re PR c++/42748 (warnings about 'mangling of 'va_list' has changed in GCC 4.4'…

re PR c++/42748 (warnings about 'mangling of 'va_list' has changed in GCC 4.4' not suppressed in sytem headers)

	PR c++/42748
	* config/arm/arm.c (arm_mangle_type): Do not warn about changes to
	mangling of va_list in system headers.

	PR c++/42748
	* g++.dg/abi/arm_va_list2.C: New test.
	* g++.dg/abi/arm_va_list2.h: Companion header file.

From-SVN: r156202

gcc/ChangeLog

+2010-01-24  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/42748
+	* config/arm/arm.c (arm_mangle_type): Do not warn about changes to
+	mangling of va_list in system headers.
+
 2010-01-23  Toon Moene  <toon@moene.org>
 
 	* tree-predcom.c (combine_chains): Return NULL, not false.

gcc/config/arm/arm.c

@@ -21372,7 +21372,7 @@ arm_mangle_type (const_tree type)
       && lang_hooks.types_compatible_p (CONST_CAST_TREE (type), va_list_type))
     {
       static bool warned;
-      if (!warned && warn_psabi)
+      if (!warned && warn_psabi && !in_system_header)
 	{
 	  warned = true;
 	  inform (input_location,

gcc/testsuite/ChangeLog

+2010-01-24  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/42748
+	* g++.dg/abi/arm_va_list2.C: New test.
+	* g++.dg/abi/arm_va_list2.h: Companion header file.
+
 2010-01-24  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/41044

gcc/testsuite/g++.dg/abi/arm_va_list2.C

+// { dg-do compile }
+// { dg-options "-Wpsabi" }
+// { dg-require-effective-target arm_eabi }
+
+#include <stdarg.h>
+#include "arm_va_list2.h"
+

gcc/testsuite/g++.dg/abi/arm_va_list2.h

+// The mangling of va_list changed in GCC 4.4.  We want to warn about
+// that -- but not in a system header.
+#pragma GCC system_header
+void f(va_list) {}