Merge pull request #1032 from kiwifb/OSX_target
authorZhang Xianyi <traits.zhang@gmail.com>
Sun, 18 Dec 2016 06:48:22 +0000 (14:48 +0800)
committerGitHub <noreply@github.com>
Sun, 18 Dec 2016 06:48:22 +0000 (14:48 +0800)
Do not override MACOSX_DEPLOYMENT_TARGET if it is already defined.


Trivial merge