From 5115d24d2c9becf83320937bfb331fb766252dbc Mon Sep 17 00:00:00 2001
From: Eric Fiselier <eric@efcs.ca>
Date: Thu, 9 Feb 2017 23:29:08 +0000
Subject: [PATCH] add missing python import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@294660 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/libcxx/util.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utils/libcxx/util.py b/utils/libcxx/util.py
index 389fc32aa..ecfb9afb7 100644
--- a/utils/libcxx/util.py
+++ b/utils/libcxx/util.py
@@ -8,13 +8,14 @@
 #===----------------------------------------------------------------------===##
 
 from contextlib import contextmanager
+import errno
 import os
 import platform
 import signal
 import subprocess
 import sys
 import tempfile
-
+import threading
 
 
 # FIXME: Most of these functions are cribbed from LIT