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.
// boost/filesystem/filesystem.hpp -----------------------------------------//
// Copyright Beman Dawes 2005
// Use, modification, and distribution is 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)
// See library home page at http://www.boost.org/libs/filesystem
//----------------------------------------------------------------------------//
#ifndef BOOST_FILESYSTEM_FILESYSTEM_HPP
#define BOOST_FILESYSTEM_FILESYSTEM_HPP
#include <boost/filesystem/operations.hpp> // includes path.hpp
#include <boost/filesystem/convenience.hpp>
#endif