Index: libbridge/Makefile.in
===================================================================
--- libbridge/Makefile.in.orig
+++ libbridge/Makefile.in
@@ -5,7 +5,7 @@ AR=ar
 RANLIB=@RANLIB@
 
 CC=@CC@
-CFLAGS = -Wall @CFLAGS@ $(KERNEL_HEADERS)
+CFLAGS += -Wall @CFLAGS@ $(KERNEL_HEADERS)
 
 prefix=@prefix@
 exec_prefix=@exec_prefix@