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#!/bin/sh
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-devel/autoconf-wrapper/files/ac-wrapper-8.sh,v 1.2 2010/03/07 15:01:09 vapier Exp $
# Based on the ac-wrapper.pl script provided by MandrakeSoft
# Rewritten in bash by Gregorio Guidi
#
# Executes the correct autoconf version.
#
# - defaults to newest version available (hopefully autoconf-2.60)
# - runs autoconf 2.13 if:
# - envvar WANT_AUTOCONF is set to `2.1'
# -or-
# - `ac{local,include}.m4' or `configure.{in,ac}' have AC_PREREQ(2.1) (not higher)
# -or-
# - `configure' is already present and was generated by autoconf 2.13
warn() { printf "ac-wrapper: $*\n" 1>&2; }
err() { warn "$@"; exit 1; }
if [ "${0##*/}" = "ac-wrapper.sh" ] ; then
err "Don't call this script directly"
fi
if [ "${WANT_AUTOCONF}" = "2.1" ] && [ "${0##*/}" = "autom4te" ] ; then
err "Autoconf 2.13 doesn't contain autom4te.\n" \
" Either unset WANT_AUTOCONF or don't execute anything\n" \
" that would use autom4te."
fi
#
# Set up bindings between actual version and WANT_AUTOCONF
#
vers="2.65:2.5 2.64:2.5 2.63:2.5 2.62:2.5 2.61:2.5 2.60:2.5 2.59:2.5 2.13:2.1"
binary=""
for v in ${vers} ; do
auto_ver=${v%:*}
if [ -z "${binary}" ] && [ -x "${0}-${auto_ver}" ] ; then
binary="${0}-${auto_ver}"
fi
done
if [ -z "${binary}" ] ; then
err "Unable to locate any usuable version of autoconf.\n" \
"\tI tried these versions: ${vers}\n" \
"\tWith a base name of '${0}'."
fi
#
# Check the WANT_AUTOCONF setting. We accept a whitespace delimited
# list of autoconf versions.
#
if [ -n "${WANT_AUTOCONF}" ] ; then
for v in ${vers} x ; do
if [ "${v}" = "x" ] ; then
warn "warning: invalid WANT_AUTOCONF '${WANT_AUTOCONF}'; ignoring."
unset WANT_AUTOCONF
break
fi
auto_ver=${v%:*}
want_ver=${v#*:}
for wx in ${WANT_AUTOCONF} ; do
if [ "${wx}" = "${want_ver}" ] && [ -x "${0}-${auto_ver}" ] ; then
binary="${0}-${auto_ver}"
v="x"
fi
done
[ "${v}" = "x" ] && break
done
fi
#
# autodetect helpers
#
acprereq_version() {
gawk \
'($0 !~ /^[[:space:]]*(#|dnl)/) {
if (match($0, "AC_PREREQ\\(\\[?([0-9]\\.[0-9])", res))
VERSIONS[COUNT++] = res[1]
}
END {
asort(VERSIONS)
print VERSIONS[COUNT]
}' "$@"
}
generated_version() {
gawk \
'{
if (match($0,
"^# Generated (by (GNU )?Autoconf|automatically using autoconf version) ([0-9].[0-9])",
res)) {
print res[3]
exit
}
}' "$@"
}
#
# autodetect routine
#
if [ "${WANT_AUTOCONF}" = "2.1" ] && [ -f "configure.ac" ] ; then
err "Since configure.ac is present, aclocal always use\n" \
"\tautoconf 2.59+, which conflicts with your choice and\n" \
"\tcauses error. You have two options:\n" \
"\t1. Try execute command again after removing configure.ac\n" \
"\t2. Don't set WANT_AUTOCONF"
fi
if [ "${WANT_AUTOCONF}" != "2.5" ] && [ -n "${WANT_AUTOMAKE}" ] ; then
# Automake-1.7 and better require autoconf-2.5x so if WANT_AUTOMAKE
# is set to an older version, let's do some sanity checks.
case "${WANT_AUTOMAKE}" in
1.[456])
acfiles=$(ls ac{local,include}.m4 configure.{in,ac} 2>/dev/null)
[ -n "${acfiles}" ] && confversion=$(acprereq_version ${acfiles})
[ -z "${confversion}" ] && [ -r "configure" ] \
&& confversion=$(generated_version configure)
if [ "${confversion}" = "2.1" ] && [ ! -f "configure.ac" ] ; then
binary="${0}-2.13"
fi
esac
fi
if [ -n "${WANT_ACWRAPPER_DEBUG}" ] ; then
if [ -n "${WANT_AUTOCONF}" ] ; then
warn "DEBUG: WANT_AUTOCONF is set to ${WANT_AUTOCONF}"
fi
warn "DEBUG: will execute <${binary}>"
fi
#
# for further consistency
#
for v in ${vers} ; do
auto_ver=${v%:*}
want_ver=${v#*:}
if [ "${binary}" = "${0}-${auto_ver}" ] ; then
export WANT_AUTOCONF="${want_ver}"
fi
done
#
# Now try to run the binary
#
if [ ! -x "${binary}" ] ; then
# this shouldn't happen
err "${binary} is missing or not executable.\n" \
"\tPlease try emerging the correct version of autoconf."
fi
exec "${binary}" "$@"
err "was unable to exec ${binary} !?"
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