
sys-boot/grub:truetype - Build and install grub-mkfont conversion utility
sys-boot/lilo:device-mapper - Enable support for device-mapper from sys-fs/lvm2
sys-boot/lilo:minimal - Do not install the dolilo helper script
sys-boot/lilo:pxeserial - Avoid character echo on PXE serial console
sys-boot/plymouth:gdm - Enables smooth transition to GDM
sys-boot/plymouth:libkms - Provides abstraction to the DRM drivers (intel, nouveau and vmwgfx at this moment)
sys-boot/plymouth:pango - Adds support for printing text on splash screen and text prompts, e.g. for password
sys-boot/plymouth:split-usr - Enable this if /bin and /usr/bin are separate directories
sys-boot/refind:btrfs - Builds the EFI binary btrfs filesystem driver
sys-boot/refind:ext2 - Builds the EFI binary ext2 filesystem driver
sys-boot/refind:ext4 - Builds the EFI binary ext4 filesystem driver
sys-boot/refind:gnuefi - Compile using GNU-EFI instead of Tianocore
sys-boot/refind:hfs - Builds the EFI binary hfs filesystem driver
sys-boot/refind:iso9660 - Builds the EFI binary iso9660 filesystem driver
sys-boot/refind:ntfs - Builds the EFI binary ntfs filesystem driver
sys-boot/refind:reiserfs - Builds the EFI binary reiserfs filesystem driver
sys-boot/woeusb:minimal - Install only woeusb tool
sys-cluster/ceph:babeltrace - Add support for LTTng babeltrace
sys-cluster/ceph:cephfs - Build support for cephfs, a POSIX compatible filesystem built on top of ceph
sys-cluster/ceph:cryptopp - Use dev-libs/crypto++ for cryptography
sys-cluster/ceph:dpdk - Enable DPDK messaging
sys-cluster/ceph:fuse - Build fuse client
sys-cluster/ceph:libaio - Use libaio as asynchronous input/output library
sys-cluster/ceph:libatomic - Use libatomic instead of builtin atomic operations
sys-cluster/ceph:lttng - Add support for LTTng
sys-cluster/ceph:mgr - Build the ceph-mgr daemon
sys-cluster/ceph:mgr-frontend - Build the mgr/dashboard frontend with npm, this is not required for the frontend to work
sys-cluster/ceph:nss - Use dev-libs/nss for cryptography
sys-cluster/ceph:radosgw - Add radosgw support
sys-cluster/ceph:system-boost - Use system dev-libs/boost instead of the bundled one
sys-cluster/ceph:xfs - Add xfs support
sys-cluster/ceph:zfs - Add zfs support
sys-cluster/cinder:api - Installs the initscripts for the cinder api service
sys-cluster/cinder:iscsi - Allow using an iSCSI remote storage server as pool for disk image storage
sys-cluster/cinder:lvm - Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage
sys-cluster/cinder:memcached - Installs the memcached server
sys-cluster/cinder:rdma - Enable rdma storage backend support
sys-cluster/cinder:scheduler - Installs the initscripts for the cinder scheduler service
sys-cluster/cinder:tcp - Enables tcp support for the iscsi backend
sys-cluster/cinder:tgt - Enable tgt storage backend support
sys-cluster/cinder:volume - Installs the initscripts for the cinder volume service
sys-cluster/cluster-glue:ipmilan - Install the ipmilan plugin (requires sys-libs/openipmi)
sys-cluster/cluster-glue:libnet - Force use of net-libs/libnet
sys-cluster/corosync:infiniband - Enable Infiniband RDMA transport support
sys-cluster/drbd-utils:heartbeat - Enable Heartbeat integration
sys-cluster/drbd-utils:pacemaker - Enable Pacemaker integration
sys-cluster/drbd-utils:xen - Enable Xen integration
sys-cluster/galera:garbd - Install Galera Arbitrator - a stateless daemon which acts as a lightweight group member
sys-cluster/glusterfs:bd-xlator - Enable the blockdevice translator (requires sys-fs/lvm2)
sys-cluster/glusterfs:crypt-xlator - Enable the encryption translator
sys-cluster/glusterfs:fuse - Add FUSE mount helper
sys-cluster/glusterfs:georeplication - Enable support for georeplication (requires dev-lang/python)
sys-cluster/glusterfs:glupy - Enable support for translators written in Python
sys-cluster/glusterfs:infiniband - Add support for Infiniband ibverbs transport. Libraries can be found in science overlay
sys-cluster/glusterfs:ipv6 - Use IPv6 by default, requires libtirpc
sys-cluster/glusterfs:libtirpc - Build against net-libs/libtirpc for RPC support
sys-cluster/glusterfs:qemu-block - Transparently create files as QCow2/QED images in the backend, including the possibility to snapshot.
sys-cluster/glusterfs:rsyslog - Install configuration snippet for app-admin/rsyslog
sys-cluster/glusterfs:systemtap - Enable support for dev-util/systemtap
sys-cluster/glusterfs:tiering - Enable support for data classification/tiering (requires dev-db/sqlite SLOT 3)
sys-cluster/heat:memcached - Installs the memcached server
sys-cluster/keepalived:json - compile with signal to dump configuration and stats as JSON.
sys-cluster/mpich:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/mpich:romio - Build the ROMIO MPI-IO component
sys-cluster/mpich2:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/mpich2:romio - Enable romio, a high-performance portable MPI-IO implementation
sys-cluster/neutron:compute-only - Only install things needed on compute hosts
sys-cluster/neutron:dhcp - Installs the initscripts for the neutron dhcp service
sys-cluster/neutron:haproxy - haproxy backend support
sys-cluster/neutron:l3 - Installs the initscripts for the neutron l3 agent service
sys-cluster/neutron:linuxbridge - Installs the initscripts for the neutron linuxbridge agent service
sys-cluster/neutron:metadata - Installs the initscripts for the neutron metadata agent service
sys-cluster/neutron:openvswitch - Installs the initscripts for the neutron openvswitch agent service
sys-cluster/neutron:server - Installs the initscripts for the neutron server service
sys-cluster/nova:compute - Installs the initscripts for the nova volume service
sys-cluster/nova:compute-only - only install stuff needed for a compute host
sys-cluster/nova:iscsi - Installs iscsi helper udev scripts
sys-cluster/nova:memcached - Installs the memcached server
sys-cluster/nova:novncproxy - Installs the initscripts for the nova novncproxy service
sys-cluster/nova:openvswitch - Installs openvswitch for the neutron openvswitch support
sys-cluster/nova:rabbitmq - Installs the rabbitmq server
sys-cluster/openmpi:cma - Enable the CMA (Cross Memory Attach) MCA
sys-cluster/openmpi:cuda - Add GPU direct support
sys-cluster/openmpi:heterogeneous - Enable features required for heterogeneous platform support
sys-cluster/openmpi:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/openmpi:numa - Enable numactl to allow binding processes to CPUs
sys-cluster/openmpi:pbs - Add support for the Portable Batch System (PBS)
sys-cluster/openmpi:romio - Build the ROMIO MPI-IO component
sys-cluster/openmpi:vt - Enable bundled VampirTrace support
sys-cluster/pacemaker:cman - Enable cman support.
sys-cluster/pacemaker:heartbeat - Enable sys-cluster/heartbeat support.
sys-cluster/pacemaker:smtp - Enable SMTP support via net-libs/libesmtp
sys-cluster/resource-agents:libnet - Force use of net-libs/libnet
sys-cluster/resource-agents:rgmanager - Install resources for rgmanager
sys-cluster/swift:account - adds swift account support
sys-cluster/swift:container - adds swift container support
sys-cluster/swift:memcached - adds memcached support
sys-cluster/swift:object - adds swift object support
sys-cluster/swift:proxy - adds swift proxy support
sys-cluster/torque:autorun - Enable the AUTORUN_JOBS codebase
sys-cluster/torque:cgroups - Enable pbs_mom to use linux cgroups to isolate jobs
sys-cluster/torque:cpusets - Enable pbs_mom to utilize linux cpusets if available
sys-cluster/torque:drmaa - Enable the Distributed Resource Management Application API
sys-cluster/torque:munge - Enable authentication via munge
sys-cluster/torque:nvidia - Enable management of Nvidia GPUs
sys-cluster/torque:quickcommit - Enable the QUICKCOMMIT codebase
sys-cluster/torque:server - Enable compilation of pbs_server and pbs_sched
sys-cluster/vzctl:ploop - Add support for ploop devices via sys-cluster/ploop
sys-cluster/vzctl:vzmigrate - Add support for container migration
sys-devel/autogen:libopts - install the libopts tarball (a few packages want this for developing)
sys-devel/bc:forced-sandbox - Always enable --sandbox mode for simpler/secure runtime (disables the ! command in dc)
sys-devel/binutils:multitarget - Adds support to binutils for cross compiling (does not work with gas)
sys-devel/clang:default-compiler-rt - Use compiler-rt instead of libgcc as the default rtlib for clang
sys-devel/clang:default-libcxx - Use libc++ instead of libstdc++ as the default stdlib for clang
sys-devel/clang:multitarget - Build all host targets (default: host only)
sys-devel/clang:static-analyzer - Install the Clang static analyzer
sys-devel/clang:z3 - Enable the static analyzer constraint manager backend using sci-mathematics/z3
sys-devel/clang-runtime:compiler-rt - Install sys-libs/compiler-rt for -rtlib=compiler-rt
sys-devel/clang-runtime:crt - Require a package providing crt*.o files to make it possible to build software without GCC installed
sys-devel/clang-runtime:libcxx - Install sys-libs/libcxx for -stdlib=libc++
sys-devel/clang-runtime:openmp - Install sys-libs/libomp for -fopenmp support
sys-devel/clang-runtime:sanitize - Enable compiler-rt sanitizer (-fsanitize*) support
sys-devel/distcc:crossdev - Enable support for sys-devel/crossdev
sys-devel/distcc:gssapi - Enable support for net-libs/libgssglue
sys-devel/gcc:awt - Useful only when building GCJ, this enables Abstract Window Toolkit (AWT) peer support on top of GTK+
sys-devel/gcc:boundschecking - Add the bounds checking patch by Haj Ten Brugge, this will DISABLE the hardened PIE+SSP patches
sys-devel/gcc:cilk - Support the Cilk Plus language (C/C++ based languages for parallel programming)
sys-devel/gcc:d - Enable support for the D programming language
sys-devel/gcc:fixed-point - Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
sys-devel/gcc:go - Build the GCC Go language frontend.
sys-devel/gcc:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation
sys-devel/gcc:jit - Enable libgccjit so other applications can embed gcc for Just-In-Time compilation. This will slow down the compiler a bit as it forces all of the toolchain to be shared libs.
sys-devel/gcc:libssp - Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)
sys-devel/gcc:mpx - Enable support for Intel Memory Protection Extensions (MPX)
sys-devel/gcc:mudflap - Add support for mudflap, a pointer use checking library
sys-devel/gcc:nopie - Disable PIE support (NOT FOR GENERAL USE)
sys-devel/gcc:nossp - Disable SSP support (NOT FOR GENERAL USE)
sys-devel/gcc:objc - Build support for the Objective C code language
sys-devel/gcc:objc++ - Build support for the Objective C++ language
sys-devel/gcc:objc-gc - Build support for the Objective C code language Garbage Collector
sys-devel/gcc:pgo - Build GCC using Profile Guided Optimization (PGO)
sys-devel/gcc:regression-test - Run the testsuite and install the results (requires FEATURES=test)
sys-devel/gcc:sanitize - Build support for various sanitizer functions (ASAN/TSAN/etc...)
sys-devel/gcc:ssp - Build packages with stack smashing protector on by default
sys-devel/gcc:systemtap - enable systemtap static probe points
sys-devel/gcc:vtv - Build support for virtual table verification (a C++ hardening feature)
sys-devel/gdb:client - Install the main "gdb" program (most people want this)
sys-devel/gdb:lzma - Support lzma compression in ELF debug info
sys-devel/gdb:multitarget - Support all known targets in one gdb binary
sys-devel/gdb:python - Enable support for the new internal scripting language, as well as extended pretty printers
sys-devel/gdb:server - Install the "gdbserver" program (useful for embedded/remote targets)
sys-devel/gdb:xml - Support parsing XML data files needed (at least) for cpu features, memory maps, and syscall tracing
sys-devel/gettext:cvs - When running `autopoint`, use cvs to store the internal development files; this requires cvs at runtime, but will be faster/smaller than raw archives
sys-devel/gettext:git - When running `autopoint`, use git to store the internal development files; this requires git at runtime, but will be faster/smaller than raw archives
sys-devel/llvm:clang - Build the clang C/C++ compiler
sys-devel/llvm:default-compiler-rt - Use compiler-rt instead of libgcc as the default rtlib for clang
sys-devel/llvm:default-libcxx - Use libc++ instead of libstdc++ as the default stdlib for clang
sys-devel/llvm:doc - Build and install the HTML documentation and regenerate the man pages
sys-devel/llvm:exegesis - Enable performance counter support for llvm-exegesis tool that can be used to measure host machine instruction characteristics
sys-devel/llvm:gold - Build the gold linker plugin
sys-devel/llvm:lldb - Build the lldb debugger
sys-devel/llvm:multitarget - Build all host targets (default: host only)
sys-devel/llvm:ncurses - Support querying terminal properties using ncurses' terminfo
sys-devel/llvm:sanitize - Build compiler-rt's sanitizers
sys-devel/llvm:static-analyzer - Install the Clang static analyzer (requires USE=clang)
sys-devel/llvm:xar - Support dumping LLVM bitcode sections in Mach-O files (uses app-arch/xar)
sys-fabric/ofed:dapl - Add support for DAPL abstraction layer
sys-fabric/ofed:diags - Add dignostic tools for infiniband
sys-fabric/ofed:ibacm - Add support for userspace pre-connection services
sys-fabric/ofed:opensm - Add OpenSM - Subnet manager for infiniband
sys-fabric/ofed:perftest - Add perftest utils
sys-fabric/ofed:qperf - Add rdma tests
sys-fabric/ofed:rds - Tools to manage rds sockets
sys-fabric/ofed:srp - Suport for userspace part for srp initiator
sys-fabric/opensm:tools - Install ssld extra tool
sys-firmware/edk2-ovmf:binary - Use pre-built binaries
sys-firmware/intel-microcode:hostonly - only install ucode(s) supported by currently available (=online) processor(s)
sys-firmware/intel-microcode:initramfs - install a small initramfs for use with CONFIG_MICROCODE_EARLY
sys-firmware/intel-microcode:split-ucode - install the split binary ucode files (used by the kernel directly)
sys-firmware/intel-microcode:vanilla - install only microcode updates from Intel's official microcode tarball
sys-firmware/ipxe:binary - Use pre-built binaries
sys-firmware/ipxe:efi - Build an EFI program for using PXE
sys-firmware/ipxe:iso - Build a bootable ISO for using PXE
sys-firmware/ipxe:lkrn - Build a linux kernel bootable file for using with grub/etc...
sys-firmware/ipxe:qemu - Build the required PXE ROM images for app-emulation/qemu
sys-firmware/ipxe:undi - Build a Universal Network Device Interface driver chainloading your existing PXE NIC into iPXE
sys-firmware/ipxe:usb - Build a bootable USB image for using PXE
sys-firmware/ipxe:vmware - Build the PXE ROM images that VMWare uses
sys-firmware/seabios:binary - Use official upstream pre-built binaries
sys-firmware/seabios:seavgabios - Include SeaVGABIOS binaries (replacement for vgabios)
sys-firmware/sgabios:binary - Use pre-built binaries
sys-firmware/vgabios:binary - Use official upstream pre-built binaries (only default and cirrus images)
sys-fs/btrfs-progs:convert - Build ext2 conversion utility (btrfs-convert)
sys-fs/btrfs-progs:reiserfs - Enable reiserfs support in btrfs-convert tool.
sys-fs/btrfs-progs:static - Build static binaries in addition to the dynamic ones
sys-fs/btrfs-progs:zstd - Enable zstd compression support.
sys-fs/btrfsmaintenance:systemd - Enable systemd services and timers instead of cron timers
sys-fs/cryfs:custom-optimization - Use user-defined compiler optimization level
sys-fs/cryfs:update-check - Enable automatic checking for updates and security vulnerabilities
sys-fs/cryptsetup:argon2 - Enable password hashing algorithm from app-crypt/argon2
sys-fs/cryptsetup:gcrypt - Use dev-libs/libgcrypt crypto backend
sys-fs/cryptsetup:kernel - Use kernel crypto backend (mainly for embedded systems)
sys-fs/cryptsetup:nettle - Use dev-libs/nettle crypto backend
sys-fs/cryptsetup:openssl - Use dev-libs/openssl crypto backend
sys-fs/cryptsetup:pwquality - Use dev-libs/libpwquality for password quality checking
sys-fs/cryptsetup:reencrypt - Build cryptsetup-reencrypt
sys-fs/cryptsetup:urandom - Use /dev/urandom instead of /dev/random
sys-fs/dmraid:dietlibc - Compile against dev-libs/dietlibc
sys-fs/dmraid:intel_led - Enable Intel LED support
sys-fs/dmraid:klibc - Compile against dev-libs/klibc
sys-fs/dmraid:led - Enable LED support
sys-fs/dmraid:mini - Create a minimal binary suitable for early boot environments
sys-fs/dosfstools:compat - Install symlinks for legacy names of the tools
sys-fs/e2fsprogs:fuse - Build fuse2fs, a FUSE file system client for ext2/ext3/ext4 file systems
sys-fs/eudev:blkid - enable blkid support
sys-fs/eudev:efi - enable EFI support
sys-fs/eudev:hwdb - read vendor/device string database and add it to udev database
sys-fs/eudev:kmod - enable module loading through libkmod
sys-fs/eudev:rule-generator - install legacy rule generator rules and support scripts - note that the functionality within was dropped from sys-fs/udev as it is not stable in all cases; use at your own risk
sys-fs/eudev:smack - enable SMACK security model
sys-fs/ext4magic:expert-mode - Builds ext4magic with expert mode. Highly useful in recovering data from a corrupted filesystem
sys-fs/ext4magic:file-attr - Enable the recovery of file attributes (append, immutable, nodump etc)
sys-fs/lessfs:filelog - Enable the ability to log to a file instead of syslog
sys-fs/lessfs:memtrace - Enable leefs to create a report regarding the memory allocation. This feature should be used for debugging purposes to avoid performance degradation
sys-fs/lessfs:snappy - Enable snappy compression using the app-arch/snappy library
sys-fs/lvm2:clvm - Allow users to build clustered lvm2
sys-fs/lvm2:cman - Cman support for clustered lvm
sys-fs/lvm2:corosync - Corosync support for clustered lvm
sys-fs/lvm2:device-mapper-only - Build only device-mapper and not the rest of LVM2 (UNSUPPORTED)
sys-fs/lvm2:lvm1 - Allow users to build lvm2 with lvm1 support
sys-fs/lvm2:lvm2create_initrd - Install lvm2create_initrd script and pull in sys-apps/makedev for the /sbin/MAKEDEV command
sys-fs/lvm2:openais - Openais support for clustered lvm
sys-fs/lvm2:sanlock - Enable lvmlockd with support for sanlock
sys-fs/lvm2:thin - Support for thin volumes
sys-fs/mtpfs:mad - Enable handling of MP3's metadata
sys-fs/multipath-tools:rbd - Enable Rados block device support via sys-cluster/ceph
sys-fs/ntfs3g:external-fuse - Use external FUSE library instead of internal one. Must be disabled for unprivileged mounting to work.
sys-fs/ntfs3g:ntfsdecrypt - Build and install the ntfsdecrypt application.
sys-fs/ntfs3g:ntfsprogs - Include internal version of ntfsprogs.
sys-fs/owfs:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
sys-fs/owfs:ftpd - Enable building the OWFS FTP server (owftpd)
sys-fs/owfs:fuse - Enable building the FUSE-based OWFS client (owfs)
sys-fs/owfs:httpd - Enable building the OWFS web server (owhttpd)
sys-fs/owfs:parport - Enable support for the DS1410E parallel port adapter
sys-fs/owfs:zeroconf - Enables support for zero-configuration networking via net-dns/avahi
sys-fs/quota:netlink - Compile daemon receiving quota messages via netlink
sys-fs/quota:rpc - Enable quota interaction via RPC
sys-fs/squashfs-tools:lz4 - Enable support for LZ4 compression using app-arch/lz4
sys-fs/squashfs-tools:xz - Enable support for XZ ("LZMA2") compression using app-arch/xz-utils
sys-fs/squashfs-tools:zstd - Enable support for ZSTD compression using app-arch/zstd
sys-fs/udev:kmod - Enable kernel module loading/unloading support using sys-apps/kmod
sys-fs/udisks:cryptsetup - Enable sys-fs/cryptsetup support
sys-fs/udisks:elogind - Use sys-auth/elogind for session tracking
sys-fs/udisks:gptfdisk - Pull in sys-apps/gptfdisk for sgdisk command as used by partitioning functionality
sys-fs/udisks:lvm - Add support for Logical Volume Management via sys-fs/lvm2.
sys-fs/udisks:remote-access - Control whether connections from other clients over LAN are allowed
sys-fs/udisks:systemd - Support sys-apps/systemd's logind
sys-fs/udisks:vdo - Enable Virtual Data Optimizer support.
sys-fs/zfs:kernel-builtin - Disable dependency on sys-fs/zfs-kmod under the assumption that ZFS is part of the kernel source tree
sys-fs/zfs:rootfs - Enable dependencies required for booting off a pool containing a rootfs
sys-fs/zfs:test-suite - Install regression test suite
sys-fs/zfs-kmod:rootfs - Install zfs-shutdown script to support exporting a pool containing rootfs
sys-kernel/dracut:debug - Module installing additional tools like strace, file editor, ssh and more
sys-kernel/genkernel:cryptsetup - Enable support for Luks disk encryption using sys-fs/cryptsetup
sys-kernel/genkernel:firmware - Prefer system firmware sys-kernel/linux-firmware over local copy.
sys-kernel/genkernel-next:cryptsetup - Enable support for Luks disk enrcyption using sys-fs/cryptsetup
sys-kernel/genkernel-next:dmraid - Enable support for DMRAID (include dmraid dependency)
sys-kernel/genkernel-next:gpg - Enable support for GPG (include gnupg dependency)
sys-kernel/genkernel-next:iscsi - Enable support for open-iscsi (include open-iscsi dependency)
sys-kernel/genkernel-next:mdadm - Enable support for mdadm (include mdadm dependency)
sys-kernel/genkernel-next:plymouth - Enable support for Plymouth (include Plymouth dependency)
sys-kernel/gentoo-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-kernel/linux-firmware:savedconfig - Allows individual selection of firmware files
sys-libs/binutils-libs:64-bit-bfd - Support 64-bit targets even on 32-bit hosts (is ignored on 64-bit hosts)
sys-libs/binutils-libs:multitarget - Enable all possible targets in libbfd
sys-libs/compiler-rt:clang - Force building using installed clang (rather than the default CC/CXX).
sys-libs/compiler-rt-sanitizers:clang - Force building using installed clang (rather than the default CC/CXX).
sys-libs/db:rpc - Enable rpc client/server
sys-libs/freeipmi:nagios - Install a nagios plugin to check sensors' status.
sys-libs/gdbm:berkdb - enable compatibility layer for UNIX-like dbm and ndbm interfaces
sys-libs/gdbm:exporter - enable gdbmexport binary for exporting data from gdbm-1.8 databases into gdbm-1.9
sys-libs/glibc:cet - Enable Intel Control-flow Enforcement Technology (needs binutils 2.29 and gcc 8)
sys-libs/glibc:compile-locales - build *all* locales in src_install; this is generally meant for stage building only as it ignores /etc/locale.gen file and can be pretty slow
sys-libs/glibc:debug - When USE=hardened, allow fortify/stack violations to dump core (SIGABRT) and not kill self (SIGKILL)
sys-libs/glibc:gd - build memusage and memusagestat tools
sys-libs/glibc:multiarch - enable optimizations for multiple CPU architectures (detected at runtime)
sys-libs/glibc:nscd - Build, and enable support for, the Name Service Cache Daemon
sys-libs/glibc:rpc - Enable obsolete RPC/NIS layers
sys-libs/glibc:suid - Make internal pt_chown helper setuid -- not needed if using Linux and have /dev/pts mounted with gid=5
sys-libs/glibc:systemtap - enable systemtap static probe points
sys-libs/gwenhywfar:designer - Build plugins for dev-qt/designer
sys-libs/gwenhywfar:fox - Use x11-libs/fox graphical toolkit
sys-libs/gwenhywfar:qml - Enable support for plugins using QML
sys-libs/gwenhywfar:sensors - Enable support for dev-qt/qtsensors module
sys-libs/gwenhywfar:serialport - Enable support for dev-qt/qtserialport module
sys-libs/gwenhywfar:webkit - Enable support for dev-qt/qtwebkit
sys-libs/ldb:doc - Builds documentation
sys-libs/ldb:ldap - Enable LDAP support
sys-libs/ldb:lmdb - Enable LMDB backend
sys-libs/ldb:python - Enable Python support
sys-libs/libblockdev:bcache - Enable block device cache support.
sys-libs/libblockdev:cryptsetup - Enable sys-fs/cryptsetup support
sys-libs/libblockdev:dmraid - Support for dmraid devices, also known as ATA-RAID, or Fake RAID.
sys-libs/libblockdev:escrow - Support for building crypto plugin with escrow device support
sys-libs/libblockdev:kbd - Enable kernel block device support.
sys-libs/libblockdev:lvm - Enable support for Logical Volume Management via sys-fs/lvm2.
sys-libs/libblockdev:vdo - Enable Virtual Data Optimizer support.
sys-libs/libcxx:libcxxabi - Build on top of sys-libs/libcxxabi instead of gcc's libsupc++ (avoids depending on gcc).
sys-libs/libcxx:libcxxrt - Build on top of sys-libs/libcxxrt instead of gcc's libsupc++ (avoids depending on gcc).
sys-libs/libcxx:libunwind - Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependence on gcc.
sys-libs/libcxxabi:libunwind - Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependency on gcc
sys-libs/libcxxrt:libunwind - Use libunwind instead of libgcc_s for unwinding. This should allow avoiding relying on sys-devel/gcc but for now clang is setup to use libgcc_s.
sys-libs/libomp:cuda - Build CUDA offloading plugin (only with USE=offload)
sys-libs/libomp:hwloc - Enable CPU affinity support via hwloc
sys-libs/libomp:offload - Support offloading OpenMP using libomptarget
sys-libs/libomp:ompt - Enable OpenMP Tools Interface support
sys-libs/libselinux:pcre2 - Use dev-libs/libpcre2 for fcontext regexes
sys-libs/libunwind:debug-frame - Adds support for DWARF .debug_frame section: Use the information from this section if available
sys-libs/libunwind:libatomic - Use libatomic instead of builtin atomic operations
sys-libs/ncurses:ada - Add bindings for the ADA programming language
sys-libs/ncurses:tinfo - Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode
sys-libs/ncurses:trace - Enable test trace() support in ncurses calls
sys-libs/pam:berkdb - Build the pam_userdb module, that allows to authenticate users against a Berkeley DB file. Please note that enabling this USE flag will create a PAM module that links to the Berkeley DB (as provided by sys-libs/db) installed in /usr/lib and will thus not work for boot-critical services authentication.
sys-libs/pam:cracklib - Build the pam_cracklib module, that allows to verify the chosen passwords' strength through the use of sys-libs/cracklib. Please note that simply enabling the USE flag on this package will not make use of pam_cracklib by default, you should also enable it in sys-auth/pambase as well as update your configuration files.
sys-libs/readline:utils - Install rlfe (ReadLine Front-End) helper tool -- a wrapper program for making any stdin use readline
sys-libs/talloc:compat - Enable extra compatibility stuff
sys-libs/timezone-data:leaps_timezone - Install the set of "right" timezones; these timezones include leap seconds when counting seconds since the epoch (while POSIX does not) as they are based on the TAI (International Atomic Time) clock
sys-libs/uclibc-ng:rpc - Enable sun nis/rpc support (you should use libtirpc though)
sys-libs/uclibc-ng:symlink-compat - Explicitly add sym links for libdl.so.0, libm.so.0, and friends for backward compatibility with sys-libs/uclibc-ng-1.0.17 and earlier
sys-libs/zlib:minizip - include the minizip library for quick and dirty zip extraction
sys-power/apcupsd:modbus - Enable MODBUS support over USB
sys-power/cpupower:cpufreq_bench - Build and install the cpufreq_bench binary
sys-power/nut:gui - Install NUT-Monitor python gui
sys-power/nut:ipmi - Support IPMI-based UPSes.
sys-power/nut:ups_drivers_al175 - Driver for Eltek UPS models with AL175 alarm module
sys-power/nut:ups_drivers_apcsmart - Driver for American Power Conversion Smart Protocol UPS equipment
sys-power/nut:ups_drivers_apcsmart-old - Driver for American Power Conversion Smart Protocol UPS equipment
sys-power/nut:ups_drivers_apcupsd-ups - Driver for apcupsd client access
sys-power/nut:ups_drivers_bcmxcp - Driver for UPSes supporting the serial BCM/XCP protocol
sys-power/nut:ups_drivers_bcmxcp_usb - Experimental driver for UPSes supporting the BCM/XCP protocol over USB
sys-power/nut:ups_drivers_belkin - Driver for Belkin serial UPS equipment
sys-power/nut:ups_drivers_belkinunv - Driver for Belkin "Universal UPS" and compatible
sys-power/nut:ups_drivers_bestfcom - Driver for Best Power Fortress/Ferrups
sys-power/nut:ups_drivers_bestfortress - Driver for old Best Fortress UPS equipment
sys-power/nut:ups_drivers_bestuferrups - Driver for Best Power Micro-Ferrups
sys-power/nut:ups_drivers_bestups - Driver for Best Power / SOLA (Phoenixtec protocol) UPS equipment
sys-power/nut:ups_drivers_blazer_ser - Driver for Megatec/Q1 protocol serial based UPS equipment
sys-power/nut:ups_drivers_blazer_usb - Driver for Megatec/Q1 protocol USB based UPS equipment
sys-power/nut:ups_drivers_clone - Fake driver to clone outlets for device grouping
sys-power/nut:ups_drivers_clone-outlet - Fake driver to clone outlets for device grouping
sys-power/nut:ups_drivers_dummy-ups - Driver for multi-purpose UPS emulation
sys-power/nut:ups_drivers_etapro - Driver for ETA UPS equipment
sys-power/nut:ups_drivers_everups - Driver for Ever UPS models
sys-power/nut:ups_drivers_gamatronic - Driver for Gamatronic UPS equipment
sys-power/nut:ups_drivers_genericups - Driver for contact-closure UPS equipment
sys-power/nut:ups_drivers_isbmex - Driver for ISBMEX UPS equipment
sys-power/nut:ups_drivers_ivtscd - driver for the IVT Solar Controller Device
sys-power/nut:ups_drivers_liebert - Driver for Liebert contact-closure UPS equipment
sys-power/nut:ups_drivers_liebert-esp2 - Driver for Liebert UPS, using the ESP-II serial protocol
sys-power/nut:ups_drivers_masterguard - Driver for Masterguard UPS equipment
sys-power/nut:ups_drivers_metasys - Driver for Meta System UPS equipment
sys-power/nut:ups_drivers_mge-shut - Driver for SHUT Protocol UPS equipment
sys-power/nut:ups_drivers_mge-utalk - Driver for MGE UPS SYSTEMS UTalk protocol equipment
sys-power/nut:ups_drivers_microdowell - Driver for Microdowell Enterprise UPS series
sys-power/nut:ups_drivers_netxml-ups - Driver for Eaton / MGE Network Management Card / Proxy (XML/HTTP Protocol) equipment
sys-power/nut:ups_drivers_nut-ipmipsu - Driver for IPMI Power Supply Units (PSU)
sys-power/nut:ups_drivers_nutdrv_qx - Driver for Q* protocol serial and USB based UPS equipment
sys-power/nut:ups_drivers_oldmge-shut - Driver for SHUT Protocol UPS equipment (older implementation)
sys-power/nut:ups_drivers_oneac - Driver for Oneac UPS equipment
sys-power/nut:ups_drivers_optiups - Driver for Opti-UPS (Viewsonic) UPS and Zinto D (ONLINE-USV) equipment
sys-power/nut:ups_drivers_powercom - UPS driver for serial Powercom/Trust/Advice UPS equipment
sys-power/nut:ups_drivers_powerpanel - Driver for PowerPanel Plus compatible UPS equipment
sys-power/nut:ups_drivers_rhino - Driver for Brazilian Microsol RHINO UPS equipment
sys-power/nut:ups_drivers_richcomm_usb - Driver UPS equipment using Richcomm dry-contact to USB solution
sys-power/nut:ups_drivers_riello_ser - Driver for Riello UPS Protocol UPS equipment
sys-power/nut:ups_drivers_riello_usb - Driver for Riello UPS Protocol UPS equipment via USB
sys-power/nut:ups_drivers_safenet - Driver for SafeNet compatible UPS equipment
sys-power/nut:ups_drivers_snmp-ups - Multi-MIB Driver for SNMP UPS equipment
sys-power/nut:ups_drivers_solis - Driver for Brazilian Microsol SOLIS UPS equipment
sys-power/nut:ups_drivers_tripplite - Driver for Tripp-Lite SmartPro UPS equipment
sys-power/nut:ups_drivers_tripplite_usb - Driver for older Tripp Lite USB UPSes (not PDC HID)
sys-power/nut:ups_drivers_tripplitesu - Driver for Tripp-Lite SmartOnline (SU) UPS equipment
sys-power/nut:ups_drivers_upscode2 - Driver for UPScode II compatible UPS equipment
sys-power/nut:ups_drivers_usbhid-ups - Driver for USB/HID UPS equipment
sys-power/nut:ups_drivers_victronups - Driver for IMV/Victron UPS unit Match, Match Lite, NetUps
sys-power/nvclock:gtk - Install the GTK+ based graphical interface
sys-power/nvclock:nvcontrol - Add NVCONTROL support for OpenGL options
sys-power/pm-utils:ntp - Install support for net-misc/ntp
sys-power/powermgmt-base:pm-utils - Adds support for on_ac_power through sys-power/pm-utils
sys-power/suspend:crypt - Allows suspend and resume from encrypted disk
sys-process/audit:gssapi - Enable GSSAPI support
sys-process/criu:setproctitle - Make process titles of service workers to be more verbose
sys-process/cronie:anacron - Install the periodic anacron command scheduler.
sys-process/cronie:inotify - Enable inotify filesystem monitoring support.
sys-process/fcron:debug - Enable debug code and output. Since version 3.0.5 this will no longer force foreground execution, and fcron will be able to run as a service properly.
sys-process/fcron:mta - Enable mta support for sending emails from fcron
sys-process/fcron:pam - Enable PAM support for fcron. This means that fcron will pass through the "fcron" stack before executing the jobs, and fcrontab will use the "fcrontab" stack to authenticate the user before editing its crontab file.
sys-process/fcron:system-crontab - Set up fcron to respect /etc/crontab and /etc/cron.d. If this flag is disabled, /etc/cron.d and /etc/crontab will be ignored, but /etc/cron.{hourly,daily,weekly,monthly} will still be respected.
sys-process/htop:openvz - Enable openvz support
sys-process/htop:vserver - Enable vserver support
sys-process/lsof:rpc - support looking up RPC service info
sys-process/procps:elogind - Use sys-auth/elogind for session tracking.
sys-process/procps:kill - Build the kill program
sys-process/procps:modern-top - Enables new startup defaults of top. Keeps old defaults if disabled
sys-process/procps:ncurses - Build programs that use ncurses: top, slabtop, watch
sys-process/systemd-cron:cron-boot - Include support for the boot timer.
sys-process/systemd-cron:etc-crontab-systemd - Use dedicated /etc/crontab-systemd instead of parsing /etc/crontab
sys-process/systemd-cron:minutely - Support /etc/cron.minutely
sys-process/systemd-cron:setgid - Compile setgid C helper for crontab. Needs GCC or Clang.
sys-process/systemd-cron:yearly - Support /etc/cron.yearly
sys-process/tini:args - Enable argument parsing.
virtual/ffmpeg:opus - Use the external opus library for encoding and decoding.
virtual/linux-sources:firmware - Install linux kernel firmware
virtual/mpi:romio - Enable romio, a high-performance portable MPI-IO
virtual/mysql:embedded - Build embedded server (libmysqld)
virtual/mysql:server - Build server (mysqld)
virtual/podofo-build:boost - Add support for boost
virtual/podofo-build:tools - Build and install commandline tools.
virtual/ssh:minimal - Prefer net-misc/dropbear over net-misc/openssh
virtual/wine:d3d9 - Enable Ixit's Gallium Nine Patchset
virtual/wine:staging - Enable Wine-Staging's Patchset
www-apache/mod_extract_forwarded:mod_proxy - Enable support for Apache's internal proxy
www-apache/mod_perl:ithreads - Build for use with thread-capable perl, needs same setting as in dev-lang/perl
www-apache/mod_security:fuzzyhash - Support fuzzy hash computations (to detect malware, for example) using the app-crypt/ssdeep package.
www-apache/mod_security:geoip - Pull in dev-libs/geoip for use by the SecGeoLookupDb directive.
www-apache/mod_security:jit - Add support for the PCRE Just-in-Time optimisation, as enabled by dev-libs/libpcre with jit USE flag enabled. Might not be available on hardened systems.
www-apache/mod_security:json - Suppose JSON in the request body parser through dev-libs/yajl.
www-apache/mod_security:mlogc - Build and install the ModSecurity Audit Log Collector (mlogc).
www-apps/ampache:transcode - Install optional dependencies for transcoding support
www-apps/bugzilla:extras - Optional Perl modules
www-apps/bugzilla:modperl - Enable www-apache/mod_perl support
www-apps/cgit:highlight - Enable source code highlighting
www-apps/cgit:jit - If the lua flag is enabled, jit uses LuaJIT instead of vanilla Lua
www-apps/cgit:lua - Enable support for Lua scripting
www-apps/icingaweb2:nginx - Adds support for nginx
www-apps/ikiwiki:extras - Installs additional modules used by ikiwiki plugins
www-apps/nikola:assets - Support web asset management through dev-python/assets
www-apps/nikola:charts - Support chart generation through dev-python/pygal
www-apps/nikola:ghpages - Add support for direct uploading to github pages thru dev-python/ghp-import
www-apps/nikola:hyphenation - Add hyphenation support through dev-python/pyphen
www-apps/nikola:ipython - Add IPython notebook compilation and LESS support
www-apps/nikola:jinja - Add support for dev-python/jinja as alternative templating engine to Mako
www-apps/nikola:watchdog - Use dev-python/watchdog to monitor file system events
www-apps/nikola:webmedia - Use dev-python/micawber to extract metadata from web media links
www-apps/nikola:websocket - Add websocket support thru dev-python/ws4py
www-apps/phpsysinfo:apcupsd - Install sys-power/apcupsd to display those stats.
www-apps/phpsysinfo:dmraid - Install sys-fs/dmraid to display those stats.
www-apps/phpsysinfo:freeipmi - Install sys-libs/freeipmi to display those stats.
www-apps/phpsysinfo:hddtemp - Install app-admin/hddtemp to display those stats.
www-apps/phpsysinfo:ipmitool - Install sys-apps/ipmitool to display those stats.
www-apps/phpsysinfo:ipmiutil - Install sys-apps/ipmiutil to display those stats.
www-apps/phpsysinfo:iptables - Install net-firewall/iptables to display those stats.
www-apps/phpsysinfo:lm_sensors - Install sys-apps/lm_sensors to display those stats.
www-apps/phpsysinfo:mdadm - Install sys-fs/mdadm to display those stats.
www-apps/phpsysinfo:megactl - Install sys-block/megactl to display those stats.
www-apps/phpsysinfo:nut - Install sys-power/nut to display those stats.
www-apps/phpsysinfo:quota - Install sys-fs/quota to display those stats.
www-apps/phpsysinfo:smart - Install sys-apps/smartmontools to display those stats.
www-apps/phpsysinfo:snmp - Install net-analyzer/net-snmp to display those stats.
www-apps/phpsysinfo:uptime - Install app-misc/uptimed to display those stats.
www-apps/postfixadmin:vacation - Install vacation.pl script and dependencies
www-apps/sitebar:plugins - Install optional plugins
www-apps/trac:highlight - Enable syntax highlighting
www-apps/trac:i18n - Enable support for i18n with dev-python/Babel
www-apps/trac:restructuredtext - Enable support for reStructuredText for wiki formatting
www-apps/venus:django - Support for django template style to config files
www-apps/venus:genshi - Support for genshi style to config files
www-apps/venus:redland - Enable support for Redland RDF
www-apps/viewvc:cvsgraph - Add dev-vcs/cvsgraph support to show graphical views of revisions and branches
www-apps/viewvc:mod_wsgi - Add www-apache/mod_wsgi support
www-apps/viewvc:pygments - Add dev-python/pygments support for syntax highlighting
www-apps/websvn:enscript - Add enscript support to colorize code stored in the repository
www-client/chromium:component-build - Split build into more shared libraries to speed up linking. Mostly intended for debugging and development, NOT RECOMMENDED for general use.
www-client/chromium:hangouts - Enable support for Google Hangouts features such as screen sharing
www-client/chromium:jumbo-build - Combine source files to speed up build process.
www-client/chromium:pic - Disable optimized assembly code that is not PIC friendly
www-client/chromium:proprietary-codecs - Enable proprietary codecs like H.264, MP3
www-client/chromium:suid - Build the SUID sandbox, which is only needed on CONFIG_USER_NS=n kernels
www-client/chromium:system-ffmpeg - Use system ffmpeg instead of the bundled one
www-client/chromium:system-icu - Use system icu instead of the bundled one
www-client/chromium:system-libvpx - Use system libvpx instead of the bundled one
www-client/chromium:tcmalloc - Use bundled tcmalloc instead of system malloc
www-client/chromium:widevine - Unsupported closed-source DRM capability (required by Netflix VOD)
www-client/elinks:bittorrent - Enable support for the BitTorrent protocol
www-client/elinks:brotli - Enable support for brotli compression
www-client/elinks:finger - Enable support for the finger protocol
www-client/elinks:gc - Enable garbage collection support via dev-libs/boehm-gc
www-client/elinks:gopher - Enable support for the gopher protocol
www-client/elinks:mouse - Make elinks to grab all mouse events
www-client/elinks:tre - Enable support for regex searches via dev-libs/tre
www-client/elinks:xml - Enable support for bookmarks via dev-libs/expat
www-client/falkon:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
www-client/firefox:bindist - Disable official Firefox branding (icons, name) which are not binary-redistributable according to upstream.
www-client/firefox:clang - Use Clang compiler instead of GCC
www-client/firefox:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
www-client/firefox:eme-free - Disable EME (DRM plugin) cabability at build time
www-client/firefox:geckodriver - Enable WebDriver support
www-client/firefox:gmp-autoupdate - Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles
www-client/firefox:gtk2 - Use the cairo-gtk2 rendering engine
www-client/firefox:hwaccel - Force-enable hardware-accelerated rendering (Mozilla bug 594876)
www-client/firefox:lto - Enable Link Time Optimization (LTO). Requires Gold linker when using GCC or LDD linker when using Clang
www-client/firefox:pgo - Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.
www-client/firefox:rust - Enable support for using rust compiler (experimental)
www-client/firefox:screenshot - Allow to disable screenshot extension in global profile
www-client/firefox:system-cairo - Use the system-wide x11-libs/cairo instead of bundled.
www-client/firefox:system-harfbuzz - Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled.
www-client/firefox:system-icu - Use the system-wide dev-libs/icu instead of bundled.
www-client/firefox:system-jpeg - Use the system-wide media-libs/libjpeg-turbo instead of bundled.
www-client/firefox:system-libevent - Use the system-wide dev-libs/libevent instead of bundled.
www-client/firefox:system-libvpx - Use the system-wide media-libs/libvpx instead of bundled.
www-client/firefox:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
www-client/links:libevent - Enable dev-libs/libevent support
www-client/lynx:gnutls - Use gnutls library for HTTPS support (openssl is the default library for HTTPS support).
www-client/lynx:ssl - Enable HTTPS support.
www-client/qupzilla:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
www-client/qupzilla:nonblockdialogs - Enable fancy non-blocking JavaScript dialogs shown inside the page, not blocking the application window. When closing browser windows with open dialogs, this can crash the application.
www-client/seamonkey:calendar - Build Mozilla's calendar
www-client/seamonkey:chatzilla - Build Mozilla's IRC client (default on)
www-client/seamonkey:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
www-client/seamonkey:force-gtk3 - Use the cairo-gtk3 rendering engine
www-client/seamonkey:gmp-autoupdate - Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles
www-client/seamonkey:ipc - Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes
www-client/seamonkey:roaming - Build roaming extension support (default on)
www-client/seamonkey:system-cairo - Use the system-wide x11-libs/cairo instead of bundled
www-client/seamonkey:system-harfbuzz - Use the system-wide media-libs/harfbuzz instead of bundled
www-client/seamonkey:system-icu - Use the sytem-wide dev-libs/icu instead of bundled
www-client/seamonkey:system-jpeg - Use the system-wide media-libs/libjpeg-turbo instead of bundled
www-client/seamonkey:system-libevent - Use the system-wide dev-libs/libevent instead of bundled
www-client/seamonkey:system-libvpx - Use the system-wide media-libs/libvpx instead of bundled
www-client/seamonkey:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
www-client/surf:savedconfig - Without a saved config.h, this package depends on net-misc/curl and x11-terms/st for a default download mechanism
www-client/uget:aria2 - Enable support for net-misc/aria2 through xmlrpc. You'll find the plugin in the app's settings.
www-client/uget:control-socket - Enable JSON-RPC over unix domain socket
www-client/uget:openssl - Use dev-libs/openssl instead of net-libs/gnutls
www-client/uget:rss - Enable uGet feed messages
www-client/w3m:gdk-pixbuf - Enable support for x11-libs/gdk-pixbuf
www-client/w3m:lynxkeymap - If you prefer Lynx-like key binding
www-misc/monitorix:apcupsd - Make use of a daemon that controls APC UPSes with sys-power/apcupsd.
www-misc/monitorix:httpd - Enables the CGI webserver with any package that satisfies virtual/httpd-cgi.
www-misc/monitorix:postfix - Analyze postfix logs with net-mail/pflogsumm.
www-misc/shellinabox:pam - Enable PAM support.
www-misc/vdradmin-am:vdr - Support for media-video/vdr. Disable this if the VDR you want to control runs at a remote machine.
www-plugins/freshplayerplugin:gles2 - Use system GLESv2 libraries instead of ANGLE for shader translation
www-plugins/freshplayerplugin:gtk3 - Build with GTK+ 3 instead of GTK+ 2
www-plugins/freshplayerplugin:v4l - Use libv4l2 for colorspace conversion
www-servers/apache:apache2_modules_access_compat - Group authorizations based on host (name or IP address). Available as a compatibility module with previous versions.
www-servers/apache:apache2_modules_authn_core - Provides core authentication capabilities common to all authentication providers (functionality provided by authn_alias in previous versions).
www-servers/apache:apache2_modules_authz_core - Provides core authorization capabilities to various authorization/authorization modules, such as authn_file and authz_user.
www-servers/apache:apache2_modules_authz_dbd - Provides authorization capabilities via SQL database so that authenticated users can be allowed or denied access to portions of the web site by group membership.
www-servers/apache:apache2_modules_brotli - Enable brotli compression support
www-servers/apache:apache2_modules_cache_disk - Disk based storage module for the HTTP caching filter (similar to mem_cache in previous versions).
www-servers/apache:apache2_modules_cache_socache - Shared object cache (socache) based storage module for the HTTP caching filter.
www-servers/apache:apache2_modules_http2 - Enable http2/alpn module
www-servers/apache:apache2_modules_lbmethod_bybusyness - Pending request counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_byrequests - Request counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_bytraffic - Weighted traffic counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_heartbeat - Heartbeat traffic counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_macro - Macros for the Apache config file.
www-servers/apache:apache2_modules_md - Managing domains across virtual hosts, certificate provisioning via the ACME protocol.
www-servers/apache:apache2_modules_proxy_fcgi - FCGI support module for mod_proxy.
www-servers/apache:apache2_modules_proxy_html - Module to rewrite links in html pages behind a reverse proxy
www-servers/apache:apache2_modules_proxy_wstunnel - Provides support for the tunnelling of web socket connections to a backend websockets server.
www-servers/apache:apache2_modules_ratelimit - Ratelimit module for transfer rate management
www-servers/apache:apache2_modules_remoteip - Remotip module for logging
www-servers/apache:apache2_modules_slotmem_shm - Slot-based shared memory provider.
www-servers/apache:apache2_modules_socache_shmcb - A shared object cache provider using a high-performance cyclic buffer inside a shared memory segment.
www-servers/apache:apache2_modules_unixd - Basic (required) security for Unix-family platforms.
www-servers/apache:apache2_modules_watchdog - Provides infrastructure for other modules to periodically run tasks
www-servers/apache:apache2_modules_xml2enc - Enable xml2 encoding module
www-servers/apache:static - Link in apache2 modules statically rather then plugins
www-servers/apache:suexec - Install suexec with apache
www-servers/apache:suexec-caps - Install suexec with capabilities instead of SUID
www-servers/apache:suexec-syslog - Log suexec to syslog instead of to a separate file
www-servers/lighttpd:libev - Enable fdevent handler
www-servers/lighttpd:mmap - Use mmap with files owned by lighttpd. This is a dangerous option as it may allow local users to trigger SIGBUS crashes.
www-servers/lighttpd:rrdtool - Enable rrdtool support via mod_rrdtool
www-servers/lighttpd:webdav - Enable webdav properties
www-servers/monkeyd:debug - Enable lots of debugging info
www-servers/monkeyd:static-plugins - Build statically linked plugins
www-servers/nginx:aio - Enables file AIO support
www-servers/nginx:http - Enable HTTP core support
www-servers/nginx:http-cache - Enable HTTP cache support
www-servers/nginx:http2 - Enable HTTP2 module support
www-servers/nginx:libatomic - Use libatomic instead of builtin atomic operations
www-servers/nginx:luajit - Use dev-lang/luajit instead of dev-lang/lua for lua support when building the lua http module.
www-servers/nginx:pcre-jit - Enable JIT for pcre
www-servers/nginx:rtmp - NGINX-based Media Streaming Server
www-servers/nginx:ssl - Enable HTTPS module for http. Enable SSL/TLS support for POP3/IMAP/SMTP for mail.
www-servers/tomcat:extra-webapps - Build also the docs and examples webapp
www-servers/tomcat:websockets - Builds websockets api and implementation (requires java 7)
www-servers/uwsgi:embedded - Embed plugins instead of building them as real plugins. When disabling this USE flag make sure you specify all used plugins in your uWSGI configuration. Note: Language plugins will always be built as real plugins.
www-servers/uwsgi:go - Build the gccgo plugin to run Go applications.
www-servers/uwsgi:json - Support json as a configuration file format.
www-servers/uwsgi:pypy - Build the pypy plugin to run your code using virtual/pypy.
www-servers/uwsgi:python_asyncio - Use the EXPERIMENTAL asyncio (tulip) for python3.4 async request dispatching and as LoopEngine (see http://uwsgi-docs.readthedocs.org/en/latest/asyncio.html).
www-servers/uwsgi:python_gevent - Use dev-python/gevent for async request dispatching and as LoopEngine (see http://projects.unbit.it/uwsgi/wiki/Gevent).
www-servers/uwsgi:routing - Enable routing support
www-servers/uwsgi:yajl - Use dev-libs/yajl instead of dev-libs/jansson for parsing JSON configuration files (if USe=json is set)
www-servers/uwsgi:yaml - Support yaml as a configuration file format.
www-servers/uwsgi:zeromq - Enable logging and deployment via ZeroMQ.
x11-apps/mesa-progs:egl - Build EGL utilities
x11-apps/mesa-progs:gles2 - Build OpenGL ES 2 utilities
x11-apps/xdm:consolekit - Enable native sys-auth/consolekit support
x11-apps/xdm:xdm-auth - Enable XDM-AUTHENTICATION-1 support
x11-apps/xdpyinfo:dmx - Builds support for Distributed Multiheaded X x11-base/xorg-server
x11-apps/xinit:minimal - Control dependencies on legacy apps (xterm, twm, ...). Safe to enable if you use a modern desktop environment.
x11-apps/xsm:rsh - This allows the use of rsh (remote shell) and rcp (remote copy).
x11-base/xorg-server:dmx - Build the Distributed Multiheaded X server
x11-base/xorg-server:glamor - Enable Glamor OpenGL 2D acceleration
x11-base/xorg-server:kdrive - Build the kdrive X servers
x11-base/xorg-server:tslib - Build with tslib support for touchscreen devices
x11-base/xorg-server:unwind - Enable libunwind usage for backtraces
x11-base/xorg-server:xcsecurity - Build Security extension
x11-base/xorg-server:xephyr - Build the Xephyr server
x11-base/xorg-server:xnest - Build the Xnest server
x11-base/xorg-server:xorg - Build the Xorg X server (HIGHLY RECOMMENDED)
x11-base/xorg-server:xvfb - Build the Xvfb server
x11-base/xorg-x11:fonts - Install fonts from X.Org
x11-drivers/nvidia-drivers:X - Install the X.org driver, OpenGL libraries, XvMC libraries, and VDPAU libraries
x11-drivers/nvidia-drivers:compat - Install non-GLVND libGL for backwards compatibility
x11-drivers/nvidia-drivers:driver - Install the kernel driver module
x11-drivers/nvidia-drivers:gtk3 - Install nvidia-settings with support for GTK+ 3
x11-drivers/nvidia-drivers:kms - Enable support for kernel mode setting (KMS)
x11-drivers/nvidia-drivers:pax_kernel - PaX patches from the PaX project
x11-drivers/nvidia-drivers:tools - Install additional tools such as nvidia-settings
x11-drivers/nvidia-drivers:uvm - Install the Unified Memory kernel module (nvidia-uvm) for sharing memory between CPU and GPU in CUDA programs
x11-drivers/xf86-video-ati:glamor - Enable Glamor OpenGL 2D acceleration
x11-drivers/xf86-video-intel:dri3 - Use DRI3 by default
x11-drivers/xf86-video-intel:sna - Enable SandyBridge's New Acceleration (useful on all chipsets, not just SandyBridge)
x11-drivers/xf86-video-intel:tools - Build the intel-virtual-output tool
x11-drivers/xf86-video-intel:uxa - Enable UMA Acceleration Architecture
x11-drivers/xf86-video-intel:xvmc - Enables X-Video Motion Compensation support
x11-drivers/xf86-video-openchrome:viaregtool - Install registers dumper tool
x11-drivers/xf86-video-qxl:xspice - Build the xspice driver
x11-libs/agg:gpc - Enable gpc polygon clipper library
x11-libs/cairo:gles2 - Build the OpenGL ES 2 backend
x11-libs/cairo:glib - Compile with GLib Object System support
x11-libs/cairo:opengl - Build the OpenGL backend
x11-libs/cairo:utils - Build support for Cairo script and trace utilities
x11-libs/cairo:valgrind - Built-in support to mark memory regions
x11-libs/fltk:games - Builds and installs some extra games
x11-libs/gdk-pixbuf:X - Build and install the legacy gdk_pixbuf_xlib-2.0 library
x11-libs/gtk+:broadway - Enable the GDK Broadway backend.
x11-libs/gtk+:cloudprint - Enable printing via Google Cloud Print.
x11-libs/gtk+:colord - Use x11-misc/colord for color management in printing
x11-libs/gtkdatabox:glade - Build with libglade and glade-3 supports, which includes a glade's module for GtkDataBox widget
x11-libs/gtkmathview:mathml - Install additional fonts for proper mathml support.
x11-libs/gtkmathview:t1lib - Enable media-libs/t1lib support
x11-libs/gtksourceview:glade - Install a glade catalog file
x11-libs/libSM:uuid - Use UUID for session identification instead of IP address and system time.
x11-libs/libXaw:deprecated - Install deprecated Xaw6 library.
x11-libs/libXfont2:bzip2 - Support bzip2 compressed PCF fonts.
x11-libs/libXfont2:truetype - Use media-libs/freetype for font rasterization.
x11-libs/libaosd:pango - Enable the textual helpers (requires pangocairo).
x11-libs/libaosd:tools - Install the aosd_cat tool (requires glib-2.0).
x11-libs/libdlo:test-program - Build the program for testing Displaylink devices.
x11-libs/libdrm:libkms - Enable building of libkms, a library for applications to interface with KMS
x11-libs/libdrm:valgrind - Compile in valgrind memory hints
x11-libs/libfm:automount - Use gnome-base/gvfs for automounting
x11-libs/libfm:udisks - Use libfm's udisks-based volume monitor implementation instead of using the one from gvfs
x11-libs/libfm:vala - Support custom actions in menus
x11-libs/libva:drm - Enables VA/DRM API support.
x11-libs/libva:egl - Enables EGL support.
x11-libs/libva:utils - Install VA-API utility programs.
x11-libs/libva-intel-driver:drm - Enables VA/DRM API support.
x11-libs/libwnck:tools - Install wnckprop-3 and wnck-urgency-monitor-3 command-line tools
x11-libs/libxcb:xkb - Enable the XCB keyboard extension
x11-libs/motif:motif22-compatibility - Compatibility with Open Motif 2.2
x11-libs/pango:X - Build and install the legacy pangoxft library
x11-libs/pixman:loongson2f - Enable Loongson2f MMI optimizations.
x11-libs/qscintilla:designer - Build plugin for Qt Designer
x11-libs/qwt:designer - Installs dev-qt/designer plugin.
x11-libs/qwt:mathml - Use the MathML renderer of the Qt solutions package.
x11-libs/vte:glade - Provide integration with dev-util/glade.
x11-libs/wxGTK:gstreamer - Enable the wxMediaCtrl class for playing audio and video through gstreamer.
x11-libs/wxGTK:sdl - Use Simple Directmedia Layer (media-libs/libsdl) for audio.
x11-misc/alock:doc - Build and install manpage with app-text/asciidoc.
x11-misc/bumblebee:bbswitch - Add dependency on sys-power/bbswitch for PM feature
x11-misc/colord:argyllcms - Enable ArgyllCMS sensor
x11-misc/colord:extra-print-profiles - Generate extra print profiles. Warning: significant build time and memory requirements.
x11-misc/colord:gusb - Enable dev-libs/libgusb support, needed for colorimeter drivers
x11-misc/compton:drm - Enable VSync with DRM_IOCTL_WAIT_VBLANK
x11-misc/compton:opengl - Enable VSync with SGI_swap_control OpenGL extension
x11-misc/dunst:dunstify - Experimental replacement for notify-send.
x11-misc/fbpager:xrender - Enable transparency support via x11-libs/libXrender
x11-misc/gtkdialog:glade - Enable support for gnome-base/libglade
x11-misc/gtkdialog:gtk3 - Build with GTK+3 instead of GTK+2
x11-misc/gtkdialog:vte - Enable support for x11-libs/vte
x11-misc/i3status:filecaps - Linux capabilities library is required for i3status to be able to read net bandwith
x11-misc/ktsuss:sudo - Use the sudo backend instead the su one
x11-misc/lightdm:gtk - Pull in the gtk+ greeter
x11-misc/mugshot:gnome - Add support for gnome-base/gnome-control-center
x11-misc/mugshot:libreoffice - Add support for app-office/libreoffice and app-office/libreoffice-bin
x11-misc/mugshot:webcam - Add support for setting a profile photo in media-video/cheese
x11-misc/openbox-menu:icons - Enable support for icons in menus
x11-misc/openbox-menu:svg - Support SVG icons
x11-misc/polybar:i3wm - Add support for i3 window manager
x11-misc/polybar:ipc - Add support for Inter-Process Messaging
x11-misc/polybar:mpd - Add support for Music Player Daemon
x11-misc/polybar:network - Enable network support
x11-misc/qt5ct:dbus - Enable system tray and global menu support
x11-misc/redshift:geoclue - Control dependency on app-misc/geoclue
x11-misc/rofi:windowmode - Enable normal window mode
x11-misc/rss-glx:quesoglc - Enable support for OpenGL Character Renderer
x11-misc/sddm:consolekit - Use ck-launch-session from sys-auth/consolekit by default in Xsession (no native support)
x11-misc/sddm:elogind - Use sys-auth/elogind for session tracking.
x11-misc/slim:consolekit - Enable native consolekit support
x11-misc/spacefm:gtk2 - Support GTK+ 2.x instead of GTK+ 3.x
x11-misc/spacefm:gtk3 - Support GTK+ 3.x instead of GTK+ 2.x
x11-misc/spacefm:video-thumbnails - Support video thumbnails with media-video/ffmpegthumbnailer
x11-misc/stalonetray:graceful-exit - use non-portable hack to exit gracefuly on signal
x11-misc/tint2:battery - Enable battery status plugin
x11-misc/tint2:tint2conf - Build/Install tint2conf as well
x11-misc/wbar:gtk - Enables the gtk-based wbar-config GUI
x11-misc/xlockmore:vtlock - Enables support for virtual terminal locking
x11-misc/xlockmore:xlockrc - Enables xlockrc for people without PAM
x11-misc/xmobar:mpd - Support mpd plugin
x11-misc/xmobar:mpris - Enables MPRIS v1, v2 support
x11-misc/xmobar:timezone - Enables localized date support
x11-misc/xmobar:with_conduit - Use conduit to fetch weather data.
x11-misc/xmobar:with_uvmeter - Plugin to show UV data for Australia.
x11-misc/xscreensaver:gdm - Use gdmflexiserver from gnome-base/gdm instead of x11-misc/lightdm
x11-misc/xscreensaver:new-login - Enable user switching support using gdmflexiserver (x11-misc/lightdm)
x11-misc/xss-lock:man - Build and install man pages
x11-plugins/bfm:gkrellm - Enable building of app-admin/gkrellm module
x11-plugins/pidgin-mbpurple:twitgin - Enable graphical plugin for Gtk+ interface of Pidgin.
x11-plugins/pidgin-sipe:ocs2005-message-hack - Disable message timeout for OCS2005 clients which causes "false" not delivered error messages
x11-plugins/pidgin-sipe:openssl - Enable crypto support via dev-libs/openssl
x11-plugins/pidgin-sipe:telepathy - Support use as a telepathy backend
x11-plugins/pidgin-sipe:voice - Enable experimental voice/video support
x11-plugins/purple-plugin_pack:talkfilters - Enable support for app-text/talkfilters
x11-plugins/vicious:contrib - Install extra widgets, some for less common hardware, some contributed by Vicious users.
x11-plugins/wmfire:session - Enable session management
x11-terms/aterm:background - Enable background image support via media-libs/libafterimage
x11-terms/aterm:xgetdefault - Enable resources via X instead of aterm small version
x11-terms/eterm:escreen - Enable built-in app-misc/screen support
x11-terms/eterm:utempter - Include libutempter support
x11-terms/gnome-terminal:gnome-shell - Integrate with gnome-base/gnome-shell search
x11-terms/gnome-terminal:nautilus - Build gnome-base/nautilus extension
x11-terms/guake:utempter - Include utmp management support via sys-libs/libutempter
x11-terms/mlterm:brltty - Enable support for app-accessibility/brltty
x11-terms/mlterm:fcitx - Enable support for app-i18n/fcitx
x11-terms/mlterm:gtk2 - Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
x11-terms/mlterm:harfbuzz - Enable support for OpenType Layout (media-libs/harfbuzz)
x11-terms/mlterm:ibus - Enable support for app-i18n/ibus
x11-terms/mlterm:libssh2 - Enable support for net-libs/libssh2
x11-terms/mlterm:regis - Enable support for ReGIS
x11-terms/mlterm:scim - Enable support for app-i18n/scim
x11-terms/mlterm:skk - Enable support for SKK (virtual/skkserv or app-i18n/skk-jisyo)
x11-terms/mlterm:uim - Enable support for app-i18n/uim
x11-terms/mlterm:utempter - Enable support for sys-libs/libutempter
x11-terms/mlterm:wayland - Enable support for Wayland
x11-terms/mrxvt:menubar - Enable mrxvt menubar
x11-terms/mrxvt:utempter - REcords user logins. Useful on multi-user systems
x11-terms/rxvt-unicode:256-color - Enable 256 color support
x11-terms/rxvt-unicode:alt-font-width - Calculate the font width using a different method
x11-terms/rxvt-unicode:blink - Enable blinking text
x11-terms/rxvt-unicode:buffer-on-clear - Store visible output to history buffer when clearing the screen with ctrl-l. Read https://bbs.archlinux.org/viewtopic.php?id=129302
x11-terms/rxvt-unicode:fading-colors - Enable colors fading when off focus
x11-terms/rxvt-unicode:focused-urgency - Enable the urgent flag when a terminal window is focused
x11-terms/rxvt-unicode:font-styles - Enable support for bold and italic fonts
x11-terms/rxvt-unicode:iso14755 - Enable ISO-14755 support
x11-terms/rxvt-unicode:mousewheel - Enable scrolling via mouse wheel or buttons 4 and 5
x11-terms/rxvt-unicode:perl - Enable perl script support. You can still disable this at runtime with -pe ""
x11-terms/rxvt-unicode:pixbuf - Enable transparency support using gtk's pixbuf
x11-terms/rxvt-unicode:secondary-wheel - Support for wheel scrolling on secondary screens (like mutt). Read http://lists.schmorp.de/pipermail/rxvt-unicode/2011q4/001491.html
x11-terms/rxvt-unicode:unicode3 - Use 21 instead of 16 bits to represent unicode characters
x11-terms/rxvt-unicode:wcwidth - Enable wide char width support
x11-terms/terminator:libnotify - Enables desktop notifications viadev-python/notify-python
x11-terms/xfce4-terminal:utempter - Include utmp management support via sys-libs/libutempter
x11-terms/xterm:openpty - Use openpty() in preference to posix_openpt()
x11-terms/xterm:toolbar - Enable the xterm toolbar to be built
x11-themes/comix-xcursors:lefthanded - Install lefthanded version of theme in addition to default one
x11-themes/comix-xcursors:opaque - Install non-transparent version of theme in addition to default one
x11-themes/gentoo-artwork:grub - Install extra sys-boot/grub themes
x11-themes/gentoo-artwork:icons - Install icons
x11-themes/gentoo-artwork:lilo - Install extra sys-boot/lilo themes
x11-themes/gentoo-artwork:pixmaps - Install pixmaps
x11-themes/gtk-engines-murrine:animation-rtl - Progressbar animation from right to left
x11-themes/gtk-engines-murrine:themes - Pull in themes via x11-themes/murrine-themes
x11-themes/kfaenza:additional - Install additional KFaenza icons. See third homepage for details
x11-themes/light-themes:gtk3 - Support GTK 3.x, too
x11-themes/mate-themes-meta:gtk2-only - Allow dependency-resolution for a system without GTK+3
x11-themes/redhat-artwork:audacious - Install media-sound/audacious theme
x11-themes/redhat-artwork:cursors - Install Bluecurve cursors
x11-themes/redhat-artwork:gdm - Install Bluecurve gnome-base/gdm theme
x11-themes/redhat-artwork:icons - Install Bluecurve icons
x11-themes/redhat-artwork:nautilus - Install Bluecurve gnome-base/nautilus icons
x11-themes/vertex-theme:cinnamon - Install theme for gnome-extra/cinnamon
x11-themes/vertex-theme:gnome-shell - Install theme for gnome-base/gnome-shell
x11-themes/vertex-theme:mate - Install Metacity theme for mate-base/mate
x11-themes/vertex-theme:xfce - Install theme for xfce-base/xfwm4
x11-themes/zuki-themes:gnome-shell - Install theme for gnome-base/gnome-shell
x11-themes/zuki-themes:mate - Install Metacity theme for mate-base/mate
x11-themes/zuki-themes:xfce - Install theme for xfce-base/xfwm4
x11-themes/zukitwo:gnome-shell - Install theme for gnome-base/gnome-shell
x11-wm/enlightenment:packagekit - Enable module for package manager integration
x11-wm/fluxbox:bidi - Enable bidirectional language support with dev-libs/fribidi
x11-wm/fluxbox:slit - Enables the Fluxbox slit (or dock)
x11-wm/fluxbox:systray - Enables the system tray in the Fluxbox toolbar
x11-wm/fluxbox:toolbar - Enables the Fluxbox toolbar
x11-wm/fvwm:gtk2-perl - Enable GTK2 Perl bindings
x11-wm/fvwm:lock - Enable screen locking
x11-wm/fvwm:netpbm - Enable NetPBM support (used by FvwmScript-ScreenDump)
x11-wm/fvwm:rplay - Enable rplay support
x11-wm/fvwm:stroke - Mouse Gesture support
x11-wm/i3:doc - Build and install the HTML documentation and regenerate the man pages
x11-wm/lumina:desktop-utils - Build and install lumina's desktop-utils
x11-wm/musca:apis - Optionally install the experimental `apis' window manager
x11-wm/musca:xlisten - Optionally install the xlisten utility
x11-wm/mutter:gles2 - Enable OpenGL ES 2.0 support
x11-wm/openbox:session - Enables support for session managers
x11-wm/openbox:xdg - Install the python xdg files for xdg autostart
x11-wm/pekwm:contrib - Install optional extras in the documentation directory
x11-wm/pekwm:themes - Install additional themes
x11-wm/ratpoison:history - Use sys-libs/readline for history handling
x11-wm/ratpoison:sloppy - Install sloppy, a focus-follows-mouse implementation for ratpoison
x11-wm/ratpoison:xrandr - Enable support for XRandR
x11-wm/windowmaker:modelock - Enable XKB language status lock support. README says: "If you don't know what it is you probably don't need it."
x11-wm/windowmaker:xrandr - Enable XRandR window extension support
x11-wm/xmonad:default-term - Pull terminal specified in default xmonad config to be a bit less hostile by default.
x11-wm/xmonad:no-autorepeat-keys - Allow ignoring of keyboard autorepeat.
x11-wm/xpra:client - Build client-side code
x11-wm/xpra:clipboard - Enable clipboard support
x11-wm/xpra:csc - Enable csc softscaler support
x11-wm/xpra:dec_avcodec2 - Enable avcodec2 decoder support
x11-wm/xpra:enc_ffmpeg - Enable advanced ffmpeg/libav encoder support
x11-wm/xpra:enc_x264 - Enable x264 encoder support
x11-wm/xpra:enc_x265 - Enable x265 encoder support
x11-wm/xpra:lz4 - Enable support for lz4 compression
x11-wm/xpra:pillow - Enable pillow support
x11-wm/xpra:server - Build server-side code
x11-wm/xpra:vpx - Enable vpx image format support
x11-wm/xpra:webcam - Enable webcam support via opencv
xfce-base/garcon:gtk2 - Build the garcon-gtk2-1 library (required for xfce-base/xfce4-panel < 4.13 only).
xfce-base/libxfce4ui:glade - Build support for Glade 3's GtkBuilder implementation
xfce-base/thunar:trash-panel-plugin - Build the trash status indicator plugin for the XFCE panel
xfce-base/xfce4-settings:libcanberra - Enable sound event support using media-libs/libcanberra
xfce-base/xfce4-settings:xklavier - Enable keyboard layout selection support using x11-libs/libxklavier
xfce-base/xfdesktop:thunar - Build support for desktop icons (for example, launchers and folders)
xfce-base/xfwm4:xpresent - Enable the XPresent extension for sync to vblank
xfce-extra/tumbler:odf - Enable support for .odf thumbnailers by using gnome-extra/libgsf
xfce-extra/xfce4-clipman-plugin:qrcode - Enable support for media-gfx/qrencode
xfce-extra/xfce4-mpc-plugin:libmpd - Build using media-libs/libmpd backend, instead of native fallback which is preferred
xfce-extra/xfce4-playercontrol-plugin:audacious - Enable Audacious support
xfce-extra/xfce4-playercontrol-plugin:mpd - Enable Music Player Daemon support
xfce-extra/xfce4-power-manager:panel-plugin - Build the power management plugin for the XFCE panel
xfce-extra/xfce4-pulseaudio-plugin:keybinder - Enable support for global hotkeys using dev-libs/keybinder.
xfce-extra/xfce4-pulseaudio-plugin:wnck - Enable experimental support for raising media player windows using x11-libs/libwnck.
xfce-extra/xfce4-soundmenu-plugin:glyr - Enable music metadata searchengine support using media-libs/glyr
xfce-extra/xfce4-soundmenu-plugin:keybinder - Enable shortcut support using dev-libs/keybinder
xfce-extra/xfce4-soundmenu-plugin:lastfm - Enable last.fm support using media-libs/libclastfm
xfce-extra/xfce4-taskmanager:gtk3 - Use GTK+3 instead of GTK+2
xfce-extra/xfswitch-plugin:gdm - Compatibility with gnome-base/gdm only
xfce-extra/xfswitch-plugin:lightdm - Compatibility with x11-misc/lightdm only
xfce-extra/xfswitch-plugin:lxdm - Compatibility with lxde-base/lxdm only