Commented out export of missing CRML source file to avoid build error.
There are no known side effects of this file being missing, so this seems a reasonable way to avoid the build error.
// --------------------------------------------------
//
// (C) Copyright Chuck Allison and Jeremy Siek 2001 - 2002.
// (C) Copyright Gennaro Prota 2003 - 2004.
//
// 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)
//
// -----------------------------------------------------------
// See http://www.boost.org/libs/dynamic_bitset for documentation.
#ifndef BOOST_DYNAMIC_BITSET_HPP
#define BOOST_DYNAMIC_BITSET_HPP
#include "boost/dynamic_bitset/dynamic_bitset.hpp"
#endif // include guard