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

depends/x86_64-pc-linux-gnu/include/boost/process/detail/handler_base.hpp

@@ -0,0 +1,49 @@
+// Copyright (c) 2006, 2007 Julio M. Merino Vidal
+// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
+// Copyright (c) 2009 Boris Schaeling
+// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
+// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
+// Copyright (c) 2016 Klemens D. Morgenstern
+//
+// 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_PROCESS_DETAIL_HANDLER_BASE_HPP
+#define BOOST_PROCESS_DETAIL_HANDLER_BASE_HPP
+
+#include <system_error>
+
+namespace boost { namespace process { namespace detail {
+
+template<template <class> class Template>
+struct make_handler_t
+{
+    constexpr make_handler_t() {}
+    template<typename Handler>
+    constexpr Template<Handler> operator()(Handler handler) const {return Template<Handler>(handler);}
+    template<typename Handler>
+    constexpr Template<Handler> operator= (Handler handler) const {return Template<Handler>(handler);}
+    template<typename Handler>
+    constexpr Template<Handler> operator+=(Handler handler) const {return Template<Handler>(handler);}
+};
+
+
+struct handler_base
+{
+    using resource_type = void;
+
+    template <class Executor>
+    void on_setup(Executor&) const {}
+
+    template <class Executor>
+    void on_error(Executor&, const std::error_code &) const {}
+
+    template <class Executor>
+    void on_success(Executor&) const {}
+
+};
+
+
+}}}
+
+#endif