diff --git a/include/ndn-cpp/common.hpp b/include/ndn-cpp/common.hpp
new file mode 100644
index 0000000..e9d0c88
--- /dev/null
+++ b/include/ndn-cpp/common.hpp
@@ -0,0 +1,66 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/**
+ * Copyright (C) 2013 Regents of the University of California.
+ * @author: Jeff Thompson <jefft0@remap.ucla.edu>
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NDN_COMMON_HPP
+#define NDN_COMMON_HPP
+
+#include <vector>
+// common.h include ndn-cpp-config.h.
+#include "c/common.h"
+
+// Depending on where ./configure found shared_ptr, define the ptr_lib namespace.
+// We always use ndn::ptr_lib.
+#if NDN_CPP_HAVE_STD_SHARED_PTR
+#include <memory>
+namespace ndn { namespace ptr_lib = std; }
+#elif NDN_CPP_HAVE_BOOST_SHARED_PTR
+#include <boost/shared_ptr.hpp>
+#include <boost/make_shared.hpp>
+namespace ndn { namespace ptr_lib = boost; }
+#else
+// Use the boost header files in this distribution that were extracted with:
+// cd <INCLUDE DIRECTORY WITH boost SUBDIRECTORY>
+// dist/bin/bcp --namespace=ndnboost shared_ptr make_shared weak_ptr function bind <NDN-CPP ROOT>/include
+// cd <NDN-CPP ROOT>/include
+// mv boost ndnboost
+// cd ndnboost
+// (unset LANG; find . -type f -exec sed -i '' 's/\<boost\//\<ndnboost\//g' {} +)
+// (unset LANG; find . -type f -exec sed -i '' 's/\"boost\//\"ndnboost\//g' {} +)
+#include <ndnboost/shared_ptr.hpp>
+#include <ndnboost/make_shared.hpp>
+namespace ndn { namespace ptr_lib = ndnboost; }
+#endif
+
+// Depending on where ./configure found function, define the func_lib namespace.
+// We always use ndn::func_lib.
+#if NDN_CPP_HAVE_STD_FUNCTION
+#include <functional>
+namespace ndn { namespace func_lib = std; }
+#elif NDN_CPP_HAVE_BOOST_FUNCTION
+#include <boost/function.hpp>
+#include <boost/bind.hpp>
+namespace ndn { namespace func_lib = boost; }
+#else
+// Use the boost header files in this distribution that were extracted as above:
+#include <ndnboost/function.hpp>
+#include <ndnboost/bind.hpp>
+namespace ndn { namespace func_lib = ndnboost; }
+#endif
+
+namespace ndn {
+   
+/**
+ * Return the hex representation of the bytes in array.
+ * @param array The array of bytes.
+ * @return Hex string.
+ */
+std::string 
+toHex(const std::vector<uint8_t>& array);
+
+}
+
+#endif