From 82b3abf93e3287c362721227b747bcaf4fcb5306 Mon Sep 17 00:00:00 2001
From: David Chisnall <David.Chisnall@cl.cam.ac.uk>
Date: Mon, 25 Dec 2017 09:29:25 +0000
Subject: [PATCH] Fix test warning on GNU platforms.

---
 Test/objc_msgSend.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Test/objc_msgSend.m b/Test/objc_msgSend.m
index 612734d..f9b82aa 100644
--- a/Test/objc_msgSend.m
+++ b/Test/objc_msgSend.m
@@ -1,3 +1,5 @@
+// Needed with glibc to expose vasprintf
+#define _GNU_SOURCE
 #include <time.h>
 #include <stdio.h>
 #include <assert.h>