re PR other/42966 (add some indication that a warning has been converted to an error)

2010-04-14  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR 42966
	* diagnostics.c (diagnostic_report_diagnostic): Mark specially
	warnings converted to errors.
	
testsuite/	
	* gcc.dg/cpp/warn-undef-2.c: Update.
	* gcc.dg/cpp/warn-traditional-2.c: Update.
	* gcc.dg/cpp/warn-comments-2.c: Update.
	* gcc.dg/cpp/warn-variadic-2.c: Update.
	* gcc.dg/cpp/warn-long-long-2.c: Update.
	* gcc.dg/cpp/warn-deprecated-2.c: Update.
	* gcc.dg/cpp/warn-multichar-2.c: Update.
	* gcc.dg/cpp/warn-normalized-3.c: Update.
	* gcc.dg/cpp/warn-cxx-compat-2.c: Update.
	* gcc.dg/cpp/warn-trigraphs-3.c: Update.
	* gcc.dg/cpp/warn-unused-macros-2.c: Update.
	* gcc.dg/cpp/warn-trigraphs-4.c: Update.
	* gcc.dg/cpp/warn-redefined-2.c: Update.
	* gfortran.dg/warning-directive-2.F90: Update.
	* c-c++-common/cpp/warning-directive-2.c: Update.

From-SVN: r158349

gcc/ChangeLog

+2010-04-14  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+
+	PR 42966
+	* diagnostics.c (diagnostic_report_diagnostic): Mark specially
+	warnings converted to errors.
+
 2010-04-14  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/alpha/alpha.c (alpha_adjust_cost): Remove set but not

gcc/diagnostic.c

@@ -426,11 +426,41 @@ diagnostic_report_diagnostic (diagnostic_context *context,
   ++diagnostic_kind_count (context, diagnostic->kind);
 
   saved_format_spec = diagnostic->message.format_spec;
-  if (context->show_option_requested && diagnostic->option_index)
-    diagnostic->message.format_spec
-      = ACONCAT ((diagnostic->message.format_spec,
-                  " [", cl_options[diagnostic->option_index].opt_text, "]", NULL));
+  if (context->show_option_requested)
+    {
+      const char * option_text = NULL;
 
+      if (diagnostic->option_index)
+	{
+	  /* A warning classified as an error.  */
+	  if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
+	      && diagnostic->kind == DK_ERROR)
+	    option_text 
+	      = ACONCAT ((cl_options[OPT_Werror_].opt_text,
+			  /* Skip over "-W".  */
+			  cl_options[diagnostic->option_index].opt_text + 2,
+			  NULL));
+	  /* A warning with option.  */
+	  else
+	    option_text = cl_options[diagnostic->option_index].opt_text;
+	}
+      /* A warning without option classified as an error.  */
+      else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
+	       || diagnostic->kind == DK_WARNING)
+	{
+	  if (context->warning_as_error_requested)
+	    option_text = cl_options[OPT_Werror].opt_text;
+	  else
+	    option_text = _("enabled by default");
+	}
+
+      if (option_text)
+	diagnostic->message.format_spec
+	  = ACONCAT ((diagnostic->message.format_spec,
+		      " ", 
+		      "[", option_text, "]",
+		      NULL));
+    }
   diagnostic->message.locus = &diagnostic->location;
   diagnostic->message.abstract_origin = &diagnostic->abstract_origin;
   diagnostic->abstract_origin = NULL;

gcc/testsuite/ChangeLog

+2010-04-14  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+
+	PR 42966
+	* gcc.dg/cpp/warn-undef-2.c: Update.
+	* gcc.dg/cpp/warn-traditional-2.c: Update.
+	* gcc.dg/cpp/warn-comments-2.c: Update.
+	* gcc.dg/cpp/warn-variadic-2.c: Update.
+	* gcc.dg/cpp/warn-long-long-2.c: Update.
+	* gcc.dg/cpp/warn-deprecated-2.c: Update.
+	* gcc.dg/cpp/warn-multichar-2.c: Update.
+	* gcc.dg/cpp/warn-normalized-3.c: Update.
+	* gcc.dg/cpp/warn-cxx-compat-2.c: Update.
+	* gcc.dg/cpp/warn-trigraphs-3.c: Update.
+	* gcc.dg/cpp/warn-unused-macros-2.c: Update.
+	* gcc.dg/cpp/warn-trigraphs-4.c: Update.
+	* gcc.dg/cpp/warn-redefined-2.c: Update.
+	* gfortran.dg/warning-directive-2.F90: Update.
+	* c-c++-common/cpp/warning-directive-2.c: Update.
+
 2010-04-14  Michael Matz  <matz@suse.de>
 
 	PR tree-optimization/42963

gcc/testsuite/c-c++-common/cpp/warning-directive-2.c

@@ -2,4 +2,4 @@
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=cpp" { target c } }
 // { dg-options "-fdiagnostics-show-option -Werror=cpp" { target c++ } }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#warning "Printed"  // { dg-error "\"Printed\" .-Wcpp." }
+#warning "Printed"  // { dg-error "\"Printed\" .-Werror=cpp." }

gcc/testsuite/gcc.dg/cpp/warn-comments-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=comments" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-/* /* */  // { dg-error "\"\.\*\" within comment .-Wcomments." }
+/* /* */  // { dg-error "\"\.\*\" within comment .-Werror=comments." }
 
 // \
-          // { dg-error "multi-line comment .-Wcomments." "multi-line" { target *-*-* } 6 }
+          // { dg-error "multi-line comment .-Werror=comments." "multi-line" { target *-*-* } 6 }

gcc/testsuite/gcc.dg/cpp/warn-cxx-compat-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=c++-compat" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#define not !  // { dg-error "identifier \"not\" is a special operator name in C\\+\\+ .-Wc\\+\\+-compat." }
+#define not !  // { dg-error "identifier \"not\" is a special operator name in C\\+\\+ .-Werror=c\\+\\+-compat." }

gcc/testsuite/gcc.dg/cpp/warn-deprecated-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=deprecated" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#assert x(x)  // { dg-error "#assert is a deprecated GCC extension .-Wdeprecated." }
+#assert x(x)  // { dg-error "#assert is a deprecated GCC extension .-Werror=deprecated." }
 
-#if #x(x)     // { dg-error "assertions are a deprecated extension .-Wdeprecated." }
+#if #x(x)     // { dg-error "assertions are a deprecated extension .-Werror=deprecated." }
 #endif

gcc/testsuite/gcc.dg/cpp/warn-long-long-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Wtraditional -Werror=long-long" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#if 0LL  // { dg-error "traditional C rejects the \"LL\" suffix .-Wlong-long." }
-         // { dg-error "use of C99 long long integer constant .-Wlong-long." "use long long" { target *-*-* } 4 }
+#if 0LL  // { dg-error "traditional C rejects the \"LL\" suffix .-Werror=long-long." }
+         // { dg-error "use of C99 long long integer constant .-Werror=long-long." "use long long" { target *-*-* } 4 }
 #endif

gcc/testsuite/gcc.dg/cpp/warn-multichar-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=multichar" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#if 'abc'  // { dg-error "multi-character character constant .-Wmultichar." }
+#if 'abc'  // { dg-error "multi-character character constant .-Werror=multichar." }
 #endif

gcc/testsuite/gcc.dg/cpp/warn-normalized-3.c

@@ -2,4 +2,4 @@
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -fextended-identifiers -Werror=normalized=" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
         // { dg-prune-output ".*-Werror=normalized=: Set -Wnormalized=nfc.*" }
-\u0F43  // { dg-error "`.U00000f43' is not in NFC .-Wnormalized=." }
+\u0F43  // { dg-error "`.U00000f43' is not in NFC .-Werror=normalized=." }

gcc/testsuite/gcc.dg/cpp/warn-redefined-2.c

@@ -6,7 +6,7 @@
 // { dg-bogus "__TIME__ builtin is not defined" "no-time" { target *-*-* } 5 }
 #endif
 
-#define __TIME__ "X"  // { dg-error "\"__TIME__\" redefined .-Wbuiltin-macro-redefined." }
+#define __TIME__ "X"  // { dg-error "\"__TIME__\" redefined .-Werror=builtin-macro-redefined." }
 
 #define __TIME__ "Y"  // { dg-bogus "-Wbuiltin-macro-redefined" }
                       // { dg-warning "\"__TIME__\" redefined" "not-builtin-1" { target *-*-* } 11 }

gcc/testsuite/gcc.dg/cpp/warn-traditional-2.c

 // { dg-do compile }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=traditional -Wno-deprecated -Wno-long-long" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#assert x(x)         // { dg-error "suggest hiding #assert from traditional C with an indented # .-Wtraditional." }
+#assert x(x)         // { dg-error "suggest hiding #assert from traditional C with an indented # .-Werror=traditional." }
 
- #define X X         // { dg-error "traditional C ignores #define with the # indented .-Wtraditional." }
+ #define X X         // { dg-error "traditional C ignores #define with the # indented .-Werror=traditional." }
 
 #if 0
-#elif 1              // { dg-error "suggest not using #elif in traditional C .-Wtraditional." }
+#elif 1              // { dg-error "suggest not using #elif in traditional C .-Werror=traditional." }
 #endif
 
 #define f(X) X
-int f;               // { dg-error "function-like macro \"f\" must be used with arguments in traditional C .-Wtraditional." }
+int f;               // { dg-error "function-like macro \"f\" must be used with arguments in traditional C .-Werror=traditional." }
 
-#if 0U               // { dg-error "traditional C rejects the \"U\" suffix .-Wtraditional." }
+#if 0U               // { dg-error "traditional C rejects the \"U\" suffix .-Werror=traditional." }
 #endif
 
-#if +1               // { dg-error " traditional C rejects the unary plus operator .-Wtraditional." }
+#if +1               // { dg-error " traditional C rejects the unary plus operator .-Werror=traditional." }
 #endif
 
-char *x = "\x0";     // { dg-error "the meaning of '.x' is different in traditional C .-Wtraditional." }
-char *y = "\a";      // { dg-error "the meaning of '.a' is different in traditional C .-Wtraditional." }
-char *z = "\u0F43";  // { dg-error "the meaning of '.u' is different in traditional C .-Wtraditional." }
+char *x = "\x0";     // { dg-error "the meaning of '.x' is different in traditional C .-Werror=traditional." }
+char *y = "\a";      // { dg-error "the meaning of '.a' is different in traditional C .-Werror=traditional." }
+char *z = "\u0F43";  // { dg-error "the meaning of '.u' is different in traditional C .-Werror=traditional." }

gcc/testsuite/gcc.dg/cpp/warn-trigraphs-3.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -trigraphs -Werror=trigraphs" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-??=  // { dg-error "trigraph \\?\\?= converted to # .-Wtrigraphs." }
+??=  // { dg-error "trigraph \\?\\?= converted to # .-Werror=trigraphs." }

gcc/testsuite/gcc.dg/cpp/warn-trigraphs-4.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=trigraphs" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-??=  // { dg-error "trigraph \\?\\?= ignored, use -trigraphs to enable .-Wtrigraphs." }
+??=  // { dg-error "trigraph \\?\\?= ignored, use -trigraphs to enable .-Werror=trigraphs." }

gcc/testsuite/gcc.dg/cpp/warn-undef-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=undef" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#if x  // { dg-error "\"x\" is not defined .-Wundef." }
+#if x  // { dg-error "\"x\" is not defined .-Werror=undef." }
 #endif

gcc/testsuite/gcc.dg/cpp/warn-unused-macros-2.c

 // { dg-do preprocess }
 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=unused-macros" }
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#define X X  // { dg-error "macro \"X\" is not used .-Wunused-macros." }
+#define X X  // { dg-error "macro \"X\" is not used .-Werror=unused-macros." }

gcc/testsuite/gcc.dg/cpp/warn-variadic-2.c

 /* { dg-do preprocess } */
 /* { dg-options "-ansi -fdiagnostics-show-option -pedantic -Werror=variadic-macros" } */
 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
-#define F(...) X   /* { dg-error "anonymous variadic macros were introduced in C99 .-Wvariadic-macros." } */
+#define F(...) X   /* { dg-error "anonymous variadic macros were introduced in C99 .-Werror=variadic-macros." } */
 
-#define G(X...) X  /* { dg-error "ISO C does not permit named variadic macros .-Wvariadic-macros." } */
+#define G(X...) X  /* { dg-error "ISO C does not permit named variadic macros .-Werror=variadic-macros." } */

gcc/testsuite/gfortran.dg/warning-directive-2.F90

@@ -2,4 +2,4 @@
 ! { dg-options "-std=f95 -fdiagnostics-show-option -Werror=cpp" }
 ! { dg-warning "some warnings being treated as errors" "" {target "*-*-*"} 0 } 
 #warning "Printed"
-! { dg-error "\"Printed\" .-Wcpp." "" { target *-*-* } 4 }
+! { dg-error "\"Printed\" .-Werror=cpp." "" { target *-*-* } 4 }