From 09c8e5390dbaaaca84b27e99d55e1052f5e8dcef Mon Sep 17 00:00:00 2001
From: Przemyslaw Skibinski <inikep@gmail.com>
Date: Mon, 13 Feb 2017 12:45:53 +0100
Subject: [PATCH] __builtin_bswap requires gcc 4.3+

---
 lib/common/mem.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/common/mem.h b/lib/common/mem.h
index aff044de..1c223fe5 100644
--- a/lib/common/mem.h
+++ b/lib/common/mem.h
@@ -182,7 +182,7 @@ MEM_STATIC U32 MEM_swap32(U32 in)
 {
 #if defined(_MSC_VER)     /* Visual Studio */
     return _byteswap_ulong(in);
-#elif defined (__GNUC__)
+#elif defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)
     return __builtin_bswap32(in);
 #else
     return  ((in << 24) & 0xff000000 ) |
@@ -196,7 +196,7 @@ MEM_STATIC U64 MEM_swap64(U64 in)
 {
 #if defined(_MSC_VER)     /* Visual Studio */
     return _byteswap_uint64(in);
-#elif defined (__GNUC__)
+#elif defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)
     return __builtin_bswap64(in);
 #else
     return  ((in << 56) & 0xff00000000000000ULL) |