From 93ef3b1d814ad4fc2a71aeb1fcce1cfde307e172 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Sat, 17 Aug 2013 21:28:10 +0200
Subject: [PATCH] can-utils: Don't overwrite PREFIX and DESTDIR when provided
 via the environment
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For creating a Debian package providing PREFIX and DESTDIR via the
environment is the easiest option. So use ?= to assign these two
variables to honor the values in the environment.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index c3e6d9c..2f79ee7 100644
--- a/Makefile
+++ b/Makefile
@@ -38,8 +38,8 @@
 #
 #  Send feedback to <linux-can@vger.kernel.org>
 
-DESTDIR =
-PREFIX = /usr/local
+DESTDIR ?=
+PREFIX ?= /usr/local
 
 MAKEFLAGS = -k