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

depends/x86_64-pc-linux-gnu/include/boost/python/ptr.hpp

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+#ifndef PTR_DWA20020601_HPP
+# define PTR_DWA20020601_HPP
+
+# include <boost/python/detail/prefix.hpp>
+// Copyright David Abrahams 2002.
+// 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)
+//
+// Based on boost/ref.hpp, thus:
+//  Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
+//  Copyright (C) 2001 Peter Dimov
+
+# pragma once
+
+# include <boost/config.hpp>
+# include <boost/mpl/bool.hpp>
+
+namespace boost { namespace python {
+
+template<class Ptr> class pointer_wrapper
+{ 
+ public:
+    typedef Ptr type;
+    
+    explicit pointer_wrapper(Ptr x): p_(x) {}
+    operator Ptr() const { return p_; }
+    Ptr get() const { return p_; }
+ private:
+    Ptr p_;
+};
+
+template<class T>
+inline pointer_wrapper<T> ptr(T t)
+{ 
+    return pointer_wrapper<T>(t);
+}
+
+template<typename T>
+class is_pointer_wrapper
+    : public mpl::false_
+{
+};
+
+template<typename T>
+class is_pointer_wrapper<pointer_wrapper<T> >
+    : public mpl::true_
+{
+};
+
+template<typename T>
+class unwrap_pointer
+{
+ public:
+    typedef T type;
+};
+
+template<typename T>
+class unwrap_pointer<pointer_wrapper<T> >
+{
+ public:
+    typedef T type;
+};
+
+}} // namespace boost::python
+
+#endif // #ifndef PTR_DWA20020601_HPP