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diff --git a/boost/format/detail/config_macros.hpp b/boost/format/detail/config_macros.hpp
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+++ b/boost/format/detail/config_macros.hpp
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+// -*- C++ -*-
+// ----------------------------------------------------------------------------
+// config_macros.hpp : configuration macros for the format library
+// only BOOST_IO_STD is absolutely needed (it should be 'std::' in general)
+// others are compiler-specific workaround macros used in #ifdef switches
+// ----------------------------------------------------------------------------
+
+//  Copyright Samuel Krempp 2003. Use, modification, and distribution are
+//  subject to 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/format for library home page
+
+
+// ----------------------------------------------------------------------------
+
+#ifndef BOOST_FORMAT_CONFIG_MACROS_HPP
+#define BOOST_FORMAT_CONFIG_MACROS_HPP
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+
+// make sure our local macros wont override something :
+#if defined(BOOST_NO_LOCALE_ISDIGIT) || defined(BOOST_OVERLOAD_FOR_NON_CONST) \
+  || defined(BOOST_IO_STD) || defined( BOOST_IO_NEEDS_USING_DECLARATION ) \
+    || defined(BOOST_NO_TEMPLATE_STD_STREAM) \
+    || defined(BOOST_FORMAT_STREAMBUF_DEFINED) || defined(BOOST_FORMAT_OSTREAM_DEFINED)
+#error "boost::format uses a local macro that is already defined."
+#endif
+
+// specific workarounds. each header can define BOOS_IO_STD if it 
+// needs. (e.g. because of IO_NEEDS_USING_DECLARATION)
+#include <boost/format/detail/workarounds_gcc-2_95.hpp>
+#include <boost/format/detail/workarounds_stlport.hpp>
+
+#ifndef BOOST_IO_STD
+#  define BOOST_IO_STD ::std::
+#endif
+
+#if defined(BOOST_NO_STD_LOCALE) || \
+ ( BOOST_WORKAROUND(__BORLANDC__, <= 0x564) \
+   || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT( 0x570 ) )  )
+// some future __BORLANDC__ >0x564  versions might not need this
+// 0x570 is Borland's kylix branch
+#define BOOST_NO_LOCALE_ISDIGIT
+#endif
+
+#if  BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570) ) || BOOST_WORKAROUND( BOOST_MSVC, BOOST_TESTED_AT(1300))
+#define BOOST_NO_OVERLOAD_FOR_NON_CONST
+#endif
+
+// gcc-2.95's native stringstream is not usable
+#if BOOST_WORKAROUND(__GNUC__, < 3) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
+#define BOOST_FORMAT_IGNORE_STRINGSTREAM  
+#endif
+
+
+// **** Workaround for io streams, stlport and msvc.
+#ifdef BOOST_IO_NEEDS_USING_DECLARATION
+namespace boost {
+  using std::char_traits;
+  using std::basic_ostream;
+  namespace io {
+    using std::basic_ostream;
+    namespace detail {
+      using std::basic_ios;
+      using std::basic_ostream;
+    }
+  }
+#if ! defined(BOOST_NO_STD_LOCALE)
+    using std::locale;
+    namespace io {
+        using std::locale;
+        namespace detail {
+            using std::locale;
+        }
+    }
+#endif // locale
+}
+  // -end N.S. boost
+#endif // needs_using_declaration
+
+
+// ***  hide std::locale if it doesnt exist. 
+// this typedef is either std::locale or int, avoids placing ifdefs everywhere
+namespace boost { namespace io { namespace detail {
+#if ! defined(BOOST_NO_STD_LOCALE)
+    typedef BOOST_IO_STD locale locale_t;
+#else 
+    typedef int          locale_t;
+#endif
+} } }
+
+
+// ----------------------------------------------------------------------------
+
+#endif // BOOST_FORMAT_MACROS_DEFAULT_HPP