$OpenBSD: patch-src_Makefile,v 1.1.1.1 2017/04/20 13:48:29 fcambus Exp $
--- src/Makefile.orig	Wed Apr  5 23:29:56 2017
+++ src/Makefile	Wed Apr  5 23:31:25 2017
@@ -2,7 +2,7 @@
 
 CC=gcc
 CFLAGS0:=$(CFLAGS)
-CFLAGS+=-I. -Wall -W -O3
+CFLAGS+=-I. -Wall -W
 LDFLAGS0:=$(LDFLAGS)
 ifeq ($(findstring darwin,$(OSTYPE)),) # false if OSTYPE contains "darwin"
 # On Mac OS X using -s gives the following warning:
