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/blank_fwd.hpp b/ndnboost/blank_fwd.hpp
new file mode 100644
index 0000000..fee1d79
--- /dev/null
+++ b/ndnboost/blank_fwd.hpp
@@ -0,0 +1,22 @@
+//-----------------------------------------------------------------------------
+// boost blank_fwd.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2003
+// Eric Friedman
+//
+// 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_BLANK_FWD_HPP
+#define BOOST_BLANK_FWD_HPP
+
+namespace ndnboost {
+
+struct blank;
+
+} // namespace ndnboost
+
+#endif // BOOST_BLANK_FWD_HPP