mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-09-01 17:31:53 +00:00
Problem reported by Gerd Möllmann (Bug#68464). * .gitignore: Ignore files in exec that are now copied from build-aux. * admin/merge-gnulib (avoided_flags): Instead of clearing autom4te.cache here ... * autogen.sh (do_git): ... clear it here. Use config.guess, config.sub and install-sh from the Emacs repository, as they are more likely to be up to date. This avoids unnecessary differences among different builders, and avoids unnecessary ‘git diff’ output after autogen.sh. Also, copy these files from build-aux to exec since there should be no difference between the two copies. * exec/config.guess, exec/config.sub, exec/install-sh: Remove from repository, as autogen.sh now copies them from build-aux.
436 lines
12 KiB
Bash
Executable file
436 lines
12 KiB
Bash
Executable file
#!/bin/sh
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### autogen.sh - tool to help build Emacs from a repository checkout
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## Copyright (C) 2011-2024 Free Software Foundation, Inc.
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## Author: Glenn Morris <rgm@gnu.org>
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## Maintainer: emacs-devel@gnu.org
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## This file is part of GNU Emacs.
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## GNU Emacs is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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## GNU Emacs is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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## You should have received a copy of the GNU General Public License
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## along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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### Commentary:
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## The Emacs repository does not include the configure script (and
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## associated helpers). The first time you fetch Emacs from the repo,
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## run this script to generate the necessary files.
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## For more details, see the file INSTALL.REPO.
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### Code:
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## Tools we need:
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## Note that we respect the values of AUTOCONF etc, like autoreconf does.
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progs="autoconf"
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## Minimum versions we need:
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autoconf_min=`sed -n 's/^ *AC_PREREQ(\[\([0-9\.]*\)]).*/\1/p' configure.ac`
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## $1 = program, eg "autoconf".
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## Echo the version string, eg "2.59".
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## FIXME does not handle things like "1.4a", but AFAIK those are
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## all old versions, so it is OK to fail there.
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## Also note that we do not handle micro versions.
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get_version ()
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{
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vers=`($1 --version) 2> /dev/null` && expr "$vers" : '[^
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]* \([0-9][0-9.]*\).*'
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}
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## $1 = version string, eg "2.59"
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## Echo the major version, eg "2".
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major_version ()
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{
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echo $1 | sed -e 's/\([0-9][0-9]*\)\..*/\1/'
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}
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## $1 = version string, eg "2.59"
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## Echo the minor version, eg "59".
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minor_version ()
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{
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echo $1 | sed -e 's/[0-9][0-9]*\.\([0-9][0-9]*\).*/\1/'
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}
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## $1 = program
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## $2 = minimum version.
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## Return 0 if program is present with version >= minimum version.
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## Return 1 if program is missing.
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## Return 2 if program is present but too old.
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## Return 3 for unexpected error (eg failed to parse version).
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check_version ()
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{
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## Respect, e.g., $AUTOCONF if it is set, like autoreconf does.
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uprog0=`echo $1 | sed -e 's/-/_/g' -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
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eval uprog=\$${uprog0}
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if [ x"$uprog" = x ]; then
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uprog=$1
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else
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printf '%s' "(using $uprog0=$uprog) "
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fi
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## /bin/sh should always define the "command" builtin, but
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## sometimes it does not on hydra.nixos.org.
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## /bin/sh = "BusyBox v1.27.2", "built-in shell (ash)".
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## It seems to be an optional compile-time feature in that shell:
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## see ASH_CMDCMD in <https://git.busybox.net/busybox/tree/shell/ash.c>.
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if command -v command > /dev/null 2>&1; then
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command -v $uprog > /dev/null || return 1
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else
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$uprog --version > /dev/null 2>&1 || return 1
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fi
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have_version=`get_version $uprog` || return 4
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have_maj=`major_version $have_version`
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need_maj=`major_version $2`
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[ x"$have_maj" != x ] && [ x"$need_maj" != x ] || return 3
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[ $have_maj -gt $need_maj ] && return 0
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[ $have_maj -lt $need_maj ] && return 2
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have_min=`minor_version $have_version`
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need_min=`minor_version $2`
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[ x"$have_min" != x ] && [ x"$need_min" != x ] || return 3
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[ $have_min -ge $need_min ] && return 0
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return 2
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}
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do_check=true
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do_autoconf=false
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do_git=false
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for arg; do
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case $arg in
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--help)
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exec echo "$0: usage: $0 [--no-check] [target...]
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Targets are: all autoconf git";;
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--no-check)
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do_check=false;;
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all)
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do_autoconf=true
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test -r .git && do_git=true;;
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autoconf)
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do_autoconf=true;;
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git)
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do_git=true;;
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*)
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echo >&2 "$0: $arg: unknown argument"; exit 1;;
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esac
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done
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case $do_autoconf,$do_git in
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false,false)
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do_autoconf=true
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test -r .git && do_git=true;;
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esac
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# Generate Autoconf-related files, if requested.
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if $do_autoconf; then
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if $do_check; then
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echo 'Checking whether you have the necessary tools...
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(Read INSTALL.REPO for more details on building Emacs)'
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missing=
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for prog in $progs; do
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sprog=`echo "$prog" | sed 's/-/_/g'`
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eval min=\$${sprog}_min
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printf '%s' "Checking for $prog (need at least version $min) ... "
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check_version $prog $min
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retval=$?
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case $retval in
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0) stat="ok" ;;
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1) stat="missing" ;;
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2) stat="too old" ;;
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4) stat="broken?" ;;
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*) stat="unable to check" ;;
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esac
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echo $stat
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if [ $retval -ne 0 ]; then
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missing="$missing $prog"
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eval ${sprog}_why=\""$stat"\"
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fi
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done
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if [ x"$missing" != x ]; then
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echo '
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Building Emacs from the repository requires the following specialized programs:'
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for prog in $progs; do
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sprog=`echo "$prog" | sed 's/-/_/g'`
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eval min=\$${sprog}_min
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echo "$prog (minimum version $min)"
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done
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echo '
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Your system seems to be missing the following tool(s):'
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for prog in $missing; do
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sprog=`echo "$prog" | sed 's/-/_/g'`
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eval why=\$${sprog}_why
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echo "$prog ($why)"
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done
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echo '
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If you think you have the required tools, please add them to your PATH
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and re-run this script.
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Otherwise, please try installing them.
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On systems using rpm and yum, try: "yum install PACKAGE"
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On systems using dpkg and apt, try: "apt-get install PACKAGE"
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Then re-run this script.
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If you do not have permission to do this, or if the version provided
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by your system is too old, it is normally straightforward to build
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these packages from source. You can find the sources at:
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https://ftp.gnu.org/gnu/PACKAGE/
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Download the package (make sure you get at least the minimum version
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listed above), extract it using tar, then run configure, make,
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make install. Add the installation directory to your PATH and re-run
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this script.
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If you know that the required versions are in your PATH, but this
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script has made an error, then you can simply re-run this script with
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the --no-check option.
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Please report any problems with this script to bug-gnu-emacs@gnu.org .'
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exit 1
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fi
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echo 'Your system has the required tools.'
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fi # do_check
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# Stale caches can confuse autoconf.
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rm -fr autom4te.cache exec/autom4te.cache || exit
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# In build-aux save config.guess, config.sub and install-sh
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# in case autoreconf overwrites them, as we rely on the copies
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# in Git, which are updated by admin/merge-gnulib.
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for file in config.guess config.sub install-sh; do
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cp -p build-aux/$file build-aux/$file.tmp || exit
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done
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# Build aclocal.m4 here so that autoreconf need not use aclocal.
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# aclocal is part of Automake and might not be installed, and
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# autoreconf skips aclocal if aclocal.m4 is already supplied.
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ls m4/*.m4 | LC_ALL=C sort | sed 's,.*\.m4$,m4_include([&]),' \
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> aclocal.m4.tmp || exit
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if cmp -s aclocal.m4.tmp aclocal.m4; then
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rm -f aclocal.m4.tmp
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else
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echo "Building aclocal.m4 ..."
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mv aclocal.m4.tmp aclocal.m4
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fi || exit
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echo "Running 'autoreconf -fi -I m4' ..."
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## Let autoreconf figure out what, if anything, needs doing.
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## Use autoreconf's -f option in case autoreconf itself has changed.
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autoreconf -fi -I m4 || exit
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echo "Building 'aclocal.m4' in exec ..."
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# Create a placeholder aclocal.m4 in exec, preventing autoreconf
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# from running aclocal.
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echo "" > exec/aclocal.m4
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echo "Running 'autoreconf -fi' in exec ..."
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# Now, run autoreconf inside the exec directory to generate its
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# configure script.
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autoreconf -fi exec || exit
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# Restore config.guess etc. in build-aux, and copy them to exec.
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for file in config.guess config.sub install-sh; do
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cp build-aux/$file.tmp exec/$file &&
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mv build-aux/$file.tmp build-aux/$file || exit
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done
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fi
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# True if the Git setup was OK before autogen.sh was run.
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git_was_ok=true
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if $do_git; then
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case `cp --help 2>/dev/null` in
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*--backup*--verbose*)
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cp_options='--backup=numbered --verbose';;
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*)
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cp_options='-f';;
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esac
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fi
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# Like 'git config NAME VALUE' but verbose on change and exiting on failure.
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# Also, do not configure unless requested.
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git_config ()
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{
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$do_git || return
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name=$1
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value=$2
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ovalue=`git config --get "$name"` && test "$ovalue" = "$value" || {
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if $git_was_ok; then
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echo 'Configuring local git repository...'
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case $cp_options in
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--backup=*)
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config=$git_common_dir/config
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cp $cp_options --force -- "$config" "$config" || exit;;
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esac
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fi
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echo "git config $name '$value'"
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git config "$name" "$value" || exit
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git_was_ok=false
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}
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}
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## Configure Git, if requested.
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# Get location of Git's common configuration directory. For older Git
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# versions this is just '.git'. Newer Git versions support worktrees.
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{ test -r .git &&
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git_common_dir=`git rev-parse --no-flags --git-common-dir 2>/dev/null` &&
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test -n "$git_common_dir"
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} || git_common_dir=.git
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hooks=$git_common_dir/hooks
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# Check hashes when transferring objects among repositories.
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git_config transfer.fsckObjects true
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# Configure 'git diff' hunk header format.
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# This xfuncname is based on Git's built-in 'cpp' pattern.
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# The first line rejects jump targets and access declarations.
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# The second line matches top-level functions and methods.
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# The third line matches preprocessor and DEFUN macros.
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git_config diff.cpp.xfuncname \
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'!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])
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^((::[[:space:]]*)?[A-Za-z_][A-Za-z_0-9]*[[:space:]]*\(.*)$
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^((#define[[:space:]]|DEFUN).*)$'
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git_config diff.elisp.xfuncname \
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'^\([^[:space:]]*def[^[:space:]]+[[:space:]]+([^()[:space:]]+)'
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git_config 'diff.m4.xfuncname' '^((m4_)?define|A._DEFUN(_ONCE)?)\([^),]*'
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git_config 'diff.make.xfuncname' \
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'^([$.[:alnum:]_].*:|[[:alnum:]_]+[[:space:]]*([*:+]?[:?]?|!?)=|define .*)'
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git_config 'diff.shell.xfuncname' \
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'^([[:space:]]*[[:alpha:]_][[:alnum:]_]*[[:space:]]*\(\)|[[:alpha:]_][[:alnum:]_]*=)'
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git_config diff.texinfo.xfuncname \
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'^@node[[:space:]]+([^,[:space:]][^,]+)'
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# Install Git hooks.
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tailored_hooks=
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sample_hooks=
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for hook in commit-msg pre-commit prepare-commit-msg post-commit \
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pre-push commit-msg-files.awk; do
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cmp -- build-aux/git-hooks/$hook "$hooks/$hook" >/dev/null 2>&1 ||
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tailored_hooks="$tailored_hooks $hook"
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done
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git_sample_hook_src ()
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{
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hook=$1
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src=$hooks/$hook.sample
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if test ! -r "$src"; then
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case $hook in
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applypatch-msg) src=build-aux/git-hooks/commit-msg;;
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pre-applypatch) src=build-aux/git-hooks/pre-commit;;
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esac
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fi
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}
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for hook in applypatch-msg pre-applypatch; do
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git_sample_hook_src $hook
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cmp -- "$src" "$hooks/$hook" >/dev/null 2>&1 ||
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sample_hooks="$sample_hooks $hook"
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done
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if test -n "$tailored_hooks$sample_hooks"; then
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if $do_git; then
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echo "Installing git hooks..."
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if test ! -d "$hooks"; then
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printf "mkdir -p -- '%s'\\n" "$hooks"
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mkdir -p -- "$hooks" || exit
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fi
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if test -n "$tailored_hooks"; then
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for hook in $tailored_hooks; do
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dst=$hooks/$hook
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cp $cp_options -- build-aux/git-hooks/$hook "$dst" || exit
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chmod -- a-w "$dst" || exit
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done
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fi
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if test -n "$sample_hooks"; then
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for hook in $sample_hooks; do
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git_sample_hook_src $hook
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dst=$hooks/$hook
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cp $cp_options -- "$src" "$dst" || exit
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chmod -- a-w "$dst" || exit
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done
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fi
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else
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git_was_ok=false
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fi
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fi
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if test ! -f configure; then
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echo "You can now run '$0 autoconf'."
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elif test -r .git && test $git_was_ok = false && test $do_git = false; then
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echo "You can now run '$0 git'."
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elif test ! -f config.status ||
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test -n "`find configure src/config.in -newer config.status`"; then
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echo "You can now run './configure'."
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fi
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exit 0
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### autogen.sh ends here
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