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/is_sequence.hpp b/ndnboost/mpl/is_sequence.hpp
new file mode 100644
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+++ b/ndnboost/mpl/is_sequence.hpp
@@ -0,0 +1,112 @@
+
+#ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
+#define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2002-2004
+//
+// 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: is_sequence.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/not.hpp>
+#include <ndnboost/mpl/and.hpp>
+#include <ndnboost/mpl/begin_end.hpp>
+#include <ndnboost/mpl/if.hpp>
+#include <ndnboost/mpl/bool.hpp>
+#include <ndnboost/mpl/sequence_tag_fwd.hpp>
+#include <ndnboost/mpl/identity.hpp>
+#include <ndnboost/mpl/void.hpp>
+#include <ndnboost/mpl/aux_/has_tag.hpp>
+#include <ndnboost/mpl/aux_/has_begin.hpp>
+#include <ndnboost/mpl/aux_/na_spec.hpp>
+#include <ndnboost/mpl/aux_/lambda_support.hpp>
+#include <ndnboost/mpl/aux_/config/eti.hpp>
+#include <ndnboost/mpl/aux_/config/msvc.hpp>
+#include <ndnboost/mpl/aux_/config/workaround.hpp>
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+# include <ndnboost/mpl/aux_/msvc_is_class.hpp>
+#elif BOOST_WORKAROUND(BOOST_MSVC, == 1300)
+# include <ndnboost/type_traits/is_class.hpp>
+#endif
+
+#include <ndnboost/type_traits/is_same.hpp>
+
+namespace ndnboost { namespace mpl {
+
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
+
+namespace aux {
+
+// agurt, 11/jun/03:
+// MSVC 6.5/7.0 fails if 'has_begin' is instantiated on a class type that has a
+// 'begin' member that doesn't name a type; e.g. 'has_begin< std::vector<int> >'
+// would fail; requiring 'T' to have _both_ 'tag' and 'begin' members workarounds
+// the issue for most real-world cases
+template< typename T > struct is_sequence_impl
+ : and_<
+ identity< aux::has_tag<T> >
+ , identity< aux::has_begin<T> >
+ >
+{
+};
+
+} // namespace aux
+
+template<
+ typename BOOST_MPL_AUX_NA_PARAM(T)
+ >
+struct is_sequence
+ : if_<
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+ aux::msvc_is_class<T>
+#else
+ ndnboost::is_class<T>
+#endif
+ , aux::is_sequence_impl<T>
+ , bool_<false>
+ >::type
+{
+ BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
+};
+
+#elif defined(BOOST_MPL_CFG_NO_HAS_XXX)
+
+template<
+ typename BOOST_MPL_AUX_NA_PARAM(T)
+ >
+struct is_sequence
+ : bool_<false>
+{
+};
+
+#else
+
+template<
+ typename BOOST_MPL_AUX_NA_PARAM(T)
+ >
+struct is_sequence
+ : not_< is_same< typename begin<T>::type, void_ > >
+{
+ BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
+};
+
+#endif // BOOST_MSVC
+
+#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
+template<> struct is_sequence<int>
+ : bool_<false>
+{
+};
+#endif
+
+BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence)
+
+}}
+
+#endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED