--- syslinux-4.03.orig/MCONFIG.build	2010-10-20 21:25:38.000000000 +0200
+++ syslinux-4.03/MCONFIG.build	2011-01-22 00:21:14.348658474 +0100
@@ -18,7 +18,8 @@ include $(topdir)/MCONFIG
 
 OPTFLAGS   = -g -Os
 INCLUDES   =
-CFLAGS     = -W -Wall -Wno-sign-compare -D_FILE_OFFSET_BITS=64 \
+CFLAGS	  ?=
+CFLAGS     += -W -Wall -Wno-sign-compare -D_FILE_OFFSET_BITS=64 \
              $(OPTFLAGS) $(INCLUDES)
 LDFLAGS    =
 LIBS	   =
