From 63ae04461fb0cc93ca57cd151103a8dd295581d6 Mon Sep 17 00:00:00 2001
From: Erik Bray <erik.m.bray@gmail.com>
Date: Fri, 27 Oct 2017 12:01:17 +0200
Subject: [PATCH] Fix _socket module compilation on Cygwin. (#4137)

---
 Modules/socketmodule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 0758f9bd40..6f114efe31 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -234,7 +234,7 @@ http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/net/getaddrinfo.c.diff?r1=1.82&
 # include <ctype.h>
 #endif
 
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__CYGWIN__)
 # include <sys/ioctl.h>
 #endif
 
-- 
2.40.0