From 4fcd9d708fadb1ecef373eb6d5c7d2883b0d1419 Mon Sep 17 00:00:00 2001
From: duerst <duerst@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 5 Sep 2018 06:04:02 +0000
Subject: define ubf_list_atfork() as empty on cygwin

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64635 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 thread_pthread.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/thread_pthread.c b/thread_pthread.c
index f5107bd7af..7f57435698 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1380,6 +1380,7 @@ ubf_wakeup_all_threads(void)
 #define ubf_select 0
 static void ubf_wakeup_all_threads(void) { return; }
 static int ubf_threads_empty(void) { return 1; }
+#define ubf_list_atfork() do {} while (0)
 #endif /* USE_UBF_LIST */
 
 #define TT_DEBUG 0
-- 
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