--- makefile.orig	Fri Feb  2 07:12:20 2007
+++ makefile	Sun Feb 11 15:57:23 2007
@@ -10,7 +10,7 @@
 else
 OS_CCDEFS = -D_GNU_SOURCE
 endif
-CC = gcc -std=c99 -O2 -U__STRICT_ANSI__ -g -lm -lrt $(OS_CCDEFS) -I .
+CC += ${CFLAGS} -lm $(OS_CCDEFS) -I .
 ifeq ($(USE_NETWORK),)
 else
 NETWORK_OPT = -DUSE_NETWORK -isystem /usr/local/include /usr/local/lib/libpcap.a
