$NetBSD: patch-ab,v 1.11 2009/01/12 19:22:18 adam Exp $

--- src/Makefile.orig	2008-11-03 21:22:19.000000000 +0100
+++ src/Makefile
@@ -160,8 +160,10 @@ ifdef BUILD_DIST			# distribution build
 OPTIONS = -O3 -Wall
 endif
 
-CFLAGS = $(OPTIONS) $(SYS_CFLAGS)  $(EXTRA_CFLAGS) $(CONFIG)
-LDFLAGS =           $(SYS_LDFLAGS) $(EXTRA_LDFLAGS) -lm
+# pkgsrc presets those variables, so use '+=' to append to them
+# flags for debugging or optimisation may be supplied from the pkgsrc Makefile
+CFLAGS += $(SYS_CFLAGS)  $(EXTRA_CFLAGS) $(CONFIG)
+LDFLAGS += $(SYS_LDFLAGS) $(EXTRA_LDFLAGS) -lm
 
 
 SRCS =	main.c		\