From e1d9c0281a8a8def3d0facc02dc8a049e31cf09f Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Tue, 19 May 2009 11:39:24 +0000
Subject: [PATCH] Fixes #3047.

[SVN r53107]
---
 include/boost/config/compiler/visualc.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index b5fe76cf..e3dfaaae 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -131,10 +131,10 @@
 // disable Win32 API's if compiler extentions are
 // turned off:
 //
-#ifndef _MSC_EXTENSIONS
+#if !defined(_MSC_EXTENSIONS) && !defined(BOOST_DISABLE_WIN32)
 #  define BOOST_DISABLE_WIN32
 #endif
-#ifndef _CPPRTTI
+#if !defined(_CPPRTTI) && !defined(BOOST_NO_RTTI)
 #  define BOOST_NO_RTTI
 #endif