From e65ec6d1692c2bc905ee9dd58905ed6dc507a9b4 Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Tue, 29 Jun 2010 16:02:13 +0000
Subject: [PATCH] Patch for macro redefinitions. Fixes #4385.

[SVN r63439]
---
 include/boost/config/compiler/gcc.hpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/boost/config/compiler/gcc.hpp b/include/boost/config/compiler/gcc.hpp
index 3ba45ddd..54f1bb98 100644
--- a/include/boost/config/compiler/gcc.hpp
+++ b/include/boost/config/compiler/gcc.hpp
@@ -135,8 +135,12 @@
 //
 #if __GNUC__ * 100 + __GNUC_MINOR__ >= 403
 #  ifndef __GXX_RTTI
-#     define BOOST_NO_TYPEID
-#     define BOOST_NO_RTTI
+#     ifndef BOOST_NO_TYPEID
+#        define BOOST_NO_TYPEID
+#     endif
+#     ifndef BOOST_NO_RTTI
+#        define BOOST_NO_RTTI
+#     endif
 #  endif
 #endif