mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-22 07:09:54 +00:00
277 lines
7.1 KiB
Bash
Executable File
277 lines
7.1 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) 2011-2017 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 <http://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 automake"
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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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## This will need improving if more options are ever added to the
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## AM_INIT_AUTOMAKE call.
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automake_min=`sed -n 's/^ *AM_INIT_AUTOMAKE(\([0-9\.]*\)).*/\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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## Remove eg "./autogen.sh: line 50: autoconf: command not found".
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$1 --version 2>&1 | sed -e '/not found/d' -e 's/.* //' -n -e '1 s/\([0-9][0-9\.]*\).*/\1/p'
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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 eg $AUTOMAKE if it is set, like autoreconf does.
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uprog=`echo $1 | sed -e 's/-/_/g' -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
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eval uprog=\$${uprog}
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[ x"$uprog" = x ] && uprog=$1
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have_version=`get_version $uprog`
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[ x"$have_version" = x ] && return 1
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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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cat <<EOF
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Checking whether you have the necessary tools...
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(Read INSTALL.REPO for more details on building Emacs)
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EOF
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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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echo "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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*) 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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cat <<EOF
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Building Emacs from the repository requires the following specialized programs:
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EOF
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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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cat <<EOF
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Your system seems to be missing the following tool(s):
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EOF
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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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cat <<EOF
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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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ftp://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 run
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autoreconf -fi -I m4
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instead of this script.
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Please report any problems with this script to bug-gnu-emacs@gnu.org .
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EOF
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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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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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## Create a timestamp, so that './autogen.sh; make' doesn't
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## cause 'make' to needlessly run 'autoheader'.
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echo timestamp > src/stamp-h.in || exit
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## Configure Git, if using Git.
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if test -d .git && (git status -s) >/dev/null 2>&1; then
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# Configure 'git diff' hunk header format.
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git config 'diff.elisp.xfuncname' \
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'^\(def[^[:space:]]+[[:space:]]+([^()[:space:]]+)' || exit
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git config 'diff.texinfo.xfuncname' \
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'^@node[[:space:]]+([^,[:space:]][^,]+)' || exit
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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; do
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cmp build-aux/git-hooks/$hook .git/hooks/$hook >/dev/null 2>&1 ||
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tailored_hooks="$tailored_hooks $hook"
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done
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for hook in applypatch-msg pre-applypatch; do
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test ! -r .git/hooks/$hook.sample ||
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cmp .git/hooks/$hook.sample .git/hooks/$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$sample_hooks"; then
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echo "Installing git hooks..."
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case `cp --help 2>/dev/null` in
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*--backup*--verbose*)
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cp_options='--backup=numbered --verbose';;
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*)
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cp_options='-f';;
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esac
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if test -n "$tailored_hooks"; then
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for hook in $tailored_hooks; do
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cp $cp_options build-aux/git-hooks/$hook .git/hooks || exit
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chmod a-w .git/hooks/$hook || exit
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done
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fi
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if test -n "$sample_hooks"; then
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for hook in $sample_hooks; do
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cp $cp_options .git/hooks/$hook.sample .git/hooks/$hook || exit
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chmod a-w .git/hooks/$hook || exit
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done
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fi
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fi
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fi
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echo "You can now run './configure'."
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exit 0
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### autogen.sh ends here
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