Index: driver/cc1.cc
===================================================================
--- driver/cc1.cc	(revision 62006a3b91df05be204eecb450e2061cb6540191)
+++ driver/cc1.cc	(revision a804f81298e916805241c4eb6b0be21bac7c648e)
@@ -383,5 +383,5 @@
 				// strip inappropriate flags with an argument
 
-			} else if ( arg == "-auxbase" || arg == "-auxbase-strip" || arg == "-dumpbase" ) {
+			} else if ( arg == "-auxbase" || arg == "-auxbase-strip" || arg == "-dumpbase" || arg == "-dumpdir" ) {
 				i += 1;
 				#ifdef __DEBUG_H__