re PR preprocessor/43195 (#pragma once and -H)

2010-04-09  Manuel López-Ibáñez <manu@gcc.gnu.org>

	PR cpp/43195
libcpp/
	* files.c (report_missing_guard): Test for #pragma once.
testsuite/
	* gcc.dg/cpp/pr43195.c: New.
	* gcc.dg/cpp/pr43195.h: New.

From-SVN: r158169

gcc/testsuite/ChangeLog

+2010-04-09  Manuel López-Ibáñez <manu@gcc.gnu.org>
+
+	PR cpp/43195
+	* gcc.dg/cpp/pr43195.c: New.
+	* gcc.dg/cpp/pr43195.h: New.
+
 2010-04-09  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR 42965

gcc/testsuite/gcc.dg/cpp/pr43195.c

+/* PR preprocessor/43195 */
+/* { dg-do preprocess } */
+/* { dg-options "-H" } */
+/* { dg-message "pr43195\.h\n" "" { target *-*-* } 0 } */
+#include "pr43195.h"
+

gcc/testsuite/gcc.dg/cpp/pr43195.h

+#pragma once

libcpp/ChangeLog

+2010-04-09  Manuel López-Ibáñez <manu@gcc.gnu.org>
+
+	PR cpp/43195
+	* files.c (report_missing_guard): Test for #pragma once.
+
 2010-04-07  Simon Baldwin  <simonb@google.com>
 
 	* directives.c (do_diagnostic): Add warning reason argument,

libcpp/files.c

@@ -1261,7 +1261,8 @@ report_missing_guard (void **slot, void *d)
       _cpp_file *file = entry->u.file;
 
       /* We don't want MI guard advice for the main file.  */
-      if (file->cmacro == NULL && file->stack_count == 1 && !file->main_file)
+      if (!file->once_only && file->cmacro == NULL
+	  && file->stack_count == 1 && !file->main_file)
 	{
 	  if (data->paths == NULL)
 	    {