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

depends/x86_64-pc-linux-gnu/include/boost/fiber/detail/spinlock.hpp

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+
+//          Copyright Oliver Kowalke 2013.
+// 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_FIBERS_SPINLOCK_H
+#define BOOST_FIBERS_SPINLOCK_H
+
+#include <boost/config.hpp>
+
+#include <boost/fiber/detail/config.hpp>
+
+#if !defined(BOOST_FIBERS_NO_ATOMICS) 
+# include <mutex>
+# include <boost/fiber/detail/spinlock_ttas.hpp>
+# include <boost/fiber/detail/spinlock_ttas_adaptive.hpp>
+# if defined(BOOST_FIBERS_HAS_FUTEX)
+#  include <boost/fiber/detail/spinlock_ttas_futex.hpp>
+#  include <boost/fiber/detail/spinlock_ttas_adaptive_futex.hpp>
+# endif
+#endif
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace fibers {
+namespace detail {
+
+#if defined(BOOST_FIBERS_NO_ATOMICS) 
+struct spinlock {
+    constexpr spinlock() noexcept {}
+    void lock() noexcept {}
+    void unlock() noexcept {}
+};
+
+struct spinlock_lock {
+    constexpr spinlock_lock( spinlock &) noexcept {}
+    void lock() noexcept {}
+    void unlock() noexcept {}
+};
+#else
+# if defined(BOOST_FIBERS_SPINLOCK_STD_MUTEX) 
+using spinlock = std::mutex;
+# elif defined(BOOST_FIBERS_SPINLOCK_TTAS_FUTEX)
+using spinlock = spinlock_ttas_futex;
+# elif defined(BOOST_FIBERS_SPINLOCK_TTAS_ADAPTIVE_FUTEX)
+using spinlock = spinlock_ttas_adaptive_futex;
+# elif defined(BOOST_FIBERS_SPINLOCK_TTAS_ADAPTIVE) 
+using spinlock = spinlock_ttas_adaptive;
+# else
+using spinlock = spinlock_ttas;
+# endif
+using spinlock_lock = std::unique_lock< spinlock >;
+#endif
+
+}}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_FIBERS_SPINLOCK_H