From ec0f074f2dd9563a92dfaa647888790ae44205d5 Mon Sep 17 00:00:00 2001
From: jsteube <jens.steube@gmail.com>
Date: Sat, 21 Jan 2017 18:14:44 +0100
Subject: [PATCH] Fix travis-ci error caused by missing __builtin_bswap16()

---
 src/bitops.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/bitops.c b/src/bitops.c
index d40904731..adb571a23 100644
--- a/src/bitops.c
+++ b/src/bitops.c
@@ -45,7 +45,10 @@ u64 rotr64 (const u64 a, const u64 n)
 
 u16 byte_swap_16 (const u16 n)
 {
-  #if defined (_MSC_VER)
+  #if defined(__APPLE__)
+  return (n & 0xff00) >> 8
+       | (n & 0x00ff) << 8;
+  #elif defined (_MSC_VER)
   return _byteswap_ushort (n);
   #elif defined (__clang__) || defined (__GNUC__)
   return __builtin_bswap16 (n);