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#!/bin/bash
# Copyright 1999-2006 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-6.sh,v 1.1 2008/09/20 17:46:47 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
if [[ ${0##*/} == "ac-wrapper.sh" ]] ; then
echo "Don't call this script directly" >&2
exit 1
fi
if [[ ${WANT_AUTOCONF} == "2.1" && ${0##*/} == "autom4te" ]] ; then
echo "ac-wrapper: Autoconf 2.13 doesn't contain autom4te." >&2
echo " Either unset WANT_AUTOCONF or don't execute anything" >&2
echo " that would use autom4te." >&2
exit 1
fi
#
# Set up bindings between actual version and WANT_AUTOCONF
#
vers="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
echo "ac-wrapper: Unable to locate any usuable version of autoconf." >&2
echo " I tried these versions: ${vers}" >&2
echo " With a base name of '${0}'." >&2
exit 1
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
echo "ac-wrapper: warning: invalid WANT_AUTOCONF '${WANT_AUTOCONF}'; ignoring." >&2
unset WANT_AUTOCONF
break
fi
auto_ver=${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
echo "ac-wrapper: Since configure.ac is present, aclocal always use" >&2
echo " autoconf 2.59+, which conflicts with your choice and" >&2
echo " causes error. You have two options:" >&2
echo " 1. Try execute command again after removing configure.ac" >&2
echo " 2. Don't set WANT_AUTOCONF" >&2
exit 1
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
echo "ac-wrapper: DEBUG: WANT_AUTOCONF is set to ${WANT_AUTOCONF}" >&2
fi
echo "ac-wrapper: DEBUG: will execute <${binary}>" >&2
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
echo "ac-wrapper: ${binary} is missing or not executable." >&2
echo " Please try emerging the correct version of autoconf." >&2
exit 1
fi
exec "${binary}" "$@"
echo "ac-wrapper: was unable to exec ${binary} !?" >&2
exit 1
|
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