From 581c459b4ec4bbaae518a0ef9baa552f21f9e24e Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Sat, 14 Nov 2020 14:26:08 -0800
Subject: [PATCH] restrict BitScanForward() to VS2005+

suggested by @aqrit in #947
---
 lib/lz4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/lz4.c b/lib/lz4.c
index 5fe3433..5c6cf4d 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -533,7 +533,7 @@ static unsigned LZ4_NbCommonBytes (reg_t val)
             return (unsigned)(((U64)((val & (m - 1)) * m)) >> 56);
 #       endif
         } else /* 32 bits */ {
-#       if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
+#       if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(LZ4_FORCE_SW_BITCOUNT)
             unsigned long r;
             _BitScanForward(&r, (U32)val);
             return (unsigned)r >> 3;
-- 
2.7.4