add boost on mac

macx64/include/boost/tti/detail/dnullptr.hpp

@@ -0,0 +1,22 @@
+
+//  (C) Copyright Edward Diener 2012
+//  Use, modification and distribution are subject to the Boost Software License,
+//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt).
+
+#if !defined(BOOST_TTI_DETAIL_NULLPTR_HPP)
+#define BOOST_TTI_DETAIL_NULLPTR_HPP
+
+#include <boost/config.hpp>
+
+#if defined(BOOST_NO_CXX11_NULLPTR)
+
+#define BOOST_TTI_DETAIL_NULLPTR 0
+
+#else // !BOOST_NO_CXX11_NULLPTR
+
+#define BOOST_TTI_DETAIL_NULLPTR nullptr
+
+#endif // BOOST_NO_CXX11_NULLPTR
+
+#endif // BOOST_TTI_DETAIL_NULLPTR_HPP