--- Makefile.orig	2009-04-27 13:03:30.000000000 +0200
+++ Makefile	2009-12-10 01:51:53.000000000 +0100
@@ -21,7 +21,8 @@
 include Makefile.cfg
 
 export CC = gcc -pthread
-export CFLAGS += -I. -Wall -Os -ggdb -D_GNU_SOURCE -fPIC
+export OPTFLAGS = -Os -ggdb
+export CFLAGS += -I. -Wall $(OPTFLAGS) -D_GNU_SOURCE -fPIC
 export LDLIBS += -lncursesw
 
 VERSION := 0.20