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#!/bin/sh
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# 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; }
unset IFS
which() {
local p
IFS=: # we don't use IFS anywhere, so don't bother saving/restoring
for p in ${PATH} ; do
p="${p}/$1"
[ -e "${p}" ] && echo "${p}" && return 0
done
unset IFS
return 1
}
#
# Sanitize argv[0] since it isn't always a full path #385201
#
argv0=${0##*/}
case ${0} in
${argv0})
# find it in PATH
if ! full_argv0=$(which "${argv0}") ; then
err "could not locate ${argv0}; file a bug"
fi
;;
*)
# re-use full/relative paths
full_argv0=$0
;;
esac
if [ "${argv0}" = "ac-wrapper.sh" ] ; then
err "Don't call this script directly"
fi
if [ "${WANT_AUTOCONF}" = "2.1" ] && [ "${argv0}" = "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
if ! seq 0 0 2>/dev/null 1>&2 ; then #338518
seq() {
local f l i
case $# in
1) f=1 i=1 l=$1;;
2) f=$1 i=1 l=$2;;
3) f=$1 i=$2 l=$3;;
esac
while :; do
[ $l -lt $f -a $i -gt 0 ] && break
[ $f -lt $l -a $i -lt 0 ] && break
echo $f
: $(( f += i ))
done
return 0
}
fi
#
# Set up bindings between actual version and WANT_AUTOCONF;
# Start at last known unstable/stable versions to speed up lookup process.
#
if [ -z "${KNOWN_AUTOCONF}" ]; then
KNOWN_AUTOCONF="2.70_beta2:2.5 2.69:2.5"
fi
vers="${KNOWN_AUTOCONF} 9999:2.5 $(printf '2.%s:2.5 ' `seq 99 -1 59`) 2.13:2.1"
binary=""
for v in ${vers} ; do
auto_ver=${v%:*}
if [ -z "${binary}" ] && [ -x "${full_argv0}-${auto_ver}" ] ; then
binary="${full_argv0}-${auto_ver}"
break
fi
done
if [ -z "${binary}" ] ; then
err "Unable to locate any usuable version of autoconf.\n" \
"\tI tried these versions: ${vers}\n" \
"\tWith a base name of '${full_argv0}'."
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 ${WANT_AUTOCONF} ; do
if [ -x "${full_argv0}-${wx}" ] ; then
binary="${full_argv0}-${wx}"
v="x"
elif [ "${wx}" = "${want_ver}" ] && [ -x "${full_argv0}-${auto_ver}" ] ; then
binary="${full_argv0}-${auto_ver}"
v="x"
fi
done
[ "${v}" = "x" ] && break
done
fi
#
# autodetect helpers
#
acprereq_version() {
sed -n -r \
-e '/^\s*(#|dnl)/d' \
-e '/AC_PREREQ/s:.*AC_PREREQ\s*\(\[?\s*([0-9.]+)\s*\]?\):\1:p' \
"$@" |
LC_ALL=C sort -n -t . |
tail -1
}
generated_version() {
local re='^# Generated (by (GNU )?Autoconf|automatically using autoconf version) ([0-9.]+).*'
sed -n -r "/${re}/{s:${re}:\3:;p;q}" "$@"
}
#
# 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:-2.1}" = "2.1" ] && [ -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=$(ls aclocal.m4 acinclude.m4 configure.in configure.ac 2>/dev/null)
[ -n "${acfiles}" ] && confversion=$(acprereq_version ${acfiles})
[ -z "${confversion}" ] && [ -r "configure" ] \
&& confversion=$(generated_version configure)
if [ "${confversion}" = "2.1" ] && [ ! -f "configure.ac" ] ; then
binary="${full_argv0}-2.13"
fi
esac
fi
if [ -n "${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
#
if [ -z "${WANT_AUTOCONF}" ] ; then
for v in ${vers} ; do
auto_ver=${v%:*}
want_ver=${v#*:}
if [ "${binary}" = "${full_argv0}-${auto_ver}" ] ; then
export WANT_AUTOCONF="${want_ver}"
break
fi
done
fi
#
# Now try to run the binary
#
if [ ! -x "${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}" "$@"
# The shell will error out if `exec` failed.
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