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202 lines
4.9 KiB
202 lines
4.9 KiB
#!/bin/sh
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# Copyright 1999-2018 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# Based on the ac-wrapper.pl script provided by MandrakeSoft
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# Rewritten in bash by Gregorio Guidi
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#
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# Executes the correct autoconf version.
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#
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# - defaults to newest version available (hopefully autoconf-2.60)
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# - runs autoconf 2.13 if:
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# - envvar WANT_AUTOCONF is set to `2.1'
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# -or-
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# - `ac{local,include}.m4' or `configure.{in,ac}' have AC_PREREQ(2.1) (not higher)
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# -or-
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# - `configure' is already present and was generated by autoconf 2.13
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warn() { printf "ac-wrapper: $*\n" 1>&2; }
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err() { warn "$@"; exit 1; }
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unset IFS
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which() {
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local p
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IFS=: # we don't use IFS anywhere, so don't bother saving/restoring
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for p in ${PATH} ; do
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p="${p}/$1"
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[ -e "${p}" ] && echo "${p}" && return 0
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done
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unset IFS
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return 1
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}
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#
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# Sanitize argv[0] since it isn't always a full path #385201
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#
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argv0=${0##*/}
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case ${0} in
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${argv0})
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# find it in PATH
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if ! full_argv0=$(which "${argv0}") ; then
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err "could not locate ${argv0}; file a bug"
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fi
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;;
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*)
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# re-use full/relative paths
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full_argv0=$0
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;;
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esac
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if [ "${argv0}" = "ac-wrapper.sh" ] ; then
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err "Don't call this script directly"
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fi
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if [ "${WANT_AUTOCONF}" = "2.1" ] && [ "${argv0}" = "autom4te" ] ; then
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err "Autoconf 2.13 doesn't contain autom4te.\n" \
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" Either unset WANT_AUTOCONF or don't execute anything\n" \
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" that would use autom4te."
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fi
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if ! seq 0 0 2>/dev/null 1>&2 ; then #338518
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seq() {
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local f l i
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case $# in
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1) f=1 i=1 l=$1;;
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2) f=$1 i=1 l=$2;;
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3) f=$1 i=$2 l=$3;;
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esac
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while :; do
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[ $l -lt $f -a $i -gt 0 ] && break
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[ $f -lt $l -a $i -lt 0 ] && break
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echo $f
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: $(( f += i ))
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done
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return 0
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}
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fi
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#
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# Set up bindings between actual version and WANT_AUTOCONF;
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# Start at last known unstable/stable versions to speed up lookup process.
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#
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KNOWN_AUTOCONF="2.69:2.5 2.68:2.5"
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vers="${KNOWN_AUTOCONF} 9999:2.5 $(printf '2.%s:2.5 ' `seq 99 -1 59`) 2.13:2.1"
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binary=""
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for v in ${vers} ; do
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auto_ver=${v%:*}
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if [ -z "${binary}" ] && [ -x "${full_argv0}-${auto_ver}" ] ; then
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binary="${full_argv0}-${auto_ver}"
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break
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fi
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done
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if [ -z "${binary}" ] ; then
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err "Unable to locate any usuable version of autoconf.\n" \
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"\tI tried these versions: ${vers}\n" \
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"\tWith a base name of '${full_argv0}'."
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fi
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#
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# Check the WANT_AUTOCONF setting. We accept a whitespace delimited
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# list of autoconf versions.
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#
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if [ -n "${WANT_AUTOCONF}" ] ; then
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for v in ${vers} x ; do
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if [ "${v}" = "x" ] ; then
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warn "warning: invalid WANT_AUTOCONF '${WANT_AUTOCONF}'; ignoring."
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unset WANT_AUTOCONF
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break
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fi
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auto_ver=${v%:*}
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want_ver=${v#*:}
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for wx in ${WANT_AUTOCONF} ; do
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if [ -x "${full_argv0}-${wx}" ] ; then
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binary="${full_argv0}-${wx}"
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v="x"
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elif [ "${wx}" = "${want_ver}" ] && [ -x "${full_argv0}-${auto_ver}" ] ; then
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binary="${full_argv0}-${auto_ver}"
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v="x"
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fi
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done
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[ "${v}" = "x" ] && break
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done
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fi
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#
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# autodetect helpers
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#
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acprereq_version() {
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sed -n -r \
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-e '/^\s*(#|dnl)/d' \
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-e '/AC_PREREQ/s:.*AC_PREREQ\s*\(\[?\s*([0-9.]+)\s*\]?\):\1:p' \
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"$@" |
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LC_ALL=C sort -n -t . |
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tail -1
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}
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generated_version() {
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local re='^# Generated (by (GNU )?Autoconf|automatically using autoconf version) ([0-9.]+).*'
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sed -n -r "/${re}/{s:${re}:\3:;p;q}" "$@"
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}
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#
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# autodetect routine
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#
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if [ "${WANT_AUTOCONF}" = "2.1" ] && [ -f "configure.ac" ] ; then
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err "Since configure.ac is present, aclocal always use\n" \
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"\tautoconf 2.59+, which conflicts with your choice and\n" \
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"\tcauses error. You have two options:\n" \
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"\t1. Try execute command again after removing configure.ac\n" \
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"\t2. Don't set WANT_AUTOCONF"
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fi
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if [ "${WANT_AUTOCONF:-2.1}" = "2.1" ] && [ -n "${WANT_AUTOMAKE}" ] ; then
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# Automake-1.7 and better require autoconf-2.5x so if WANT_AUTOMAKE
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# is set to an older version, let's do some sanity checks.
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case "${WANT_AUTOMAKE}" in
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1.[456])
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acfiles=$(ls aclocal.m4 acinclude.m4 configure.in configure.ac 2>/dev/null)
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[ -n "${acfiles}" ] && confversion=$(acprereq_version ${acfiles})
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[ -z "${confversion}" ] && [ -r "configure" ] \
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&& confversion=$(generated_version configure)
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if [ "${confversion}" = "2.1" ] && [ ! -f "configure.ac" ] ; then
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binary="${full_argv0}-2.13"
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fi
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esac
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fi
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if [ -n "${WANT_ACWRAPPER_DEBUG}" ] ; then
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if [ -n "${WANT_AUTOCONF}" ] ; then
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warn "DEBUG: WANT_AUTOCONF is set to ${WANT_AUTOCONF}"
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fi
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warn "DEBUG: will execute <${binary}>"
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fi
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#
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# for further consistency
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#
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if [ -z "${WANT_AUTOCONF}" ] ; then
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for v in ${vers} ; do
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auto_ver=${v%:*}
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want_ver=${v#*:}
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if [ "${binary}" = "${full_argv0}-${auto_ver}" ] ; then
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export WANT_AUTOCONF="${want_ver}"
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break
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fi
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done
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fi
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#
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# Now try to run the binary
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#
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if [ ! -x "${binary}" ] ; then
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# this shouldn't happen
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err "${binary} is missing or not executable.\n" \
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"\tPlease try emerging the correct version of autoconf."
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fi
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exec "${binary}" "$@"
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# The shell will error out if `exec` failed.
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