$NetBSD$

Allow pkgsrc to override CFLAGS.

--- Makefile.orig	2014-04-26 18:59:49.000000000 +0000
+++ Makefile
@@ -1,5 +1,5 @@
 CC = gcc
-CFLAGS = -g -O0 -Wall -Wextra
+#CFLAGS += -g -O0 -Wall -Wextra
 CFLAGS += -std=c99 -D_POSIX_C_SOURCE=200112L
 CFLAGS += -Iinclude/
 
