--- src/Makefile.orig	Sun Oct 24 18:51:53 1999
+++ src/Makefile	Wed Jan  5 22:11:35 2000
@@ -61,7 +61,7 @@
 # OPTIONS = -DDEBUG -g -Wall			# only for debugging purposes
 # OPTIONS = -O3 -Wall -ansi -pedantic
 # OPTIONS = -O3 -Wall
-OPTIONS = -O3
+OPTIONS ?= -O3
 
 # SYSTEM = -DSYSV -Ae		# may be needed for HP-UX