From 0c938cd9ffe5734c6550655063166ae940b6bb3c Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Thu, 26 Oct 2017 18:05:36 +0100
Subject: [PATCH] Regex: Apply fix for clang on Windows, see:
 https://github.com/boostorg/regex/issues/44

---
 include/boost/regex/config.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/regex/config.hpp b/include/boost/regex/config.hpp
index 589b1e3a..eb998110 100644
--- a/include/boost/regex/config.hpp
+++ b/include/boost/regex/config.hpp
@@ -163,7 +163,7 @@
 #  define BOOST_REGEX_NO_LIB
 #endif
 
-#if defined(__GNUC__) && (defined(_WIN32) || defined(__CYGWIN__))
+#if defined(__GNUC__) && !defined(_MSC_VER) && (defined(_WIN32) || defined(__CYGWIN__))
 /* gcc on win32 has problems if you include <windows.h>
    (sporadically generates bad code). */
 #  define BOOST_REGEX_NO_W32