This product bundles Boost Predef and Boost Preprocessor. They are distributed under 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) For details, see the following files: external/boost/predef include/msgpack/predef.h include/msgpack/predef/* external/boost/preprocessor include/msgpack/preprocessor.hpp include/msgpack/preprocessor/*