From a24a5f77b61676b4b51179b9ac0113769d822c61 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 24 Dec 2013 16:26:29 +0530
Subject: [PATCH] ...

---
 setup/extensions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup/extensions.py b/setup/extensions.py
index 28585c1630..0029adf4cb 100644
--- a/setup/extensions.py
+++ b/setup/extensions.py
@@ -427,7 +427,7 @@ class Build(Command):
             obj = self.j(obj_dir, os.path.splitext(self.b(src))[0]+'.o')
             objects.append(obj)
             if self.newer(obj, [src]+ext.headers):
-                inf = '/Tp' if src.endswith('.cpp') else '/Tc'
+                inf = '/Tp' if src.endswith('.cpp') or src.endswith('.cxx') else '/Tc'
                 sinc = [inf+src] if iswindows else ['-c', src]
                 oinc = ['/Fo'+obj] if iswindows else ['-o', obj]
                 cmd = [compiler] + cflags + ext.cflags + einc + sinc + oinc