--- ./mk/FreeBSD.orig	2014-02-28 09:14:15.972688127 +0100
+++ ./mk/FreeBSD	2014-02-28 09:15:04.890685340 +0100
@@ -7,10 +7,10 @@
 # (C) Copyright 2000-2006 by Michal Zalewski <lcamtuf@coredump.cx>
 #
 
-CC      = gcc
+CC      ?= gcc
 LIBS	= -lpcap
 STRIP   = strip
-CFLAGS  = -O3 -Wall -fomit-frame-pointer -funroll-loops \
+CFLAGS  += -Wall \
           -DUSE_BPF=\"${USE_BPF}\" \
 	  -I/usr/include/pcap -I/usr/local/include/pcap -I/usr/local/include
 FILE	= p0f