From e8f9424ec59655f2ef84144d61514f7eaa3dc966 Mon Sep 17 00:00:00 2001
From: Michel Morin <mimomorin@gmail.com>
Date: Sat, 19 May 2012 12:20:31 +0000
Subject: [PATCH] Fix clang's config: * `typeid` is useless when `-fno-rtti` is
 turned on. * Protect `BOOST_NO_RTTI` and `BOOST_NO_TYPEID` from redefinition,
 as done for `BOOST_NO_EXCEPTIONS`.

[SVN r78510]
---
 include/boost/config/compiler/clang.hpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/boost/config/compiler/clang.hpp b/include/boost/config/compiler/clang.hpp
index 976a92c0..1067a800 100644
--- a/include/boost/config/compiler/clang.hpp
+++ b/include/boost/config/compiler/clang.hpp
@@ -12,10 +12,14 @@
 #  define BOOST_NO_EXCEPTIONS
 #endif
 
-#if !__has_feature(cxx_rtti)
+#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI)
 #  define BOOST_NO_RTTI
 #endif
 
+#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID)
+#  define BOOST_NO_TYPEID
+#endif
+
 #if defined(__int64)
 #  define BOOST_HAS_MS_INT64
 #endif