# Handle $local:$input syntax.
my ($local, @rest) = split (/:/);
@rest = ("$local.in",) unless @rest;
- msg ('portability', $where,
- "Omit leading `./' from config file names such as `$local',"
- . "\nas not all make implementations treat `file' and `./file' equally.")
- if ($local =~ /^\.\//);
+ # Keep in sync with 'conffile-leading-dot.test'.
+ msg ('unsupported', $where,
+ "omit leading './' from config file names such as '$local';"
+ . "\nremake rules might be subtly broken otherwise")
+ if ($local =~ /^\.\//);
my $input = locate_am @rest;
if ($input)
{
--- /dev/null
+#! /bin/sh
+# Copyright (C) 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/>.
+
+# Automake must complain if AC_CONFIG_FILES is passed something starting
+# with a dot (like "./Makefile"), since the remake rules might be subtly
+# broken in that case.
+
+required=GNUmake
+. ./defs || Exit 1
+
+set -e
+
+cat > configure.in << END
+AC_INIT([$me], [1.0])
+AM_INIT_AUTOMAKE
+AC_CONFIG_FILES([./Makefile])
+AC_CONFIG_FILES([./foo:a.in:b.in:c.in])
+AC_OUTPUT
+END
+
+echo foo = barbarbar > Makefile.am
+
+touch a.in b.in c.in
+
+$ACLOCAL
+
+AUTOMAKE_fails -Wnone -Wunsupported
+grep "^configure\.in:3:.*'\\./Makefile'" stderr
+grep "^configure\.in:3:.* omit leading '\\./'" stderr
+grep "^configure\.in:3:.*remake rules might be subtly broken" stderr
+grep "^configure\.in:4:.*'\\./foo'" stderr
+grep "^configure\.in:4:.* omit leading '\\./'" stderr
+grep "^configure\.in:4:.*remake rules might be subtly broken" stderr
+
+# Check that our warning was actually justified.
+$AUTOCONF
+$AUTOMAKE -Wall -Wno-unsupported
+./configure
+$MAKE
+grep barbarbar Makefile
+# No need to sleep here, configure did that for us already.
+echo foo = bazbazbaz > Makefile.am
+# Check that remake rules do truly break -- otherwise automake is
+# giving a bogus warning.
+$MAKE 2>stderr && { cat stderr >&2 Exit 1; }
+cat stderr >&2
+grep "config\\.status:.*invalid argument.*[\`\"']Makefile[\`\"']" stderr
+
+: