#! /bin/sh
# Copyright (C) 2008-2012 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/>.

# AM_DEFAULT_SOURCE_EXT

required='cc c++'
. ./defs || exit 1

cat >> configure.ac << 'END'
AC_PROG_CC
AC_PROG_CXX
AC_CONFIG_FILES([sub/Makefile sub2/Makefile])
AM_CONDITIONAL([COND], [:])
AC_OUTPUT
END

mkdir sub sub2

cat > Makefile.am << 'END'
SUBDIRS = sub sub2
bin_PROGRAMS = foo
END

cat > sub/Makefile.am << 'END'
bin_PROGRAMS = bar baz
AM_DEFAULT_SOURCE_EXT = .cpp
END

cat > sub2/Makefile.am << 'END'
bin_PROGRAMS = bla
if COND
AM_DEFAULT_SOURCE_EXT = .c .quux
endif
%.c: %.foo
	cat $< >$@
EXTRA_DIST = $(addsuffix .foo,$(bin_PROGRAMS))
CLEANFILES = $(addsuffix .c,$(bin_PROGRAMS))
END

cat > foo.c << 'END'
/* Valid C, invalid C++. */
int main (void)
{
  int new = 0;
  return new;
}
END
cp foo.c sub2/bla.foo

cat > sub/bar.cpp << 'END'
/* Valid C++, invalid C. */
using namespace std;
int main (void)
{
  return 0;
}
END
cp sub/bar.cpp sub/baz.cpp

$ACLOCAL
$AUTOCONF

# Conditional AM_DEFAULT_SOURCE_EXT does not work yet  :-(
# (this limitation could be lifted).
AUTOMAKE_fails --add-missing
grep 'AM_DEFAULT_SOURCE_EXT.*defined conditionally' stderr

sed '/^if/d; /^endif/d' sub2/Makefile.am > t
mv -f t sub2/Makefile.am

# AM_DEFAULT_SOURCE_EXT can only assume one value
# (lifting this limitation is not such a good idea).
AUTOMAKE_fails --add-missing
grep 'AM_DEFAULT_SOURCE_EXT.*at most one value' stderr

sed 's/ \.quux//' sub2/Makefile.am > t
mv -f t sub2/Makefile.am

$AUTOMAKE --add-missing

./configure
$MAKE
$MAKE distcheck

: