From 95d26bb0e658614f6770f9510815c49c37c0b3c2 Mon Sep 17 00:00:00 2001
From: "Roger A. Light" <roger@atchoo.org>
Date: Wed, 2 May 2018 11:50:47 +0100
Subject: [PATCH] Fix build warnings on Mac.

---
 config.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/config.h b/config.h
index 99915f4b..906fad48 100644
--- a/config.h
+++ b/config.h
@@ -9,8 +9,6 @@
 
 /* ============================================================
  * Compatibility defines
- *
- * Generally for Windows native support.
  * ============================================================ */
 #if defined(_MSC_VER) && _MSC_VER < 1900
 #  define snprintf sprintf_s
@@ -29,7 +27,11 @@
 #define uthash_malloc(sz) mosquitto__malloc(sz)
 #define uthash_free(ptr,sz) mosquitto__free(ptr)
 
-#define _DEFAULT_SOURCE 1
-#define _POSIX_C_SOURCE 200809L
+#ifdef __APPLE__
+#  define __DARWIN_C_SOURCE
+#else
+#  define _DEFAULT_SOURCE 1
+#  define _POSIX_C_SOURCE 200809L
+#endif
 
 #endif