re PR other/28322 (GCC new warnings and compatibility)

2008-03-04  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR 28322
	* opts.c (handle_option): Postpone 'unknown option' errors only for
	warning options.
testsuite/
	* gcc.dg/pr28322-3.c: New.

From-SVN: r132870

gcc/ChangeLog

+2008-03-04  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
+
+	PR 28322
+	* opts.c (handle_option): Postpone 'unknown option' errors only for
+	warning options.
+
 2008-03-04  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/35453

gcc/opts.c

@@ -505,7 +505,7 @@ handle_option (const char **argv, unsigned int lang_mask)
       opt = dup;
       value = 0;
       opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
-      if (opt_index == cl_options_count)
+      if (opt_index == cl_options_count && opt[1] == 'W')
 	{
 	  /* We don't generate errors for unknown -Wno-* options
              unless we issue diagnostics.  */

gcc/testsuite/ChangeLog

+2008-03-04  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
+
+	PR 28322
+	* gcc.dg/pr28322-3.c: New.
+
 2008-03-04  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/35453

gcc/testsuite/gcc.dg/pr28322-3.c

+/* PR28322: ignore unknown -Wno-* if no warning is emitted.  */
+/* { dg-do compile } */
+/* { dg-options " -fno-foobar -mno-foobar" } */
+
+void foo(void)
+{
+  int i =  1;
+}
+/* { dg-message "unrecognized command line option .-fno-foobar." "" { target *-*-* } 0 } */
+/* { dg-message "unrecognized command line option .-mno-foobar." "" { target *-*-* } 0 } */