(process_command): Add "include" prefix for [blah/]stageN.

From-SVN: r6968

gcc/gcc.c

@@ -2432,12 +2432,16 @@ process_command (argc, argv)
 		add_prefix (&include_prefix, concat (value, "include", ""),
 			    1, 0, 0);
 
-		/* As a kludge, if the arg is "stageN/", just add
+		/* As a kludge, if the arg is "[blah/]stageN/", just add
 		   "include" to the include prefix.  */
-		if (strlen (value) == 7 && value[6] == '/'
-		    && strncmp (value, "stage", 5) == 0
-		    && isdigit (value[5]))
-		  add_prefix (&include_prefix, "include", 1, 0, 0);
+		{
+		  int len = strlen (value);
+		  if ((len == 7 || (len > 7 && value[len-8] == '/'))
+		      && strncmp (value+len-7, "stage", 5) == 0
+		      && isdigit (value[len-2])
+		      && value[len-1] == '/')
+		    add_prefix (&include_prefix, "include", 1, 0, 0);
+		}
 	      }
 	      break;