$NetBSD: patch-Makefile,v 1.1 2013/05/11 21:15:55 agc Exp $

Take ${CC} from environment

--- Makefile	2013/05/11 20:47:52	1.1
+++ Makefile	2013/05/11 20:48:02
@@ -1,7 +1,7 @@
 #
 # SI6 Networks' IPv6 toolkit Makefile
 #
-CC= gcc
+CC?= gcc
 CFLAGS+= -Wall
 LDFLAGS+= -lpcap -lm
 MANPATH= /usr/share/man