Fix build failing on Mac OS X 10.8 or earlier #19

Author: dahlia

docs/changes.rst

@@ -6,6 +6,8 @@ Version 0.4.2
 
 To be released.
 
+- Fixed build failing on Mac OS X 10.8 or earlier.  [:issue:`19`]
+
 
 Version 0.4.1
 -------------

setup.py

@@ -6,6 +6,7 @@
 import glob
 import os
 import os.path
+import platform
 import re
 import shutil
 import sys
@@ -67,7 +68,9 @@ def spawn(self, cmd):
     link_flags = []
 else:
     flags = ['-fPIC', '-Wall', '-Wno-parentheses']
-    if sys.platform == 'darwin':
+    platform.mac_ver()
+    if platform.system() == 'Darwin' and \
+       tuple(map(int, platform.mac_ver()[0].split('.'))) >= (10, 9):
         flags.append(
             '-Wno-error=unused-command-line-argument-hard-error-in-future'
         )