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

depends/x86_64-pc-linux-gnu/include/boost/hana/fwd/greater.hpp

@@ -0,0 +1,53 @@
+/*!
+@file
+Forward declares `boost::hana::greater`.
+
+@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_GREATER_HPP
+#define BOOST_HANA_FWD_GREATER_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+#include <boost/hana/detail/nested_than_fwd.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! Returns a `Logical` representing whether `x` is greater than `y`.
+    //! @ingroup group-Orderable
+    //!
+    //!
+    //! Signature
+    //! ---------
+    //! Given a Logical `Bool` and two Orderables `A` and `B` with a common
+    //! embedding, the signature is
+    //! @f$ \mathrm{greater} : A \times B \to Bool @f$.
+    //!
+    //! @param x, y
+    //! Two objects to compare.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/greater.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto greater = [](auto&& x, auto&& y) -> decltype(auto) {
+        return tag-dispatched;
+    };
+#else
+    template <typename T, typename U, typename = void>
+    struct greater_impl : greater_impl<T, U, when<true>> { };
+
+    struct greater_t : detail::nested_than<greater_t> {
+        template <typename X, typename Y>
+        constexpr decltype(auto) operator()(X&& x, Y&& y) const;
+    };
+
+    constexpr greater_t greater{};
+#endif
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_FWD_GREATER_HPP