Index: driver/cc1.cc
===================================================================
--- driver/cc1.cc	(revision e35a32b2a7e933ee8d23dc606b6d66f5f775c938)
+++ 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__