Fix -MM -MG bug.

PR preprocessor/15220
* gcc.misc-tests/mg-2.c, gcc.misc-tests/mg-2.exp: New.

From-SVN: r105761

gcc/testsuite/ChangeLog

+2005-10-21  James E Wilson  <wilson@specifix.com>
+
+	PR preprocessor/15220
+	* gcc.misc-tests/mg-2.c, gcc.misc-tests/mg-2.exp: New.
+
 2005-10-21  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.c-torture/execute/20051021-1.c: New test.

gcc/testsuite/gcc.misc-tests/mg-2.c

+/* PR 15220 */
+
+#include <nonexist0.h>
+#include "nonexist.h"
+int
+main ()
+{
+  return 0;
+}

gcc/testsuite/gcc.misc-tests/mg-2.exp

+#   Copyright (C) 2005 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 of the License, 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  
+
+# Test the -MG flag with a system header file.
+
+load_lib mike-gcc.exp
+
+prebase
+set actions none-of-the-above
+set compiler_output "mg-2.o ?: .*mg-2.c \[ \\\\\n\]*nonexist.h"
+postbase mg-2.c "" "" "-MM -MG"