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

depends/x86_64-pc-linux-gnu/include/boost/geometry/util/condition.hpp

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+// Boost.Geometry
+
+// Copyright (c) 2015 Oracle and/or its affiliates.
+
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
+
+// 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)
+
+#ifndef BOOST_GEOMETRY_UTIL_CONDITION_HPP
+#define BOOST_GEOMETRY_UTIL_CONDITION_HPP
+
+
+#include <boost/config.hpp>
+
+
+// The macro defined in this file allows to suppress the MSVC
+// compiler warning C4127: conditional expression is constant
+
+#ifdef BOOST_MSVC
+
+// NOTE: The code commented out below contains an alternative implementation
+// of a macro using a free function. It was left here in case if in the future
+// version of MSVC for the code currently used in the macro implementation
+// the warning was generated.
+
+//#ifndef DOXYGEN_NO_DETAIL
+//namespace boost { namespace geometry { namespace detail {
+//BOOST_FORCEINLINE bool condition(bool const b) { return b; }
+//}}} // boost::geometry::detail
+//#endif // DOXYGEN_NO_DETAIL
+//#define BOOST_GEOMETRY_CONDITION(CONDITION) boost::geometry::detail::condition(CONDITION)
+
+#define BOOST_GEOMETRY_CONDITION(CONDITION) ((void)0, (CONDITION))
+
+#else
+
+#define BOOST_GEOMETRY_CONDITION(CONDITION) (CONDITION)
+
+#endif
+
+
+#endif // BOOST_GEOMETRY_UTIL_CONDITION_HPP