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

depends/x86_64-pc-linux-gnu/include/boost/context/detail/invoke.hpp

@@ -0,0 +1,50 @@
+
+//          Copyright Oliver Kowalke 2014.
+// 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_CONTEXT_DETAIL_INVOKE_H
+#define BOOST_CONTEXT_DETAIL_INVOKE_H
+
+#include <functional>
+#include <type_traits>
+#include <utility>
+
+#include <boost/config.hpp>
+
+#include <boost/context/detail/config.hpp>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace context {
+namespace detail {
+
+template< typename Fn, typename ... Args >
+typename std::enable_if<
+    std::is_member_pointer< typename std::decay< Fn >::type >::value,
+    typename std::result_of< Fn &&( Args && ... ) >::type
+>::type
+invoke( Fn && fn, Args && ... args) {
+    return std::mem_fn( fn)( std::forward< Args >( args) ... );   
+}
+
+template< typename Fn, typename ... Args >
+typename std::enable_if<
+    ! std::is_member_pointer< typename std::decay< Fn >::type >::value,
+    typename std::result_of< Fn &&( Args && ... ) >::type
+>::type
+invoke( Fn && fn, Args && ... args) {
+    return std::forward< Fn >( fn)( std::forward< Args >( args) ... );
+}
+
+}}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_CONTEXT_DETAIL_INVOKE_H