From 3f7acfe743f55738cf025ed2438a5800895b189e Mon Sep 17 00:00:00 2001
From: Lubos Dolezel <lubos@dolezel.info>
Date: Tue, 28 Feb 2017 17:51:22 +0100
Subject: [PATCH] Fix a compiler warning

---
 Block_private.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Block_private.h b/Block_private.h
index 23797bb..c3e80a6 100644
--- a/Block_private.h
+++ b/Block_private.h
@@ -11,7 +11,10 @@
 
 #ifndef _BLOCK_PRIVATE_H_
 #define _BLOCK_PRIVATE_H_
-#define BLOCK_EXPORT
+
+#ifndef BLOCK_EXPORT
+#define BLOCK_EXPORT extern
+#endif
 
 #include <Availability.h>
 #include <AvailabilityMacros.h>