ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/detail/add_facet.hpp b/include/ndnboost/iostreams/detail/add_facet.hpp
new file mode 100644
index 0000000..32aa534
--- /dev/null
+++ b/include/ndnboost/iostreams/detail/add_facet.hpp
@@ -0,0 +1,49 @@
+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2003-2007 Jonathan Turkanis
+// 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/iostreams for documentation.
+
+// Borrowed from <ndnboost/archive/add_facet.hpp>
+
+#ifndef NDNBOOST_IOSTREAMS_DETAIL_ADD_FACET_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_DETAIL_ADD_FACET_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <ndnboost/config.hpp> // NDNBOOST_DINKUMWARE_STDLIB.
+#include <ndnboost/detail/workaround.hpp>
+
+//------------------Definition of add_facet-----------------------------------//
+
+// Does STLport uses old Dinkumware locale?
+#if (defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)) && \
+ defined(_STLP_NO_OWN_IOSTREAMS) \
+ /**/
+# if (defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)
+# define NDNBOOST_IOSTREMS_STLPORT_WITH_OLD_DINKUMWARE
+# endif
+#endif
+
+namespace ndnboost { namespace iostreams { namespace detail {
+
+template<class Facet>
+inline std::locale add_facet(const std::locale &l, Facet * f)
+{
+ return
+ #if NDNBOOST_WORKAROUND(NDNBOOST_DINKUMWARE_STDLIB, == 1) || \
+ defined(NDNBOOST_IOSTREMS_STLPORT_WITH_OLD_DINKUMWARE) \
+ /**/
+ std::locale(std::_Addfac(l, f));
+ #else
+ // standard compatible
+ std::locale(l, f);
+ #endif
+}
+
+} } } // End namespaces detail, iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_DETAIL_ADD_FACET_HPP_INCLUDED