stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork

depends/x86_64-pc-linux-gnu/include/boost/asio/deadline_timer.hpp

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+//
+// deadline_timer.hpp
+// ~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2017 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_DEADLINE_TIMER_HPP
+#define BOOST_ASIO_DEADLINE_TIMER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME) \
+  || defined(GENERATING_DOCUMENTATION)
+
+#include <boost/asio/detail/socket_types.hpp> // Must come before posix_time.
+#include <boost/asio/basic_deadline_timer.hpp>
+
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+
+namespace boost {
+namespace asio {
+
+/// Typedef for the typical usage of timer. Uses a UTC clock.
+typedef basic_deadline_timer<boost::posix_time::ptime> deadline_timer;
+
+} // namespace asio
+} // namespace boost
+
+#endif // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
+       // || defined(GENERATING_DOCUMENTATION)
+
+#endif // BOOST_ASIO_DEADLINE_TIMER_HPP