From: Joergen Ibsen <ji@ibse.dk>
Date: Mon, 13 Jun 2016 11:01:18 +0000 (+0200)
Subject: Do not define __builtin_ctzl for Clang on MSVC
X-Git-Tag: 1.9.9-b1~771^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F70%2Fhead;p=thirdparty%2Fzlib-ng.git

Do not define __builtin_ctzl for Clang on MSVC

Clang targeting MSVC and Clang/C2 provide __builtin_ctzl.
---

diff --git a/match.c b/match.c
index ea425614..25b3b14c 100644
--- a/match.c
+++ b/match.c
@@ -28,7 +28,7 @@
 #endif
 
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 #include <intrin.h>
 /* This is not a general purpose replacement for __builtin_ctzl. The function expects that value is != 0
  * Because of that assumption trailing_zero is not initialized and the return value of _BitScanForward is not checked