From 32ca9a9f68a8c055ab2d86a41102a1205085a526 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois=20Bissey?= <francois.bissey@canterbury.ac.nz>
Date: Thu, 15 Dec 2016 11:42:17 +1300
Subject: [PATCH] Do not override MACOSX_DEPLOYMENT_TARGET if it is already
 defined.

---
 Makefile.system | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Makefile.system b/Makefile.system
index b05177b6c..d4b3709d1 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -217,7 +217,9 @@ endif
 #
 
 ifeq ($(OSNAME), Darwin)
+ifndef MACOSX_DEPLOYMENT_TARGET
 export MACOSX_DEPLOYMENT_TARGET=10.6
+endif
 MD5SUM = md5 -r
 endif