ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/filesystem/detail/utf8_codecvt_facet.hpp b/include/ndnboost/filesystem/detail/utf8_codecvt_facet.hpp
new file mode 100644
index 0000000..5e8251c
--- /dev/null
+++ b/include/ndnboost/filesystem/detail/utf8_codecvt_facet.hpp
@@ -0,0 +1,24 @@
+// Copyright (c) 2001 Ronald Garcia, Indiana University (garcia@osl.iu.edu)
+// Andrew Lumsdaine, Indiana University (lums@osl.iu.edu).
+
+// Distributed under the Boost Software License, Version 1.0.
+// (See http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef NDNBOOST_FILESYSTEM_UTF8_CODECVT_FACET_HPP
+#define NDNBOOST_FILESYSTEM_UTF8_CODECVT_FACET_HPP
+
+#include <ndnboost/filesystem/config.hpp>
+
+#define NDNBOOST_UTF8_BEGIN_NAMESPACE \
+ namespace ndnboost { namespace filesystem { namespace detail {
+
+#define NDNBOOST_UTF8_END_NAMESPACE }}}
+#define NDNBOOST_UTF8_DECL NDNBOOST_FILESYSTEM_DECL
+
+#include <ndnboost/detail/utf8_codecvt_facet.hpp>
+
+#undef NDNBOOST_UTF8_BEGIN_NAMESPACE
+#undef NDNBOOST_UTF8_END_NAMESPACE
+#undef NDNBOOST_UTF8_DECL
+
+#endif