From c51d9c169e248d4231805f93ee32393974ac44d0 Mon Sep 17 00:00:00 2001
From: Stanley Cheung <stanleycheung@google.com>
Date: Tue, 20 Nov 2018 15:21:29 -0800
Subject: Wrap pthread_atwork call

---
 src/php/ext/grpc/php_grpc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/php/ext/grpc/php_grpc.c b/src/php/ext/grpc/php_grpc.c
index cbc7f63be0..492325b1e8 100644
--- a/src/php/ext/grpc/php_grpc.c
+++ b/src/php/ext/grpc/php_grpc.c
@@ -200,7 +200,9 @@ void postfork_parent() {
 
 void register_fork_handlers() {
   if (getenv("GRPC_ENABLE_FORK_SUPPORT")) {
+#ifdef GRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK
     pthread_atfork(&prefork, &postfork_parent, &postfork_child);
+#endif  // GRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK
   }
 }
 
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