From 5367f6459d7ab55892c1ea67267ac0592c19686e Mon Sep 17 00:00:00 2001
From: Christopher Jefferson <chris@bubblescope.net>
Date: Mon, 14 Feb 2011 10:27:38 +0000
Subject: [PATCH] libc++ also has no const on codecvt length

[SVN r68859]
---
 include/boost/detail/utf8_codecvt_facet.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/detail/utf8_codecvt_facet.hpp b/include/boost/detail/utf8_codecvt_facet.hpp
index b777ff9..65c5e4e 100644
--- a/include/boost/detail/utf8_codecvt_facet.hpp
+++ b/include/boost/detail/utf8_codecvt_facet.hpp
@@ -92,7 +92,8 @@ namespace std {
 }
 #endif
 
-#if !defined(__MSL_CPP__) && !defined(__LIBCOMO__)
+#if !defined(__MSL_CPP__) && !defined(__LIBCOMO__) \
+    && !defined(_LIBCPP_VERSION)
     #define BOOST_CODECVT_DO_LENGTH_CONST const
 #else
     #define BOOST_CODECVT_DO_LENGTH_CONST