From a716a2474b71d4290763986cfd5f1cde0ccb5080 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 20 May 2016 14:24:39 +0000
Subject: thread_pthread.c: no fork, no gvl_atfork

* thread_pthread.c (gvl_atfork): used in rb_thread_atfork_internal
  only if HAVE_WORKING_FORK is defined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55085 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 thread_pthread.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/thread_pthread.c b/thread_pthread.c
index 0f62c6d603..b8be9bddc5 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -181,12 +181,14 @@ gvl_destroy(rb_vm_t *vm)
     native_mutex_destroy(&vm->gvl.lock);
 }
 
+#if defined(HAVE_WORKING_FORK)
 static void
 gvl_atfork(rb_vm_t *vm)
 {
     gvl_init(vm);
     gvl_acquire(vm, GET_THREAD());
 }
+#endif
 
 #define NATIVE_MUTEX_LOCK_DEBUG 0
 
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