--- Makefile.orig	Tue May 16 14:31:04 2000
+++ Makefile	Thu May 18 17:31:44 2000
@@ -2,5 +2,6 @@
 SHELL=/bin/sh
-CC=gcc
+CC?=gcc
 BIGFILES=-D_FILE_OFFSET_BITS=64
-CFLAGS=-Wall -Winline -O2 -fomit-frame-pointer -fno-strength-reduce $(BIGFILES)
+CFLAGS?=-O2
+CFLAGS+=-Wall -Winline -O2 -fomit-frame-pointer -fno-strength-reduce $(BIGFILES)