From 3f0d49a6029208444bdc930ea3bb6f4fb6f7795f Mon Sep 17 00:00:00 2001
From: Christopher Baker <me@christopherbaker.net>
Date: Mon, 21 Jul 2014 12:29:38 -0500
Subject: [PATCH] Make sure AvailabilityMacros.h is included for build systems
 that do not include it by default. - Required for macros such as
 MAC_OS_X_VERSION_10_3, MAC_OS_X_VERSION_MIN_REQUIRED, etc.

---
 src/impl/unix.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/impl/unix.cc b/src/impl/unix.cc
index 6c1dbe4..3cfb077 100755
--- a/src/impl/unix.cc
+++ b/src/impl/unix.cc
@@ -27,6 +27,7 @@
 #include <sys/time.h>
 #include <time.h>
 #ifdef __MACH__
+#include <AvailabilityMacros.h>
 #include <mach/clock.h>
 #include <mach/mach.h>
 #endif