-#!/bin/sh
-
-echo "Please read INSTALL.BZR for instructions on how to build Emacs from Bazaar."
-
-# Exit with failure, since people may have generic build scripts that
-# try things like "autogen.sh && ./configure && make".
-exit 1
+#!/bin/sh
+### autogen.sh - tool to help build Emacs from a bzr checkout
+
+## Copyright (C) 2011-2014 Free Software Foundation, Inc.
+
+## Author: Glenn Morris <rgm@gnu.org>
+## Maintainer: emacs-devel@gnu.org
+
+## This file is part of GNU Emacs.
+
+## GNU Emacs is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+
+## GNU Emacs is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+
+## You should have received a copy of the GNU General Public License
+## along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+### Commentary:
+
+## The Emacs bzr repository does not include the configure script
+## (and associated helpers). The first time you fetch Emacs from bzr,
+## run this script to generate the necessary files.
+## For more details, see the file INSTALL.REPO.
+
+### Code:
+
+## Tools we need:
+## Note that we respect the values of AUTOCONF etc, like autoreconf does.
+progs="autoconf automake"
+
+## Minimum versions we need:
+autoconf_min=`sed -n 's/^ *AC_PREREQ(\([0-9\.]*\)).*/\1/p' configure.ac`
+
+## This will need improving if more options are ever added to the
+## AM_INIT_AUTOMAKE call.
+automake_min=`sed -n 's/^ *AM_INIT_AUTOMAKE(\([0-9\.]*\)).*/\1/p' configure.ac`
+
+
+## $1 = program, eg "autoconf".
+## Echo the version string, eg "2.59".
+## FIXME does not handle things like "1.4a", but AFAIK those are
+## all old versions, so it is OK to fail there.
+## Also note that we do not handle micro versions.
+get_version ()
+{
+ ## Remove eg "./autogen.sh: line 50: autoconf: command not found".
+ $1 --version 2>&1 | sed -e '/not found/d' -e 's/.* //' -n -e '1 s/\([0-9][0-9\.]*\).*/\1/p'
+}
+
+## $1 = version string, eg "2.59"
+## Echo the major version, eg "2".
+major_version ()
+{
+ echo $1 | sed -e 's/\([0-9][0-9]*\)\..*/\1/'
+}
+
+## $1 = version string, eg "2.59"
+## Echo the minor version, eg "59".
+minor_version ()
+{
+ echo $1 | sed -e 's/[0-9][0-9]*\.\([0-9][0-9]*\).*/\1/'
+}
+
+## $1 = program
+## $2 = minimum version.
+## Return 0 if program is present with version >= minimum version.
+## Return 1 if program is missing.
+## Return 2 if program is present but too old.
+## Return 3 for unexpected error (eg failed to parse version).
+check_version ()
+{
+ ## Respect eg $AUTOMAKE if it is set, like autoreconf does.
+ uprog=`echo $1 | sed -e 's/-/_/g' -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
+
+ eval uprog=\$${uprog}
+
+ [ x"$uprog" = x ] && uprog=$1
+
+ have_version=`get_version $uprog`
+
+ [ x"$have_version" = x ] && return 1
+
+ have_maj=`major_version $have_version`
+ need_maj=`major_version $2`
+
+ [ x"$have_maj" != x ] && [ x"$need_maj" != x ] || return 3
+
+ [ $have_maj -gt $need_maj ] && return 0
+ [ $have_maj -lt $need_maj ] && return 2
+
+ have_min=`minor_version $have_version`
+ need_min=`minor_version $2`
+
+ [ x"$have_min" != x ] && [ x"$need_min" != x ] || return 3
+
+ [ $have_min -ge $need_min ] && return 0
+ return 2
+}
+
+
+cat <<EOF
+Checking whether you have the necessary tools...
+(Read INSTALL.REPO for more details on building Emacs)
+
+EOF
+
+missing=
+
+for prog in $progs; do
+
+ sprog=`echo "$prog" | sed 's/-/_/g'`
+
+ eval min=\$${sprog}_min
+
+ echo "Checking for $prog (need at least version $min)..."
+
+ check_version $prog $min
+
+ retval=$?
+
+ case $retval in
+ 0) stat="ok" ;;
+ 1) stat="missing" ;;
+ 2) stat="too old" ;;
+ *) stat="unable to check" ;;
+ esac
+
+ echo $stat
+
+ if [ $retval -ne 0 ]; then
+ missing="$missing $prog"
+ eval ${sprog}_why=\""$stat"\"
+ fi
+
+done
+
+
+if [ x"$missing" != x ]; then
+
+ cat <<EOF
+
+Building Emacs from Bzr requires the following specialized programs:
+EOF
+
+ for prog in $progs; do
+ sprog=`echo "$prog" | sed 's/-/_/g'`
+
+ eval min=\$${sprog}_min
+
+ echo "$prog (minimum version $min)"
+ done
+
+
+ cat <<EOF
+
+Your system seems to be missing the following tool(s):
+EOF
+
+ for prog in $missing; do
+ sprog=`echo "$prog" | sed 's/-/_/g'`
+
+ eval why=\$${sprog}_why
+
+ echo "$prog ($why)"
+ done
+
+ cat <<EOF
+
+If you think you have the required tools, please add them to your PATH
+and re-run this script.
+
+Otherwise, please try installing them.
+On systems using rpm and yum, try: "yum install PACKAGE"
+On systems using dpkg and apt, try: "apt-get install PACKAGE"
+Then re-run this script.
+
+If you do not have permission to do this, or if the version provided
+by your system is too old, it is normally straightforward to build
+these packages from source. You can find the sources at:
+
+ftp://ftp.gnu.org/gnu/PACKAGE/
+
+Download the package (make sure you get at least the minimum version
+listed above), extract it using tar, then run configure, make,
+make install. Add the installation directory to your PATH and re-run
+this script.
+
+If you know that the required versions are in your PATH, but this
+script has made an error, then you can simply run
+
+autoreconf -fi -I m4
+
+instead of this script.
+
+Please report any problems with this script to bug-gnu-emacs@gnu.org .
+EOF
+
+ exit 1
+fi
+
+echo 'Your system has the required tools.'
+echo "Running 'autoreconf -fi -I m4' ..."
+
+
+## Let autoreconf figure out what, if anything, needs doing.
+## Use autoreconf's -f option in case autoreconf itself has changed.
+autoreconf -fi -I m4 || exit $?
+
+## Create a timestamp, so that './autogen.sh; make' doesn't
+## cause 'make' to needlessly run 'autoheader'.
+echo timestamp > src/stamp-h.in || exit
+
+echo "You can now run './configure'."
+
+exit 0
+
+### autogen.sh ends here
HCoop / bpt / emacs.git / blobdiff