From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 12 Sep 2015 17:15:44 +0000 (+0000)
Subject: Makefiles: Do not override PREFIX or DESTDIR from the environment
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=508d6b31bd9564fa2f0a6676089d4495d2917a2d;p=wiringPi.git

Makefiles: Do not override PREFIX or DESTDIR from the environment

These are not set in normal shell sessions.  Honouring existing
settings allows the caller of ./build to specify alternative values.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/devLib/Makefile b/devLib/Makefile
index 48cf3ae..9ec163d 100644
--- a/devLib/Makefile
+++ b/devLib/Makefile
@@ -22,8 +22,8 @@
 #################################################################################
 
 VERSION=$(shell cat ../VERSION)
-DESTDIR=/usr
-PREFIX=/local
+DESTDIR?=/usr
+PREFIX?=/local
 
 ifneq ($V,1)
 Q ?= @
diff --git a/gpio/Makefile b/gpio/Makefile
index 82a817c..095ec48 100644
--- a/gpio/Makefile
+++ b/gpio/Makefile
@@ -23,8 +23,8 @@
 #    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
 #################################################################################
 
-DESTDIR=/usr
-PREFIX=/local
+DESTDIR?=/usr
+PREFIX?=/local
 
 ifneq ($V,1)
 Q ?= @
diff --git a/wiringPi/Makefile b/wiringPi/Makefile
index 3a1b99f..c0623ce 100644
--- a/wiringPi/Makefile
+++ b/wiringPi/Makefile
@@ -22,8 +22,8 @@
 #################################################################################
 
 VERSION=$(shell cat ../VERSION)
-DESTDIR=/usr
-PREFIX=/local
+DESTDIR?=/usr
+PREFIX?=/local
 
 ifneq ($V,1)
 Q ?= @