-#include <boost/thread.hpp>
+// Copyright (C) 2010 Vicente Botet
+//
+// 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)
+
+#define BOOST_THREAD_VERSION 2
+
+#include <boost/thread/thread_only.hpp>
+#include <boost/thread/future.hpp>
int calculate_the_answer_to_life_the_universe_and_everything()
{