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diff --git a/src/third_party/boost-1.69.0/boost/iostreams/detail/config/wide_streams.hpp b/src/third_party/boost-1.69.0/boost/iostreams/detail/config/wide_streams.hpp
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+++ b/src/third_party/boost-1.69.0/boost/iostreams/detail/config/wide_streams.hpp
@@ -0,0 +1,54 @@
+// (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.
+
+// Adapted from http://www.boost.org/more/separate_compilation.html, by
+// John Maddock.
+
+#ifndef BOOST_IOSTREAMS_DETAIL_CONFIG_WIDE_STREAMS_HPP_INCLUDED
+#define BOOST_IOSTREAMS_DETAIL_CONFIG_WIDE_STREAMS_HPP_INCLUDED
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+#include <cstddef>
+
+#if defined(_MSC_VER)
+# pragma once
+#endif       
+
+//------------------Templated stream support----------------------------------//
+
+// From boost/dynamic_bitset.hpp; thanks to Matthias Troyer for cray patch.
+#ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES
+# if defined(__STL_CONFIG_H) && \
+    !defined (__STL_USE_NEW_IOSTREAMS) && !defined(__crayx1) \
+    /**/
+#  define BOOST_IOSTREAMS_NO_STREAM_TEMPLATES
+# endif
+#endif // #ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES
+
+//------------------Wide stream support---------------------------------------//
+
+#ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS
+# if defined(BOOST_IOSTREAMS_NO_STREAM_TEMPLATES) || \
+     defined (BOOST_NO_STD_WSTREAMBUF) && \
+     ( !defined(__MSL_CPP__) || defined(_MSL_NO_WCHART_CPP_SUPPORT) ) \
+     /**/
+#  define BOOST_IOSTREAMS_NO_WIDE_STREAMS
+# endif
+#endif // #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS   
+
+//------------------Locale support--------------------------------------------//
+
+#ifndef BOOST_IOSTREAMS_NO_LOCALE
+# if defined(BOOST_NO_STD_LOCALE) && \
+     ( !defined(__MSL_CPP__) || defined(_MSL_NO_WCHART_CPP_SUPPORT) ) \
+     /**/
+#  define BOOST_IOSTREAMS_NO_LOCALE
+# endif
+#endif // #ifndef BOOST_IOSTREAMS_NO_LOCALE
+
+#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CONFIG_WIDE_STREAMS_HPP_INCLUDED