1 files changed, 12 insertions, 0 deletions
diff --git a/setup.py b/setup.py
index 018d0470f4..e2de96de35 100644
--- a/setup.py
+++ b/setup.py
@@ -33,9 +33,11 @@ import os
 import os.path
 import shutil
 import sys
+import sysconfig
 
 from distutils import core as _core
 from distutils import extension as _extension
+import pkg_resources
 import setuptools
 from setuptools.command import egg_info
 
@@ -110,6 +112,16 @@ if "linux" in sys.platform or "darwin" in sys.platform:
   DEFINE_MACROS += (('PyMODINIT_FUNC', pymodinit),)
 
 
+# By default, Python3 distutils enforces compatibility of
+# c plugins (.so files) with the OSX version Python3 was built with.
+# For Python3.4, this is OSX 10.6, but we need Thread Local Support (__thread)
+if 'darwin' in sys.platform and PY3:
+  mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
+  if mac_target and (pkg_resources.parse_version(mac_target) <
+                     pkg_resources.parse_version('10.7.0')):
+    os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.7'
+
+
 def cython_extensions(module_names, extra_sources, include_dirs,
                       libraries, define_macros, build_with_cython=False):
   # Set compiler directives linetrace argument only if we care about tracing;