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/libs/functional/hash/examples/books.hpp b/libs/functional/hash/examples/books.hpp
new file mode 100644
index 0000000..195a798
--- /dev/null
+++ b/libs/functional/hash/examples/books.hpp
@@ -0,0 +1,26 @@
+
+// Copyright 2005-2009 Daniel James.
+// 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)
+
+// This example illustrates how to use ndnboost::hash with a custom hash function.
+// The implementation is contained in books.cpp
+
+#include <cstddef>
+#include <string>
+
+namespace library
+{
+ struct book
+ {
+ int id;
+ std::string author;
+ std::string title;
+
+ book(int i, std::string const& a, std::string const& t)
+ : id(i), author(a), title(t) {}
+ };
+
+ bool operator==(book const&, book const&);
+ std::size_t hash_value(book const&);
+}