diff options
Diffstat (limited to 'ac-wrapper.sh')
| -rwxr-xr-x | ac-wrapper.sh | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/ac-wrapper.sh b/ac-wrapper.sh new file mode 100755 index 0000000..e5eda0e --- /dev/null +++ b/ac-wrapper.sh @@ -0,0 +1,203 @@ +#!/bin/sh +# Copyright 1999-2021 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="2.71:2.5 2.70:2.5 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. |