2010-01-20 Janis Johnson <janis187@us.ibm.com>

	    Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/21769
	* testsuite/lib/dg-options.exp (add_options_for_no_pch): Add.
	* testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc:
	Use it.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@156075 138bc75d-0d04-0410-961f-82ee72b054a4

libstdc++-v3/ChangeLog

+2010-01-20  Janis Johnson  <janis187@us.ibm.com>
+	    Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/21769
+	* testsuite/lib/dg-options.exp (add_options_for_no_pch): Add.
+	* testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc:
+	Use it.
+
 2010-01-19  Johannes Singler  <singler@kit.edu>
 
 	PR libstdc++/42712

libstdc++-v3/testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc

 // 2001-04-06 gdr
 
-// Copyright (C) 2001, 2005, 2009 Free Software Foundation, Inc.
+// Copyright (C) 2001, 2005, 2009, 2010 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -17,8 +17,9 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-
 // { dg-do compile }
+// { dg-add-options no_pch }
+
 // { dg-xfail-if "" { { *-*-linux* *-*-darwin[3-9]* } || { uclibc || newlib } } { "*" } { "" } }
 // { dg-excess-errors "" { target { { *-*-linux* *-*-darwin[3-9]* } || { uclibc || newlib } } } }
 

libstdc++-v3/testsuite/lib/dg-options.exp

 # Handlers for additional dg-xxx keywords in tests.
 
-# Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
+# Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
 # Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
@@ -151,3 +151,8 @@ proc dg-require-binary-io { args } {
     }
     return
 }
+
+proc add_options_for_no_pch { flags } {
+    # This forces any generated and possibly included PCH to be invalid.
+    return "-D__GLIBCXX__=99999999"
+}