document gcc --help=common

2012-02-28  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>

	* gcc.c (display_help): Document --help=common and sort entries
	alphabetically.

From-SVN: r184633

gcc/ChangeLog

 2012-02-28  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
 
+	* gcc.c (display_help): Document --help=common and sort entries
+	alphabetically.
+
+2012-02-28  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
+
 	* doc/install.texi: Document check-$LANG specific shortcuts
 
 2012-02-28  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

gcc/gcc.c

@@ -2958,7 +2958,7 @@ display_help (void)
   fputs (_("  -pass-exit-codes         Exit with highest error code from a phase\n"), stdout);
   fputs (_("  --help                   Display this information\n"), stdout);
   fputs (_("  --target-help            Display target specific command line options\n"), stdout);
-  fputs (_("  --help={target|optimizers|warnings|params|[^]{joined|separate|undocumented}}[,...]\n"), stdout);
+  fputs (_("  --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]\n"), stdout);
   fputs (_("                           Display specific types of command line options\n"), stdout);
   if (! verbose_flag)
     fputs (_("  (Use '-v --help' to display command line options of sub-processes)\n"), stdout);