re PR other/17594 (GCC does not error about unknown options which starts with a valid option)

(gcc)

	PR diagnostic/17594
	* opts.c (find_opt): Require that the input match a switch exactly
	or that the switch take a joined option to be interpreted as a
	match for another language.

(gcc/testsuite)

	* gcc.dg/funroll-loops-all.c: New.

From-SVN: r91444

gcc/ChangeLog

+2004-11-28  Matt Kraai  <kraai@alumni.cmu.edu>
+
+	PR diagnostic/17594
+	* opts.c (find_opt): Require that the input match a switch exactly
+	or that the switch take a joined option to be interpreted as a
+	match for another language.
+
 2004-11-28  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	* timevar.def (TV_TREE_REDPHI): New timevar.

gcc/opts.c

@@ -176,13 +176,13 @@ find_opt (const char *input, int lang_mask)
     {
       const struct cl_option *opt = &cl_options[mn];
 
-      /* Is this switch a prefix of the input?  */
-      if (!strncmp (input, opt->opt_text + 1, opt->opt_len))
+      /* Is the input either an exact match or a prefix that takes a
+	 joined argument?  */
+      if (!strncmp (input, opt->opt_text + 1, opt->opt_len)
+	  && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED)))
 	{
-	  /* If language is OK, and the match is exact or the switch
-	     takes a joined argument, return it.  */
-	  if ((opt->flags & lang_mask)
-	      && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED)))
+	  /* If language is OK, return it.  */
+	  if (opt->flags & lang_mask)
 	    return mn;
 
 	  /* If we haven't remembered a prior match, remember this

gcc/testsuite/ChangeLog

+2004-11-28  Matt Kraai  <kraai@alumni.cmu.edu>
+
+	* gcc.dg/funroll-loops-all.c: New.
+
 2004-11-28  Hans-Peter Nilsson  <hp@bitrange.com>
 
 	PR target/18489

gcc/testsuite/gcc.dg/funroll-loops-all.c

+/* PR 17594 */
+/* { dg-do compile } */
+/* { dg-options "-funroll-loops-all" } */
+/* { dg-error "unrecognized command line option \"-funroll-loops-all\"" "" { target *-*-* } 0 } */