Add macOS big sur compatibility
diff --git a/python/setup.py b/python/setup.py
index d003c96..aab240a 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -207,7 +207,7 @@
# C++ projects must now migrate to libc++ and are recommended to set a
# deployment target of macOS 10.9 or later, or iOS 7 or later.
if sys.platform == 'darwin':
- mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
+ mac_target = str(sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET'))
if mac_target and (pkg_resources.parse_version(mac_target) <
pkg_resources.parse_version('10.9.0')):
os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
