$NetBSD: patch-ab,v 1.3 2001/02/09 11:29:37 dmcmahill Exp $

--- src/zbuf/Makefile.default.orig	Tue Nov 12 14:18:57 1996
+++ src/zbuf/Makefile.default	Thu Feb  8 20:08:06 2001
@@ -37,5 +37,5 @@
 $(IO)/dump_struct.c $(IO)/savemat_mod.c
 
-LIBS = -lm
+LIBS?= -lm
 
 # These compile flags are needed to account for differences in the
@@ -44,5 +44,5 @@
 #
 # for generic machine use (timers not supported)
-CFLAGS = -O -DOTHER
+CFLAGS = -O2 -DOTHER
 # for most machines running 4.2/3 use (only necessary if timers are needed)
 #CFLAGS = -O -DFOUR