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

	PR 42965
	* diagnostic.c (diagnostic_initialize): Initialize
	some_warnings_are_errors.
	(diagnostic_finish): New.
	(diagnostic_action_after_output): Call it before exiting.
	(diagnostic_report_diagnostic): Do not print message here. Set
	some_warnings_are_errors.
	* diagnostic.h (diagnostic_context): Delete
	issue_warnings_are_errors_message. Add some_warnings_are_errors.
	(diagnostic_finish): Declare.
	* toplev.c (toplev_main): Call it before exit.
testsuite/
	* gcc.dg/Werror-6.c: Adjust.
	* gcc.dg/Werror-implicit-function-declaration.c: Likewise.
	* gcc.dg/Werror-4.c: Likewise.
	* gcc.dg/Wdeclaration-after-statement-3.c: Likewise.
	* gcc.dg/Wswitch-enum-error.c: Likewise.
	* gcc.dg/Wpointer-arith.c: Likewise.
	* gcc.dg/Wfatal.c: Likewise.
	* gcc.dg/Wswitch-error.c: Likewise.
	* g++.dg/warn/unused-result1-Werror.c: Likewise.
	* gcc.dg/Werror-9.c: Delete. Duplicate of Werror-4.c.
	* gcc.dg/cpp/warn-undef-2.c: Likewise.
	* gcc.dg/cpp/warn-traditional-2.c: Likewise.
	* gcc.dg/cpp/warn-comments-2.c: Likewise.
	* gcc.dg/cpp/warn-variadic-2.c: Likewise.
	* gcc.dg/cpp/warning-directive-2.c: Likewise.
	* gcc.dg/cpp/warn-long-long-2.c: Likewise.
	* gcc.dg/cpp/warn-deprecated-2.c: Likewise.
	* gcc.dg/cpp/warn-multichar-2.c: Likewise.
	* gcc.dg/cpp/warn-normalized-3.c: Likewise.
	* gcc.dg/cpp/warn-cxx-compat-2.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-3.c: Likewise.
	* gcc.dg/cpp/warn-unused-macros-2.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-4.c: Likewise.
	* gcc.dg/cpp/warn-redefined-2.c: Likewise.
	* g++.dg/cpp/warning-directive-2.C: Likewise.
	* gfortran.dg/warning-directive-2.F90: Likewise.


git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@158168 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 33 insertions, 15 deletions

diff --git a/gcc/diagnostic.c b/gcc/diagnostic.c
index 791deacd636..5df458b465e 100644
--- a/gcc/diagnostic.c
+++ b/gcc/diagnostic.c
@@ -97,7 +97,7 @@ diagnostic_initialize (diagnostic_context *context)
   context->printer->wrapping.rule = DIAGNOSTICS_SHOW_PREFIX_ONCE;
 
   memset (context->diagnostic_count, 0, sizeof context->diagnostic_count);
-  context->issue_warnings_are_errors_message = true;
+  context->some_warnings_are_errors = false;
   context->warning_as_error_requested = false;
   memset (context->classify_diagnostic, DK_UNSPECIFIED,
 	  sizeof context->classify_diagnostic);
@@ -112,6 +112,28 @@ diagnostic_initialize (diagnostic_context *context)
   context->inhibit_notes_p = false;
 }
 
+/* Do any cleaning up required after the last diagnostic is emitted.  */
+
+void
+diagnostic_finish (diagnostic_context *context)
+{
+  /* Some of the errors may actually have been warnings.  */
+  if (context->some_warnings_are_errors)
+    {
+      /* -Werror was given.  */
+      if (context->warning_as_error_requested)
+	pp_verbatim (context->printer,
+		     _("%s: all warnings being treated as errors\n"),
+		     progname);
+      /* At least one -Werror= was given.  */
+      else
+	pp_verbatim (context->printer,
+		     _("%s: some warnings being treated as errors\n"),
+		     progname);
+      pp_flush (context->printer);
+    }
+}
+
 /* Initialize DIAGNOSTIC, where the message MSG has already been
    translated.  */
 void
@@ -184,6 +206,7 @@ diagnostic_action_after_output (diagnostic_context *context,
       if (flag_fatal_errors)
 	{
 	  fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n");
+	  diagnostic_finish (context);
 	  exit (FATAL_EXIT_CODE);
 	}
       break;
@@ -200,7 +223,7 @@ diagnostic_action_after_output (diagnostic_context *context,
     case DK_FATAL:
       if (context->abort_on_error)
 	real_abort ();
-
+      diagnostic_finish (context);
       fnotice (stderr, "compilation terminated.\n");
       exit (FATAL_EXIT_CODE);
 
@@ -309,7 +332,7 @@ diagnostic_report_diagnostic (diagnostic_context *context,
 			      diagnostic_info *diagnostic)
 {
   location_t location = diagnostic->location;
-  bool maybe_print_warnings_as_errors_message = false;
+  diagnostic_t orig_diag_kind = diagnostic->kind;
   const char *saved_format_spec;
 
   /* Give preference to being able to inhibit warnings, before they
@@ -319,7 +342,11 @@ diagnostic_report_diagnostic (diagnostic_context *context,
     return false;
 
   if (diagnostic->kind == DK_PEDWARN)
-    diagnostic->kind = pedantic_warning_kind ();
+    {
+      diagnostic->kind = pedantic_warning_kind ();
+      /* We do this to avoid giving the message for -pedantic-errors.  */
+      orig_diag_kind = diagnostic->kind;
+    }
  
   if (diagnostic->kind == DK_NOTE && context->inhibit_notes_p)
     return false;
@@ -343,7 +370,6 @@ diagnostic_report_diagnostic (diagnostic_context *context,
       && diagnostic->kind == DK_WARNING)
     {
       diagnostic->kind = DK_ERROR;
-      maybe_print_warnings_as_errors_message = true;
     }
 
   if (diagnostic->option_index)
@@ -357,7 +383,6 @@ diagnostic_report_diagnostic (diagnostic_context *context,
       if (context->classify_diagnostic[diagnostic->option_index] != DK_UNSPECIFIED)
 	{
 	  diagnostic->kind = context->classify_diagnostic[diagnostic->option_index];
-	  maybe_print_warnings_as_errors_message = false;
 	}
       /* This allows for future extensions, like temporarily disabling
 	 warnings for ranges of source code.  */
@@ -365,15 +390,8 @@ diagnostic_report_diagnostic (diagnostic_context *context,
 	return false;
     }
 
-  /* If we changed the kind due to -Werror, and didn't override it, we
-     need to print this message.  */
-  if (context->issue_warnings_are_errors_message
-      && maybe_print_warnings_as_errors_message)
-    {
-      pp_verbatim (context->printer,
-		   "%s: warnings being treated as errors\n", progname);
-      context->issue_warnings_are_errors_message = false;
-    }
+  if (orig_diag_kind == DK_WARNING && diagnostic->kind == DK_ERROR)
+    context->some_warnings_are_errors = true;
 
   context->lock++;