Patch from Richard Guenther.

* commom.opt (Wfatal-errors): Add it.
* diagnostic.c (flag_fatal_errors): Define it.
(diagnostic_action_after_output): Check for flag_fatal_errors.
* flags.h (flag_fatal_errors): Declare it.
* opts.c (common_handle_option): Add OPT_Wfatal_errors.
* doc/invoke.texi (Warning Options): Document -Wfatal-errors.

From-SVN: r81323

gcc/ChangeLog

+2004-04-29  Richard Guenther  <richard.guenther@uni-tuebingen.de>
+
+	* commom.opt (Wfatal-errors): Add it.
+	* diagnostic.c (flag_fatal_errors): Define it.
+	(diagnostic_action_after_output): Check for flag_fatal_errors.
+	* flags.h (flag_fatal_errors): Declare it.
+	* opts.c (common_handle_option): Add OPT_Wfatal_errors.
+	* doc/invoke.texi (Warning Options): Document -Wfatal-errors.
+
 2004-04-30  Josef Zlomek  <zlomekj@suse.cz>
 
 	* gcse.c (remove_reachable_equiv_notes): Delete notes also in

gcc/common.opt

@@ -76,6 +76,10 @@ Wextra
 Common
 Print extra (possibly unwanted) warnings
 
+Wfatal-errors
+Common
+Exit on the first error occurred
+
 Winline
 Common
 Warn when an inlined function cannot be inlined

gcc/diagnostic.c

@@ -67,6 +67,7 @@ diagnostic_context *global_dc = &global_diagnostic_context;
 with preprocessed source if appropriate.\n\
 See %s for instructions.\n"
 
+int flag_fatal_errors = 0;
 
 /* Return a malloc'd string containing MSG formatted a la printf.  The
    caller is responsible for freeing the memory.  */
@@ -264,6 +265,11 @@ diagnostic_action_after_output (diagnostic_context *context,
     case DK_SORRY:
       if (context->abort_on_error)
 	real_abort ();
+      if (flag_fatal_errors)
+	{
+	  fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n");
+	  exit (FATAL_EXIT_CODE);
+	}
       break;
 
     case DK_ICE:

gcc/doc/invoke.texi

@@ -214,7 +214,7 @@ in the following sections.
 -Wconversion  -Wno-deprecated-declarations @gol
 -Wdisabled-optimization  -Wno-div-by-zero  -Wendif-labels @gol
 -Werror  -Werror-implicit-function-declaration @gol
--Wfloat-equal  -Wformat  -Wformat=2 @gol
+-Wfatal-errors  -Wfloat-equal  -Wformat  -Wformat=2 @gol
 -Wno-format-extra-args -Wformat-nonliteral @gol
 -Wformat-security  -Wformat-y2k @gol
 -Wimplicit  -Wimplicit-function-declaration  -Wimplicit-int @gol
@@ -2065,6 +2065,12 @@ machines.
 Warn whenever a comment-start sequence @samp{/*} appears in a @samp{/*}
 comment, or whenever a Backslash-Newline appears in a @samp{//} comment.
 
+@item -Wfatal-errors
+@opindex Wfatal-errors
+This option causes the compiler to abort compilation on the first error
+occurred rather than trying to keep going and printing further error
+messages.
+
 @item -Wformat
 @opindex Wformat
 Check calls to @code{printf} and @code{scanf}, etc., to make sure that

gcc/flags.h

@@ -407,6 +407,10 @@ extern int flag_really_no_inline;
 extern int flag_syntax_only;
 extern int rtl_dump_and_exit;
 
+/* Nonzero if we are exiting on the first error occurred.  */
+
+extern int flag_fatal_errors;
+
 /* Nonzero means we should save auxiliary info into a .X file.  */
 
 extern int flag_gen_aux_info;

gcc/opts.c

@@ -742,6 +742,10 @@ common_handle_option (size_t scode, const char *arg,
       set_Wextra (value);
       break;
 
+    case OPT_Wfatal_errors:
+      flag_fatal_errors = value;
+      break;
+
     case OPT_Winline:
       warn_inline = value;
       break;