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#!/bin/bash
# Copyright 1999-2005 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-3.1.sh,v 1.2 2005/07/16 20:31:59 azarah Exp $
# Based on the ac-wrapper.pl script provided by MandrakeSoft
# Rewritten in bash by Gregorio Guidi
#
# Executes the correct autoconf version.
#
# - defaults to latest version (2.5x)
# - runs autoconf 2.13 only if:
# - envvar WANT_AUTOCONF is set to `2.1'
# -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" && ${0##*/} == "autom4te" ]] ; then
echo "ac-wrapper: Autoconf 2.13 doesn't contain autom4te." >&2
echo " Either unset WANT_AUTOCONF or don't execute anything" >&2
echo " that would use autom4te." >&2
exit 1
fi
binary_new="${0}-2.59"
binary_old="${0}-2.13"
binary=${binary_new}
acprereq_version() {
# Add --posix to below awk to make sure it will run on macosx, etc
awk \
'($0 !~ /^[[:space:]]*(#|dnl)/) {
# The following is replaced by below, as we cannot use match()
# with a third argument with non-gawk (posix) versions of awk:
#
#if (match($0, "AC_PREREQ\\(\\[?([0-9]\\.[0-9])", res))
# VERSIONS[COUNT++] = res[1]
#
sindex = match($0, /AC_PREREQ\(\[?([0-9]\.[0-9])/)
if (sindex > 0) {
sindex += length("AC_PREREQ(")
if (substr($0, sindex, 1) == "[")
sindex++
VERSIONS[COUNT++] = substr($0, sindex, 3)
}
}
END {
# The following is replaced by below, as we cannot use asort()
# with non-gawk (posix) versions of awk:
#
#asort(VERSIONS)
#
VERSION = VERSIONS[0]
# We need to get the biggest version and print that
for (x = 0; x <= COUNT;x++)
if (VERSIONS[x] > VERSION)
VERSION=VERSIONS[x]
print VERSION
}' "$@"
}
generated_version() {
# Add --posix to below awk to make sure it will run on macosx, etc
awk \
'{
# The following is replaced by below, as we cannot use match()
# with a third argument with non-gawk (posix) versions of awk:
#
#if (match($0,
# "^# Generated (by (GNU )?Autoconf|automatically using autoconf version) ([0-9].[0-9])",
# res))
# { print res[3]; exit }
#
# First try for newer versions of autoconf
sindex = match($0, /Generated by GNU Autoconf ([0-9]\.[0-9])/)
if (sindex > 0)
# Now chop the first part before the version
sindex += length("Generated by GNU Autoconf ")
# No version, so try older versions of autoconf
if (sindex <= 0) {
sindex = match($0, /Generated automatically using autoconf version ([0-9]\.[0-9])/)
if (sindex > 0)
sindex += length("Generated automatically using autoconf version ")
}
# Ok, we got a version
if (sindex > 0) {
print substr($0, sindex, 3)
exit
}
}' "$@"
}
#
# autodetect routine
#
if [[ ${WANT_AUTOCONF} != "2.5" ]] ; then
if [[ ${WANT_AUTOCONF} == "2.1" ]] ; then
if [[ ! -f "configure.ac" ]] ; then
binary=${binary_old}
else
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
else
# Automake-1.7 and better requie autoconf-2.5x
case "${WANT_AUTOMAKE}" in
1.[7-9]) ;;
*)
acfiles=$(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 [[ ${confversion} == "2.1" && ! -f "configure.ac" ]] ; then
binary="${binary_old}"
fi
esac
fi
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
#
if [[ ${binary} == "${binary_new}" ]] ; then
export WANT_AUTOCONF="2.5"
elif [[ ${binary} == "${binary_old}" ]] ; then
export WANT_AUTOCONF="2.1"
fi
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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