add boost on mac

macx64/include/boost/asio/detail/reactor_fwd.hpp

@@ -0,0 +1,42 @@
+//
+// detail/reactor_fwd.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// 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)
+//
+
+#ifndef BOOST_ASIO_DETAIL_REACTOR_FWD_HPP
+#define BOOST_ASIO_DETAIL_REACTOR_FWD_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+#if defined(BOOST_ASIO_HAS_IOCP) || defined(BOOST_ASIO_WINDOWS_RUNTIME)
+typedef class null_reactor reactor;
+#elif defined(BOOST_ASIO_HAS_IOCP)
+typedef class select_reactor reactor;
+#elif defined(BOOST_ASIO_HAS_EPOLL)
+typedef class epoll_reactor reactor;
+#elif defined(BOOST_ASIO_HAS_KQUEUE)
+typedef class kqueue_reactor reactor;
+#elif defined(BOOST_ASIO_HAS_DEV_POLL)
+typedef class dev_poll_reactor reactor;
+#else
+typedef class select_reactor reactor;
+#endif
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#endif // BOOST_ASIO_DETAIL_REACTOR_FWD_HPP