media-libs/opencv: revision bump to 3.1.0-r5

- Feature: added in support for installing the Python module for each
  implementation selected
  Gentoo-Bug: 593504

- Bug fix: under certain conditions the HDF5 library isn't found
  Gentoo-Bug: 588850

- Bug fix: OpenGL needs Qt or Gtk+ otherwise it's disabled

- Misc: cleaned up usex expressions
        added qtwidgets depend
        moved openmp detection to pkg_pretend as per Gentoo style guidelines

Signed off by Jonathan Scruggs (j.scruggs@gmail.com, irc: Dracwyrm)

2 files changed, 692 insertions, 0 deletions

diff --git a/media-libs/opencv/files/opencv-contrib-find-hdf5-fix.patch b/media-libs/opencv/files/opencv-contrib-find-hdf5-fix.patch
new file mode 100644
index 000000000000..af86cf98084b
--- /dev/null
+++ b/media-libs/opencv/files/opencv-contrib-find-hdf5-fix.patch
@@ -0,0 +1,392 @@
+diff -purN a/modules/hdf/cmake/FindHDF5.cmake b/modules/hdf/cmake/FindHDF5.cmake
+--- a/modules/hdf/cmake/FindHDF5.cmake	1970-01-01 01:00:00.000000000 +0100
++++ b/modules/hdf/cmake/FindHDF5.cmake	2015-09-16 17:53:05.000000000 +0100
+@@ -0,0 +1,379 @@
++#.rst:
++# FindHDF5
++# --------
++#
++# Find HDF5, a library for reading and writing self describing array data.
++#
++#
++#
++# This module invokes the HDF5 wrapper compiler that should be installed
++# alongside HDF5.  Depending upon the HDF5 Configuration, the wrapper
++# compiler is called either h5cc or h5pcc.  If this succeeds, the module
++# will then call the compiler with the -show argument to see what flags
++# are used when compiling an HDF5 client application.
++#
++# The module will optionally accept the COMPONENTS argument.  If no
++# COMPONENTS are specified, then the find module will default to finding
++# only the HDF5 C library.  If one or more COMPONENTS are specified, the
++# module will attempt to find the language bindings for the specified
++# components.  The only valid components are C, CXX, Fortran, HL, and
++# Fortran_HL.  If the COMPONENTS argument is not given, the module will
++# attempt to find only the C bindings.
++#
++# On UNIX systems, this module will read the variable
++# HDF5_USE_STATIC_LIBRARIES to determine whether or not to prefer a
++# static link to a dynamic link for HDF5 and all of it's dependencies.
++# To use this feature, make sure that the HDF5_USE_STATIC_LIBRARIES
++# variable is set before the call to find_package.
++#
++# To provide the module with a hint about where to find your HDF5
++# installation, you can set the environment variable HDF5_ROOT.  The
++# Find module will then look in this path when searching for HDF5
++# executables, paths, and libraries.
++#
++# In addition to finding the includes and libraries required to compile
++# an HDF5 client application, this module also makes an effort to find
++# tools that come with the HDF5 distribution that may be useful for
++# regression testing.
++#
++# This module will define the following variables:
++#
++# ::
++#
++#   HDF5_INCLUDE_DIRS - Location of the hdf5 includes
++#   HDF5_INCLUDE_DIR - Location of the hdf5 includes (deprecated)
++#   HDF5_DEFINITIONS - Required compiler definitions for HDF5
++#   HDF5_C_LIBRARIES - Required libraries for the HDF5 C bindings.
++#   HDF5_CXX_LIBRARIES - Required libraries for the HDF5 C++ bindings
++#   HDF5_Fortran_LIBRARIES - Required libraries for the HDF5 Fortran bindings
++#   HDF5_HL_LIBRARIES - Required libraries for the HDF5 high level API
++#   HDF5_Fortran_HL_LIBRARIES - Required libraries for the high level Fortran
++#                               bindings.
++#   HDF5_LIBRARIES - Required libraries for all requested bindings
++#   HDF5_FOUND - true if HDF5 was found on the system
++#   HDF5_VERSION - HDF5 version in format Major.Minor.Release
++#   HDF5_LIBRARY_DIRS - the full set of library directories
++#   HDF5_IS_PARALLEL - Whether or not HDF5 was found with parallel IO support
++#   HDF5_C_COMPILER_EXECUTABLE - the path to the HDF5 C wrapper compiler
++#   HDF5_CXX_COMPILER_EXECUTABLE - the path to the HDF5 C++ wrapper compiler
++#   HDF5_Fortran_COMPILER_EXECUTABLE - the path to the HDF5 Fortran wrapper compiler
++#   HDF5_DIFF_EXECUTABLE - the path to the HDF5 dataset comparison tool
++
++#=============================================================================
++# Copyright 2015 Axel Huebl, Helmholtz-Zentrum Dresden - Rossendorf
++# Copyright 2009 Kitware, Inc.
++#
++# Distributed under the OSI-approved BSD License (the "License");
++# see accompanying file Copyright.txt for details.
++#
++# This software is distributed WITHOUT ANY WARRANTY; without even the
++# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
++# See the License for more information.
++#=============================================================================
++# (To distribute this file outside of CMake, substitute the full
++#  License text for the above reference.)
++
++# This module is maintained by Will Dicharry <wdicharry@stellarscience.com>.
++
++include(SelectLibraryConfigurations)
++include(FindPackageHandleStandardArgs)
++
++# List of the valid HDF5 components
++set( HDF5_VALID_COMPONENTS
++    C
++    CXX
++    Fortran
++    HL
++    Fortran_HL
++)
++
++# Validate the list of find components.
++if( NOT HDF5_FIND_COMPONENTS )
++    set( HDF5_LANGUAGE_BINDINGS "C" )
++else()
++    # add the extra specified components, ensuring that they are valid.
++    foreach( component ${HDF5_FIND_COMPONENTS} )
++        list( FIND HDF5_VALID_COMPONENTS ${component} component_location )
++        if( ${component_location} EQUAL -1 )
++            message( FATAL_ERROR
++                "\"${component}\" is not a valid HDF5 component." )
++        else()
++            list( APPEND HDF5_LANGUAGE_BINDINGS ${component} )
++        endif()
++    endforeach()
++endif()
++
++# try to find the HDF5 wrapper compilers
++find_program( HDF5_C_COMPILER_EXECUTABLE
++    NAMES h5cc h5pcc
++    HINTS ENV HDF5_ROOT
++    PATH_SUFFIXES bin Bin
++    DOC "HDF5 Wrapper compiler.  Used only to detect HDF5 compile flags." )
++mark_as_advanced( HDF5_C_COMPILER_EXECUTABLE )
++
++find_program( HDF5_CXX_COMPILER_EXECUTABLE
++    NAMES h5c++ h5pc++
++    HINTS ENV HDF5_ROOT
++    PATH_SUFFIXES bin Bin
++    DOC "HDF5 C++ Wrapper compiler.  Used only to detect HDF5 compile flags." )
++mark_as_advanced( HDF5_CXX_COMPILER_EXECUTABLE )
++
++find_program( HDF5_Fortran_COMPILER_EXECUTABLE
++    NAMES h5fc h5pfc
++    HINTS ENV HDF5_ROOT
++    PATH_SUFFIXES bin Bin
++    DOC "HDF5 Fortran Wrapper compiler.  Used only to detect HDF5 compile flags." )
++mark_as_advanced( HDF5_Fortran_COMPILER_EXECUTABLE )
++
++find_program( HDF5_DIFF_EXECUTABLE
++    NAMES h5diff
++    HINTS ENV HDF5_ROOT
++    PATH_SUFFIXES bin Bin
++    DOC "HDF5 file differencing tool." )
++mark_as_advanced( HDF5_DIFF_EXECUTABLE )
++
++# Invoke the HDF5 wrapper compiler.  The compiler return value is stored to the
++# return_value argument, the text output is stored to the output variable.
++macro( _HDF5_invoke_compiler language output return_value )
++    if( HDF5_${language}_COMPILER_EXECUTABLE )
++        exec_program( ${HDF5_${language}_COMPILER_EXECUTABLE}
++            ARGS -show
++            OUTPUT_VARIABLE ${output}
++            RETURN_VALUE ${return_value}
++        )
++        if( ${${return_value}} EQUAL 0 )
++            # do nothing
++        else()
++            message( STATUS
++              "Unable to determine HDF5 ${language} flags from HDF5 wrapper." )
++        endif()
++    endif()
++endmacro()
++
++# Parse a compile line for definitions, includes, library paths, and libraries.
++macro( _HDF5_parse_compile_line
++    compile_line_var
++    include_paths
++    definitions
++    library_paths
++    libraries )
++
++    # Match the include paths
++    string( REGEX MATCHALL "-I([^\" ]+)" include_path_flags
++        "${${compile_line_var}}"
++    )
++    foreach( IPATH ${include_path_flags} )
++        string( REGEX REPLACE "^-I" "" IPATH ${IPATH} )
++        string( REPLACE "//" "/" IPATH ${IPATH} )
++        list( APPEND ${include_paths} ${IPATH} )
++    endforeach()
++
++    # Match the definitions
++    string( REGEX MATCHALL "-D[^ ]*" definition_flags "${${compile_line_var}}" )
++    foreach( DEF ${definition_flags} )
++        list( APPEND ${definitions} ${DEF} )
++    endforeach()
++
++    # Match the library paths
++    string( REGEX MATCHALL "-L([^\" ]+|\"[^\"]+\")" library_path_flags
++        "${${compile_line_var}}"
++    )
++
++    foreach( LPATH ${library_path_flags} )
++        string( REGEX REPLACE "^-L" "" LPATH ${LPATH} )
++        string( REPLACE "//" "/" LPATH ${LPATH} )
++        list( APPEND ${library_paths} ${LPATH} )
++    endforeach()
++
++    # now search for the library names specified in the compile line (match -l...)
++    # match only -l's preceded by a space or comma
++    # this is to exclude directory names like xxx-linux/
++    string( REGEX MATCHALL "[, ]-l([^\", ]+)" library_name_flags
++        "${${compile_line_var}}" )
++    # strip the -l from all of the library flags and add to the search list
++    foreach( LIB ${library_name_flags} )
++        string( REGEX REPLACE "^[, ]-l" "" LIB ${LIB} )
++        list( APPEND ${libraries} ${LIB} )
++    endforeach()
++endmacro()
++
++# Try to find HDF5 using an installed hdf5-config.cmake
++if( NOT HDF5_FOUND )
++    find_package( HDF5 QUIET NO_MODULE )
++    if( HDF5_FOUND )
++        set( HDF5_INCLUDE_DIRS ${HDF5_INCLUDE_DIR} )
++        set( HDF5_LIBRARIES )
++        set( HDF5_C_TARGET hdf5 )
++        set( HDF5_CXX_TARGET hdf5_cpp )
++        set( HDF5_HL_TARGET hdf5_hl )
++        set( HDF5_Fortran_TARGET hdf5_fortran )
++        set( HDF5_Fortran_HL_TARGET hdf5_hl_fortran )
++        foreach( _component ${HDF5_LANGUAGE_BINDINGS} )
++            list( FIND HDF5_VALID_COMPONENTS ${_component} _component_location )
++            get_target_property( _comp_location ${HDF5_${_component}_TARGET} LOCATION )
++            if( _comp_location )
++                set( HDF5_${_component}_LIBRARY ${_comp_location} CACHE PATH
++                    "HDF5 ${_component} library" )
++                mark_as_advanced( HDF5_${_component}_LIBRARY )
++                list( APPEND HDF5_LIBRARIES ${HDF5_${_component}_LIBRARY} )
++            endif()
++        endforeach()
++    endif()
++endif()
++
++if( NOT HDF5_FOUND )
++    _HDF5_invoke_compiler( C HDF5_C_COMPILE_LINE HDF5_C_RETURN_VALUE )
++    _HDF5_invoke_compiler( CXX HDF5_CXX_COMPILE_LINE HDF5_CXX_RETURN_VALUE )
++    _HDF5_invoke_compiler( Fortran HDF5_Fortran_COMPILE_LINE HDF5_Fortran_RETURN_VALUE )
++
++    # seed the initial lists of libraries to find with items we know we need
++    set( HDF5_C_LIBRARY_NAMES_INIT hdf5 )
++    set( HDF5_HL_LIBRARY_NAMES_INIT hdf5_hl ${HDF5_C_LIBRARY_NAMES_INIT} )
++    set( HDF5_CXX_LIBRARY_NAMES_INIT hdf5_cpp ${HDF5_C_LIBRARY_NAMES_INIT} )
++    set( HDF5_Fortran_LIBRARY_NAMES_INIT hdf5_fortran
++        ${HDF5_C_LIBRARY_NAMES_INIT} )
++    set( HDF5_Fortran_HL_LIBRARY_NAMES_INIT hdf5hl_fortran
++        ${HDF5_Fortran_LIBRARY_NAMES_INIT} )
++
++    foreach( LANGUAGE ${HDF5_LANGUAGE_BINDINGS} )
++        if( HDF5_${LANGUAGE}_COMPILE_LINE )
++            _HDF5_parse_compile_line( HDF5_${LANGUAGE}_COMPILE_LINE
++                HDF5_${LANGUAGE}_INCLUDE_FLAGS
++                HDF5_${LANGUAGE}_DEFINITIONS
++                HDF5_${LANGUAGE}_LIBRARY_DIRS
++                HDF5_${LANGUAGE}_LIBRARY_NAMES
++            )
++
++            # take a guess that the includes may be in the 'include' sibling
++            # directory of a library directory.
++            foreach( dir ${HDF5_${LANGUAGE}_LIBRARY_DIRS} )
++                list( APPEND HDF5_${LANGUAGE}_INCLUDE_FLAGS ${dir}/../include )
++            endforeach()
++        endif()
++
++        # set the definitions for the language bindings.
++        list( APPEND HDF5_DEFINITIONS ${HDF5_${LANGUAGE}_DEFINITIONS} )
++
++        # find the HDF5 include directories
++        if(${LANGUAGE} MATCHES "Fortran")
++            set(HDF5_INCLUDE_FILENAME hdf5.mod)
++        else()
++            set(HDF5_INCLUDE_FILENAME hdf5.h)
++        endif()
++
++        find_path( HDF5_${LANGUAGE}_INCLUDE_DIR ${HDF5_INCLUDE_FILENAME}
++            HINTS
++                ${HDF5_${LANGUAGE}_INCLUDE_FLAGS}
++                ENV
++                    HDF5_ROOT
++            PATHS
++                $ENV{HOME}/.local/include
++            PATH_SUFFIXES
++                include
++                Include
++        )
++        mark_as_advanced( HDF5_${LANGUAGE}_INCLUDE_DIR )
++        list( APPEND HDF5_INCLUDE_DIRS ${HDF5_${LANGUAGE}_INCLUDE_DIR} )
++
++        set( HDF5_${LANGUAGE}_LIBRARY_NAMES
++            ${HDF5_${LANGUAGE}_LIBRARY_NAMES_INIT}
++            ${HDF5_${LANGUAGE}_LIBRARY_NAMES} )
++
++        # find the HDF5 libraries
++        foreach( LIB ${HDF5_${LANGUAGE}_LIBRARY_NAMES} )
++            if( UNIX AND HDF5_USE_STATIC_LIBRARIES )
++                # According to bug 1643 on the CMake bug tracker, this is the
++                # preferred method for searching for a static library.
++                # See http://www.cmake.org/Bug/view.php?id=1643.  We search
++                # first for the full static library name, but fall back to a
++                # generic search on the name if the static search fails.
++                set( THIS_LIBRARY_SEARCH_DEBUG lib${LIB}d.a ${LIB}d )
++                set( THIS_LIBRARY_SEARCH_RELEASE lib${LIB}.a ${LIB} )
++            else()
++                set( THIS_LIBRARY_SEARCH_DEBUG ${LIB}d )
++                set( THIS_LIBRARY_SEARCH_RELEASE ${LIB} )
++            endif()
++            find_library( HDF5_${LIB}_LIBRARY_DEBUG
++                NAMES ${THIS_LIBRARY_SEARCH_DEBUG}
++                HINTS ${HDF5_${LANGUAGE}_LIBRARY_DIRS}
++                ENV HDF5_ROOT
++                PATH_SUFFIXES lib Lib )
++            find_library( HDF5_${LIB}_LIBRARY_RELEASE
++                NAMES ${THIS_LIBRARY_SEARCH_RELEASE}
++                HINTS ${HDF5_${LANGUAGE}_LIBRARY_DIRS}
++                ENV HDF5_ROOT
++                PATH_SUFFIXES lib Lib )
++            select_library_configurations( HDF5_${LIB} )
++            list(APPEND HDF5_${LANGUAGE}_LIBRARIES ${HDF5_${LIB}_LIBRARY})
++        endforeach()
++        list( APPEND HDF5_LIBRARY_DIRS ${HDF5_${LANGUAGE}_LIBRARY_DIRS} )
++
++        # Append the libraries for this language binding to the list of all
++        # required libraries.
++        list(APPEND HDF5_LIBRARIES ${HDF5_${LANGUAGE}_LIBRARIES})
++    endforeach()
++
++    # We may have picked up some duplicates in various lists during the above
++    # process for the language bindings (both the C and C++ bindings depend on
++    # libz for example).  Remove the duplicates. It appears that the default
++    # CMake behavior is to remove duplicates from the end of a list. However,
++    # for link lines, this is incorrect since unresolved symbols are searched
++    # for down the link line. Therefore, we reverse the list, remove the
++    # duplicates, and then reverse it again to get the duplicates removed from
++    # the beginning.
++    macro( _remove_duplicates_from_beginning _list_name )
++        list( REVERSE ${_list_name} )
++        list( REMOVE_DUPLICATES ${_list_name} )
++        list( REVERSE ${_list_name} )
++    endmacro()
++
++    if( HDF5_INCLUDE_DIRS )
++        _remove_duplicates_from_beginning( HDF5_INCLUDE_DIRS )
++    endif()
++    if( HDF5_LIBRARY_DIRS )
++        _remove_duplicates_from_beginning( HDF5_LIBRARY_DIRS )
++    endif()
++
++    # If the HDF5 include directory was found, open H5pubconf.h to determine if
++    # HDF5 was compiled with parallel IO support
++    set( HDF5_IS_PARALLEL FALSE )
++    set( HDF5_VERSION "" )
++    foreach( _dir IN LISTS HDF5_INCLUDE_DIRS )
++      foreach(_hdr "${_dir}/H5pubconf.h" "${_dir}/H5pubconf-64.h" "${_dir}/H5pubconf-32.h")
++        if( EXISTS "${_hdr}" )
++            file( STRINGS "${_hdr}"
++                HDF5_HAVE_PARALLEL_DEFINE
++                REGEX "HAVE_PARALLEL 1" )
++            if( HDF5_HAVE_PARALLEL_DEFINE )
++                set( HDF5_IS_PARALLEL TRUE )
++            endif()
++            unset(HDF5_HAVE_PARALLEL_DEFINE)
++
++            file( STRINGS "${_hdr}"
++                HDF5_VERSION_DEFINE
++                REGEX "^[ \t]*#[ \t]*define[ \t]+H5_VERSION[ \t]+" )
++            if( "${HDF5_VERSION_DEFINE}" MATCHES
++                "H5_VERSION[ \t]+\"([0-9]+\\.[0-9]+\\.[0-9]+).*\"" )
++                set( HDF5_VERSION "${CMAKE_MATCH_1}" )
++            endif()
++            unset(HDF5_VERSION_DEFINE)
++        endif()
++      endforeach()
++    endforeach()
++    set( HDF5_IS_PARALLEL ${HDF5_IS_PARALLEL} CACHE BOOL
++        "HDF5 library compiled with parallel IO support" )
++    mark_as_advanced( HDF5_IS_PARALLEL )
++
++    # For backwards compatibility we set HDF5_INCLUDE_DIR to the value of
++    # HDF5_INCLUDE_DIRS
++    if( HDF5_INCLUDE_DIRS )
++        set( HDF5_INCLUDE_DIR "${HDF5_INCLUDE_DIRS}" )
++    endif()
++
++endif()
++
++find_package_handle_standard_args( HDF5
++    REQUIRED_VARS HDF5_LIBRARIES HDF5_INCLUDE_DIRS
++    VERSION_VAR   HDF5_VERSION
++)
++
+diff -purN a/modules/hdf/CMakeLists.txt b/modules/hdf/CMakeLists.txt
+--- a/modules/hdf/CMakeLists.txt	2015-12-17 17:11:31.000000000 +0000
++++ b/modules/hdf/CMakeLists.txt	2016-09-19 15:24:47.958650311 +0100
+@@ -1,4 +1,4 @@
+-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR})
++set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_LIST_DIR}/cmake)
+ 
+ find_package(HDF5)
+ if(HDF5_FOUND)
diff --git a/media-libs/opencv/opencv-3.1.0-r5.ebuild b/media-libs/opencv/opencv-3.1.0-r5.ebuild
new file mode 100644
index 000000000000..581b725ab677
--- /dev/null
+++ b/media-libs/opencv/opencv-3.1.0-r5.ebuild
@@ -0,0 +1,300 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+PYTHON_COMPAT=( python{2_7,3_4,3_5} )
+
+inherit toolchain-funcs cmake-utils python-r1 java-pkg-opt-2 java-ant-2
+
+DESCRIPTION="A collection of algorithms and sample code for
+	various computer vision problems"
+HOMEPAGE="http://opencv.org"
+
+SRC_URI="
+	mirror://sourceforge/opencvlibrary/opencv-unix/${PV}/${P}.zip
+	https://github.com/Itseez/${PN}/archive/${PV}.zip -> ${P}.zip
+	contrib? (
+		https://github.com/Itseez/${PN}_contrib/archive/cd5993c6576267875adac300b9ddd1f881bb1766.zip -> ${P}_contrib.zip )" #commit from Sun, 27 Mar 2016 17:31:51
+
+LICENSE="BSD"
+SLOT="0/3.1" # subslot = libopencv* soname version
+KEYWORDS="~amd64 ~arm ~ppc ~ppc64 ~x86 ~amd64-linux"
+IUSE="contrib cuda +eigen examples ffmpeg gdal gphoto2 gstreamer gtk \
+	ieee1394 ipp jpeg jpeg2k libav opencl openexr opengl openmp pch png \
+	+python qt4 qt5 testprograms threads tiff vaapi v4l vtk webp xine"
+
+# OpenGL needs gtk or Qt installed to activate, otherwise build system
+# will silently disable it without the user knowing, which defeats the
+# purpose of the opengl use flag.
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )
+	?? ( qt4 qt5 )
+	opengl? ( || ( gtk qt4 qt5 ) )"
+
+# The following logic is intrinsic in the build system, but we do not enforce
+# it on the useflags since this just blocks emerging pointlessly:
+#	gtk? ( !qt4 )
+#	openmp? ( !threads )
+
+RDEPEND="
+	app-arch/bzip2
+	sys-libs/zlib
+	cuda? ( dev-util/nvidia-cuda-toolkit:0= )
+	ffmpeg? (
+		libav? ( media-video/libav:0= )
+		!libav? ( media-video/ffmpeg:0= )
+	)
+	gdal? ( sci-libs/gdal )
+	gphoto2? ( media-libs/libgphoto2 )
+	gstreamer? (
+		media-libs/gstreamer:1.0
+		media-libs/gst-plugins-base:1.0
+	)
+	gtk? (
+		dev-libs/glib:2
+		x11-libs/gtk+:2
+		opengl? ( x11-libs/gtkglext )
+	)
+	java? ( >=virtual/jre-1.6:* )
+	jpeg? ( virtual/jpeg:0 )
+	jpeg2k? ( media-libs/jasper )
+	ieee1394? (
+		media-libs/libdc1394
+		sys-libs/libraw1394
+	)
+	ipp? ( sci-libs/ipp )
+	opencl? ( virtual/opencl )
+	openexr? ( media-libs/openexr )
+	opengl? ( virtual/opengl virtual/glu )
+	png? ( media-libs/libpng:0= )
+	python? ( ${PYTHON_DEPS} dev-python/numpy[${PYTHON_USEDEP}] )
+	qt4? (
+		dev-qt/qtgui:4
+		dev-qt/qttest:4
+		opengl? ( dev-qt/qtopengl:4 )
+	)
+	qt5? (
+		dev-qt/qtgui:5
+		dev-qt/qtwidgets:5
+		dev-qt/qttest:5
+		dev-qt/qtconcurrent:5
+		opengl? ( dev-qt/qtopengl:5 )
+	)
+	threads? ( dev-cpp/tbb )
+	tiff? ( media-libs/tiff:0 )
+	v4l? ( >=media-libs/libv4l-0.8.3 )
+	vtk? ( sci-libs/vtk[rendering] )
+	webp? ( media-libs/libwebp )
+	xine? ( media-libs/xine-lib )
+"
+DEPEND="${RDEPEND}
+	virtual/pkgconfig
+	eigen? ( dev-cpp/eigen:3 )
+	java?  ( >=virtual/jdk-1.6 )
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-3.0.0-gles.patch
+	"${FILESDIR}"/${PN}-3.1.0-cmake-no-opengl.patch
+	"${FILESDIR}"/${P}-git-autodetect.patch
+	"${FILESDIR}"/${P}-java-magic.patch
+	"${FILESDIR}"/${P}-gentooify-python.patch
+)
+
+GLOBALCMAKEARGS=()
+
+pkg_pretend() {
+	if use openmp; then
+		tc-has-openmp || die "Please switch to an openmp compatible compiler"
+	fi
+}
+
+pkg_setup() {
+	java-pkg-opt-2_pkg_setup
+}
+
+src_prepare() {
+	default
+
+	# remove bundled stuff
+	rm -rf 3rdparty || die "Removing 3rd party components failed"
+	sed -i \
+		-e '/add_subdirectory(.*3rdparty.*)/ d' \
+		CMakeLists.txt cmake/*cmake || die
+
+	java-pkg-opt-2_src_prepare
+
+	# Out-of-$S patching
+	if use contrib; then
+		cd "${WORKDIR}"/opencv_contrib-${PV} || die "cd failed"
+		epatch "${FILESDIR}"/${PN}-contrib-find-hdf5-fix.patch
+	fi
+}
+
+src_configure() {
+	JAVA_ANT_ENCODING="iso-8859-1"
+	# set encoding so even this cmake build will pick it up.
+	export ANT_OPTS+=" -Dfile.encoding=iso-8859-1"
+	java-ant-2_src_configure
+
+	# please dont sort here, order is the same as in CMakeLists.txt
+	GLOBALCMAKEARGS=(
+	# Optional 3rd party components
+	# ===================================================
+		-DWITH_1394=$(usex ieee1394)
+		-DWITH_AVFOUNDATION=OFF 	# IOS
+		-DWITH_VTK=$(usex vtk)
+		-DWITH_EIGEN=$(usex eigen)
+		-DWITH_VFW=OFF     		# Video windows support
+		-DWITH_FFMPEG=$(usex ffmpeg)
+		-DWITH_GSTREAMER=$(usex gstreamer)
+		-DWITH_GSTREAMER_0_10=OFF	# Don't want this
+		-DWITH_GTK=$(usex gtk)
+		-DWITH_GTK_2_X=OFF
+		-DWITH_IPP=$(usex ipp)
+		-DWITH_JASPER=$(usex jpeg2k)
+		-DWITH_JPEG=$(usex jpeg)
+		-DWITH_WEBP=$(usex webp)
+		-DWITH_OPENEXR=$(usex openexr)
+		-DWITH_OPENGL=$(usex opengl)
+		-DWITH_OPENNI=OFF 		# Not packaged
+		-DWITH_OPENNI2=OFF 		# Not packaged
+		-DWITH_PNG=$(usex png)
+		-DWITH_PVAPI=OFF		# Not packaged
+		-DWITH_GIGEAPI=OFF
+		# Qt in CMakeList.txt here: See below
+		-DWITH_WIN32UI=OFF		# Windows only
+		-DWITH_QUICKTIME=OFF
+		-DWITH_TBB=$(usex threads)
+		-DWITH_OPENMP=$(usex openmp)
+		-DWITH_CSTRIPES=OFF
+		-DWITH_PTHREADS_PF=ON
+		-DWITH_TIFF=$(usex tiff)
+		-DWITH_UNICAP=OFF		# Not packaged
+		-DWITH_V4L=$(usex v4l)
+		-DWITH_LIBV4L=$(usex v4l)
+		-DWITH_DSHOW=ON			# direct show supp
+		-DWITH_MSMF=OFF
+		-DWITH_XIMEA=OFF 		# Windows only
+		-DWITH_XINE=$(usex xine)
+		-DWITH_CLP=OFF
+		-DWITH_OPENCL=$(usex opencl)
+		-DWITH_OPENCL_SVM=OFF
+		-DWITH_OPENCLAMDFFT=$(usex opencl)
+		-DWITH_OPENCLAMDBLAS=$(usex opencl)
+		-DWITH_DIRECTX=OFF
+		-DWITH_INTELPERC=OFF
+		-DWITH_JAVA=$(usex java) # Ant needed, no compile flag
+		-DWITH_IPP_A=OFF
+		-DWITH_MATLAB=ON
+		-DWITH_VA=$(usex vaapi)
+		-DWITH_VA_INTEL=$(usex vaapi)
+		-DWITH_GDAL=$(usex gdal)
+		-DWITH_GPHOTO2=$(usex gphoto2)
+	# ===================================================
+	# CUDA build components: nvidia-cuda-toolkit takes care of GCC version
+	# ===================================================
+		-DWITH_CUDA=$(usex cuda)
+		-DWITH_CUBLAS=$(usex cuda)
+		-DWITH_CUFFT=$(usex cuda)
+		-DCUDA_NPP_LIBRARY_ROOT_DIR=$(usex cuda "${EPREFIX}/opt/cuda" "")
+	# ===================================================
+	# OpenCV build components
+	# ===================================================
+		-DBUILD_SHARED_LIBS=ON
+		-DBUILD_ANDROID_EXAMPLES=OFF
+		-DBUILD_DOCS=OFF # Doesn't install anyways.
+		-DBUILD_EXAMPLES=$(usex examples)
+		-DBUILD_PERF_TESTS=OFF
+		-DBUILD_TESTS=$(usex testprograms)
+	# ===================================================
+	# OpenCV installation options
+	# ===================================================
+		-DINSTALL_C_EXAMPLES=$(usex examples)
+		-DINSTALL_TESTS=$(usex testprograms)
+	# ===================================================
+	# OpenCV build options
+	# ===================================================
+		-DENABLE_PRECOMPILED_HEADERS=$(usex pch)
+		-DHAVE_opencv_java=$(usex java YES NO)
+	# ===================================================
+	# things we want to be hard off or not yet figured out
+	# ===================================================
+		-DBUILD_PACKAGE=OFF
+		-DENABLE_PROFILING=OFF
+	# ===================================================
+	# things we want to be hard enabled not worth useflag
+	# ===================================================
+		-DCMAKE_SKIP_RPATH=ON
+		-DOPENCV_DOC_INSTALL_PATH=
+	)
+
+	if use qt4; then
+		GLOBALCMAKEARGS+=( -DWITH_QT=4 )
+	elif use qt5; then
+		GLOBALCMAKEARGS+=( -DWITH_QT=5 )
+	else
+		GLOBALCMAKEARGS+=( -DWITH_QT=OFF )
+	fi
+
+	use contrib && GLOBALCMAKEARGS+=(
+		-DOPENCV_EXTRA_MODULES_PATH="${WORKDIR}/opencv_contrib-${PV}/modules"
+	)
+
+	# workaround for bug 413429
+	tc-export CC CXX
+
+	local mycmakeargs=( ${GLOBALCMAKEARGS[@]}
+			    -DWITH_PYTHON=OFF
+			    -DINSTALL_PYTHON_EXAMPLES=OFF
+	)
+
+	cmake-utils_src_configure
+}
+
+python_module_compile() {
+	local mycmakeargs=( ${GLOBALCMAKEARGS[@]} )
+
+	# Set all python variables to load the correct Gentoo paths
+	mycmakeargs+=(
+		-DWITH_PYTHON=ON
+		-DGENTOO_PYTHON_EXECUTABLE=${EPYTHON}
+		-DGENTOO_PYTHON_INCLUDE_PATH="$(python_get_includedir)"
+		-DGENTOO_PYTHON_LIBRARIES="$(python_get_library_path)"
+		-DGENTOO_PYTHON_PACKAGES_PATH="$(python_get_sitedir)"
+		-DGENTOO_PYTHON_MAJOR=${EPYTHON:6:1}
+		-DGENTOO_PYTHON_MINOR=${EPYTHON:8:1}
+		-DGENTOO_PYTHON_DEBUG_LIBRARIES="" # Absolutely no clue what this is
+	)
+
+	if use examples; then
+		mycmakeargs+=( -DINSTALL_PYTHON_EXAMPLES=ON )
+	else
+		mycmakeargs+=( -DINSTALL_PYTHON_EXAMPLES=OFF )
+	fi
+
+	# Compile and install all at once because configuration will be wiped
+	# for each impl of Python
+	BUILD_DIR="${WORKDIR}"/${P}_build
+	cd "${BUILD_DIR}" || die "cd failed"
+
+	# Regenerate cache file. Can't use rebuild_cache as it won't
+	# have the Gentoo specific options.
+	rm -rf CMakeCache.txt || die "rm failed"
+	cmake-utils_src_configure
+	cmake-utils_src_compile opencv_${EPYTHON:0:7}
+	cmake-utils_src_install install/fast
+
+	# Remove compiled binary so new version compiles
+	# Avoid conflicts with new module builds as build system doesn't
+	# really support it.
+	emake -C modules/${EPYTHON:0:7} clean
+	rm -rf modules/${EPYTHON:0:7} || die "rm failed"
+}
+
+src_install() {
+	cmake-utils_src_install
+
+	# Build and install the python modules for all targets
+	use python && python_foreach_impl python_module_compile
+}