--- Makefile.in.orig	Mon Nov 29 11:36:21 1999
+++ Makefile.in	Fri Mar 24 19:22:32 2000
@@ -41,7 +41,7 @@
 YACCFLAGS = -d -p kn -b k
 LEXFLAGS2 = -Pkv -s -i
 LEXFLAGS = -Cr -Pkn -s -i
-CFLAGS = -O2 -Wall # -g
+CFLAGS ?= -O2 -Wall # -g
 RMFLAGS2 = -rf
 RMFLAGS = -f
 NROFFFLAGS = -mandoc