#! /bin/sh
# Copyright (C) 2008, 2010, 2011 Free Software Foundation, Inc.
#
# This program 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 2, or (at your option)
# any later version.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

# Make sure autoconf version checks in aclocal.m4 are robust.

. ./defs || Exit 1

{
  echo 'm4_define([AC_AUTOCONF_VERSION], [9999a])'
  echo 'dnl!! m4_define([a], [oops])'
  cat configure.in
  echo AC_OUTPUT
} >configure.ac
rm -f configure.in

touch Makefile.am

$ACLOCAL
$AUTOCONF 2>stderr || { cat stderr >&2; Exit 1; }
cat stderr >&2
grep 'You have another version of autoconf' stderr
grep 'aclocal.m4:.*this file was generated for' stderr
$AUTOMAKE
./configure
$MAKE

sed 's/^dnl!! //' < configure.ac > configure.tmp
cmp configure.ac configure.tmp && fatal_ 'failed to edit configure.ac'
mv -f configure.tmp configure.ac

$MAKE 2>stderr || { cat stderr >&2; Exit 1; }
cat stderr >&2
grep 'You have another version of autoconf' stderr
grep 'aclocal.m4:.*this file was generated for autoconf 9999a' stderr

: