From 94c84b49f1122d7e25d3ca19473f0a7b546bbf19 Mon Sep 17 00:00:00 2001
From: wiredfool <eric-github@soroos.net>
Date: Mon, 1 Feb 2016 08:11:42 -0800
Subject: [PATCH] Disable multiprocessing install on cygwin, fixes #1690

---
 mp_compile.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mp_compile.py b/mp_compile.py
index 078f6247663..8f86f0beed8 100644
--- a/mp_compile.py
+++ b/mp_compile.py
@@ -56,13 +56,14 @@ def install():
 
     fl_pypy3 = hasattr(sys, 'pypy_version_info') and sys.version_info > (3, 0)
     fl_win = sys.platform.startswith('win')
+    fl_cygwin = sys.platform.startswith('cygwin')
 
     if fl_pypy3:
         # see https://github.com/travis-ci/travis-ci/issues/3587
         print("Single threaded build for pypy3")
         return
 
-    if fl_win:
+    if fl_win or fl_cygwin:
         #windows barfs on multiprocessing installs
         print("Single threaded build for windows")
         return