From bb9fc867353620492f8e5ac84e64e5a8faaa01fa Mon Sep 17 00:00:00 2001
From: Daniel Wang <hello@danielwang.me>
Date: Thu, 19 Jul 2018 19:02:37 -0400
Subject: [PATCH] Add .so extension if ext_suffix is None

---
 setup.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/setup.py b/setup.py
index ab559776a..23635782d 100644
--- a/setup.py
+++ b/setup.py
@@ -79,8 +79,8 @@ class Config(object):
 
         self.ext_suffix = sysconfig.get_config_var("EXT_SUFFIX")
         if self.ext_suffix is None:
-            self.ext_suffix = ""
-            
+            self.ext_suffix = ".so"
+
         self.root = "klayout"
 
     def libname_of(self, mod):