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

depends/x86_64-pc-linux-gnu/include/boost/hana/fwd/not.hpp

@@ -0,0 +1,47 @@
+/*!
+@file
+Forward declares `boost::hana::not_`.
+
+@copyright Louis Dionne 2013-2017
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+ */
+
+#ifndef BOOST_HANA_FWD_NOT_HPP
+#define BOOST_HANA_FWD_NOT_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! Negates a `Logical`.
+    //! @ingroup group-Logical
+    //!
+    //! This method returns a `Logical` with the same tag, but whose
+    //! truth-value is negated. Specifically, `not_(x)` returns a false-valued
+    //! `Logical` if `x` is a true-valued `Logical`, and a true-valued one
+    //! otherwise.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/not.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto not_ = [](auto&& x) -> decltype(auto) {
+        return tag-dispatched;
+    };
+#else
+    template <typename L, typename = void>
+    struct not_impl : not_impl<L, when<true>> { };
+
+    struct not_t {
+        template <typename X>
+        constexpr decltype(auto) operator()(X&& x) const;
+    };
+
+    constexpr not_t not_{};
+#endif
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_FWD_NOT_HPP