From f05ff6b8ea6a30237d61cd2db87be62786eeb7aa Mon Sep 17 00:00:00 2001
From: Rocky Liu <rockyliu@fb.com>
Date: Tue, 13 May 2014 14:35:37 -0700
Subject: [PATCH] Always #define _GNU_SOURCE to pull in pipe2() declarations

Summary: [folly::Subprocess] Always #define _GNU_SOURCE to pull in pipe2() declarations

Test Plan: Compile

Reviewed By: tudorb@fb.com

FB internal diff: D1327004
---
 folly/Subprocess.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/folly/Subprocess.cpp b/folly/Subprocess.cpp
index 3f25f7ff..54f614b5 100644
--- a/folly/Subprocess.cpp
+++ b/folly/Subprocess.cpp
@@ -21,6 +21,10 @@
 #endif
 #include <fcntl.h>
 #include <poll.h>
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
 #include <unistd.h>
 
 #include <array>
-- 
2.34.1