opts.h (CL_ERR_NEGATIVE): Define.

	* opts.h (CL_ERR_NEGATIVE): Define.
	* opts.c (unknown_option_callback): Don't postpone warnings for
	options marked with CL_ERR_NEGATIVE.
	* opts-common.c (decode_cmdline_option): Set CL_ERR_NEGATIVE error
	for negative versions of CL_REJECT_NEGATIVE options.

testsuite:
	* gcc.dg/opts-1.c: Expect errors, not warnings.

From-SVN: r163637

gcc/ChangeLog

+2010-08-30  Joseph Myers  <joseph@codesourcery.com>
+
+	* opts.h (CL_ERR_NEGATIVE): Define.
+	* opts.c (unknown_option_callback): Don't postpone warnings for
+	options marked with CL_ERR_NEGATIVE.
+	* opts-common.c (decode_cmdline_option): Set CL_ERR_NEGATIVE error
+	for negative versions of CL_REJECT_NEGATIVE options.
+
 2010-08-30  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (zero_extendsidi2_1): Rename from

gcc/opts-common.c

@@ -197,6 +197,7 @@ decode_cmdline_option (const char **argv, unsigned int lang_mask,
   if (!value && (option->flags & CL_REJECT_NEGATIVE))
     {
       opt_index = OPT_SPECIAL_unknown;
+      errors |= CL_ERR_NEGATIVE;
       arg = argv[0];
       goto done;
     }

gcc/opts.c

@@ -482,7 +482,8 @@ unknown_option_callback (const struct cl_decoded_option *decoded)
 {
   const char *opt = decoded->arg;
 
-  if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
+  if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-'
+      && !(decoded->errors & CL_ERR_NEGATIVE))
     {
       /* We don't generate warnings for unknown -Wno-* options unless
 	 we issue diagnostics.  */

gcc/opts.h

@@ -102,6 +102,9 @@ extern const unsigned int cl_lang_count;
 #define CL_ERR_MISSING_ARG	(1 << 1) /* Argument required but missing.  */
 #define CL_ERR_WRONG_LANG	(1 << 2) /* Option for wrong language.  */
 #define CL_ERR_UINT_ARG		(1 << 3) /* Bad unsigned integer argument.  */
+#define CL_ERR_NEGATIVE		(1 << 4) /* Negative form of option
+					    not permitted (together
+					    with OPT_SPECIAL_unknown).  */
 
 /* Structure describing the result of decoding an option.  */
 

gcc/testsuite/ChangeLog

+2010-08-30  Joseph Myers  <joseph@codesourcery.com>
+
+	* gcc.dg/opts-1.c: Expect errors, not warnings.
+
 2010-08-29  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/42769

gcc/testsuite/gcc.dg/opts-1.c

@@ -5,5 +5,5 @@
 /* { dg-error "-fno-abi-version" "-fno-abi-version" { target *-*-* } 0 } */
 /* { dg-error "-fno-lto-compression-level" "-fno-lto-compression-level" { target *-*-* } 0 } */
 /* { dg-error "-fno-tree-parallelize-loops" "-fno-tree-parallelize-loops" { target *-*-* } 0 } */
-/* { dg-warning "-Wno-strict-overflow" "-Wno-strict-overflow" { target *-*-* } 0 } */
-/* { dg-warning "-Wno-strict-aliasing" "-Wno-strict-aliasing" { target *-*-* } 0 } */
+/* { dg-error "-Wno-strict-overflow" "-Wno-strict-overflow" { target *-*-* } 0 } */
+/* { dg-error "-Wno-strict-aliasing" "-Wno-strict-aliasing" { target *-*-* } 0 } */