In common.h, define func_lib for function objects. In configure.ac, define HAVE_STD_FUNCTION and HAVE_BOOST_FUNCTION. Include function headers in ndnboost.
diff --git a/ndnboost/mpl/aux_/size_impl.hpp b/ndnboost/mpl/aux_/size_impl.hpp
new file mode 100644
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--- /dev/null
+++ b/ndnboost/mpl/aux_/size_impl.hpp
@@ -0,0 +1,52 @@
+
+#ifndef BOOST_MPL_AUX_SIZE_IMPL_HPP_INCLUDED
+#define BOOST_MPL_AUX_SIZE_IMPL_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id: size_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
+// $Revision: 49267 $
+
+#include <ndnboost/mpl/size_fwd.hpp>
+#include <ndnboost/mpl/begin_end.hpp>
+#include <ndnboost/mpl/distance.hpp>
+#include <ndnboost/mpl/aux_/traits_lambda_spec.hpp>
+#include <ndnboost/mpl/aux_/config/workaround.hpp>
+
+namespace ndnboost { namespace mpl {
+
+// default implementation; conrete sequences might override it by
+// specializing either the 'size_impl' or the primary 'size' template
+
+template< typename Tag >
+struct size_impl
+{
+ template< typename Sequence > struct apply
+#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561))
+ : distance<
+ typename begin<Sequence>::type
+ , typename end<Sequence>::type
+ >
+ {
+#else
+ {
+ typedef typename distance<
+ typename begin<Sequence>::type
+ , typename end<Sequence>::type
+ >::type type;
+#endif
+ };
+};
+
+BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1, size_impl)
+
+}}
+
+#endif // BOOST_MPL_AUX_SIZE_IMPL_HPP_INCLUDED