Added new option --target-help.

From-SVN: r36910

gcc/ChangeLog

+2000-10-17  Chandrakala Chavva  <cchavva@redhat.com>
+
+	* gcc.c: New options --target-help.
+	(process_command): Added code to parse this new option.
+	* toplev.c (display_target_options): New function to support the
+	above new option.
+	* cppinit.c (new_pending_directive) : New option OPT_target__help.
+	(cpp_handle_option): Support this new option.
+	* invoke.texi: Added notes about --target-help option.
+	
 2000-10-17  Graham Stott  <grahams@redhat.com>
  
 	* config/i386/i386.md (testqi_1): Add missing operand prefix

gcc/invoke.texi

@@ -90,7 +90,7 @@ in the following sections.
 @item Overall Options
 @xref{Overall Options,,Options Controlling the Kind of Output}.
 @smallexample
--c  -S  -E  -o @var{file}  -pipe  -pass-exit-codes  -v  --help  -x @var{language}
+-c  -S  -E  -o @var{file}  -pipe  -pass-exit-codes  -v  --target-help  --help  -x @var{language}
 @end smallexample
 
 @item C Language Options
@@ -646,6 +646,10 @@ invoked by @code{gcc}, so that they can display the command line options
 they accept.  If the @code{-W} option is also specified then command
 line options which have no documentation associated with them will also
 be displayed.
+
+@item --target-help
+Print (on the standard output) a description of target specific command
+line options for each tool.
 @end table
 
 @node Invoking G++

gcc/toplev.c

@@ -170,6 +170,7 @@ static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
 #endif
 static void compile_file PARAMS ((const char *));
 static void display_help PARAMS ((void));
+static void display_target_options PARAMS ((void));
 static void mark_file_stack PARAMS ((void *));
 
 static void decode_d_option PARAMS ((const char *));
@@ -3886,6 +3887,15 @@ display_help ()
     printf (_("\nThere are undocumented %s specific options as well.\n"),
 	    lang);
 
+  display_target_options ();
+}
+
+void
+display_target_options ()
+{
+  int undoc,i;
+  unsigned long;
+
   if (ARRAY_SIZE (target_switches) > 1
 #ifdef TARGET_OPTIONS
       || ARRAY_SIZE (target_options) > 1
@@ -3910,10 +3920,10 @@ display_help ()
 	      undoc = 1;
 
 	      if (extra_warnings)
-		printf (_("  -m%-21.21s [undocumented]\n"), option);
+		printf (_("  -m%-23.23s [undocumented]\n"), option);
 	    }
 	  else if (* description != 0)
-	    doc += printf ("  -m%-21.21s %s\n", option, description);
+	    doc += printf ("  -m%-23.23s %s\n", option, description);
 	}
 
 #ifdef TARGET_OPTIONS
@@ -3929,10 +3939,10 @@ display_help ()
 	      undoc = 1;
 
 	      if (extra_warnings)
-		printf (_("  -m%-21.21s [undocumented]\n"), option);
+		printf (_("  -m%-23.23s [undocumented]\n"), option);
 	    }
 	  else if (* description != 0)
-	    doc += printf ("  -m%-21.21s %s\n", option, description);
+	    doc += printf ("  -m%-23.23s %s\n", option, description);
 	}
 #endif
       if (undoc)
@@ -4307,6 +4317,12 @@ independent_decode_option (argc, argv)
       exit (0);
     }
 
+  if (!strcmp (arg, "-target-help"))
+    {
+      display_target_options ();
+      exit (0);
+    }
+
   if (*arg == 'Y')
     arg++;