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/vector/aux_/size.hpp b/ndnboost/mpl/vector/aux_/size.hpp
new file mode 100644
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--- /dev/null
+++ b/ndnboost/mpl/vector/aux_/size.hpp
@@ -0,0 +1,49 @@
+
+#ifndef BOOST_MPL_VECTOR_AUX_SIZE_HPP_INCLUDED
+#define BOOST_MPL_VECTOR_AUX_SIZE_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.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/vector/aux_/O1_size.hpp>
+#include <ndnboost/mpl/vector/aux_/tag.hpp>
+#include <ndnboost/mpl/aux_/config/typeof.hpp>
+#include <ndnboost/mpl/aux_/config/ctps.hpp>
+
+namespace ndnboost { namespace mpl {
+
+#if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
+
+template<>
+struct size_impl< aux::vector_tag >
+ : O1_size_impl< aux::vector_tag >
+{
+};
+
+#else
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+template< long N >
+struct size_impl< aux::vector_tag<N> >
+ : O1_size_impl< aux::vector_tag<N> >
+{
+};
+
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+#endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
+
+}}
+
+#endif // BOOST_MPL_VECTOR_AUX_SIZE_HPP_INCLUDED