$OpenBSD: patch-Makefile,v 1.1.1.1 2012/09/17 13:51:51 phessler Exp $
--- Makefile.orig	Sat Sep 15 09:57:50 2012
+++ Makefile	Sat Sep 15 09:58:14 2012
@@ -4,7 +4,8 @@ PROG= nsh
 
 # For use with flashrd:
 #CFLAGS=-O -DDHCPLEASES=\"/flash/dhcpd.leases\" -Wmissing-prototypes -Wformat -Wall -Wpointer-arith -Wbad-function-cast #-W
-CFLAGS=-O -Wmissing-prototypes -Wformat -Wall -Wpointer-arith -Wbad-function-cast #-W
+CFLAGS?=-O
+CFLAGS+=-Wmissing-prototypes -Wformat -Wall -Wpointer-arith -Wbad-function-cast #-W
 
 SRCS=arp.c compile.c main.c genget.c commands.c stats.c routesys.c
 SRCS+=ctl.c show.c if.c version.c route.c conf.c complete.c ieee80211.c
