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+// ----------------------------------------------------------------------------
+//  workarounds for gcc < 3.0. 
+// ----------------------------------------------------------------------------
+
+//  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
+
+
+// ----------------------------------------------------------------------------
+
+// There's a lot to do, the stdlib shipped with gcc prior to 3.x 
+// was terribly non-conforming. 
+// . defines macros switches
+// . supplies template classes basic_foo<char,Tr> where gcc only supplies foo.
+//  i.e :
+//     -  basic_ios<char, Tr>        from ios
+//     -  basic_ostream<char, Tr>    from ostream
+//     -  basic_srteambuf<char, Tr>  from streambuf
+// these can be used transparently. (it obviously does not work for wchar_t)
+// . specialise CompatAlloc and CompatTraits to wrap gcc-2.95's 
+//    string_char_traits and std::alloc 
+
+#if  BOOST_WORKAROUND(__GNUC__, < 3) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
+   // only for gcc-2.95's native stdlib
+
+#ifndef BOOST_FORMAT_WORKAROUNDS_GCC295_H
+#define BOOST_FORMAT_WORKAROUNDS_GCC295_H
+
+// SGI STL doesnt have <ostream> and others, so we need iostream.
+#include <iostream> 
+#define BOOST_FORMAT_OSTREAM_DEFINED
+
+#include <streambuf.h>
+#define BOOST_FORMAT_STREAMBUF_DEFINED
+
+#define BOOST_NO_TEMPLATE_STD_STREAM
+
+#ifndef BOOST_IO_STD
+#  define BOOST_IO_STD std::
+#endif
+
+
+
+// *** 
+// gcc's simple classes turned into standard-like template classes :
+
+namespace std {
+
+
+    // gcc has string_char_traits, it's incomplete.
+    // we declare a std::char_traits, and specialize CompatTraits<..> on it
+    // to do what is required
+    template<class Ch>
+    class char_traits; // no definition here, we will just use it as a tag.
+
+    template <class Ch, class Tr>
+    class basic_streambuf;
+
+    template <class Tr> 
+    class basic_streambuf<char, Tr> : public streambuf {
+    };
+
+    template <class Ch, class Tr=::std::char_traits<Ch> >
+    class basic_ios;
+
+    template <class Tr>
+    class basic_ios<char, Tr> : public ostream {
+    public:
+        basic_ios(streambuf * p) : ostream(p) {};
+         char fill()  const { return ios::fill(); } // gcc returns wchar..
+         char fill(char c)  { return ios::fill(c); } // gcc takes wchar..
+         char widen(char c) { return c; }
+         char narrow(char c, char def) { return c; }
+        basic_ios& copyfmt(const ios& right) {
+            fill(right.fill());
+            flags(right.flags() );
+            exceptions(right.exceptions());
+            width(right.width());
+            precision(right.precision());
+            return *this;
+        }
+     };
+
+
+    typedef ios ios_base;
+
+    template <class Ch, class Tr>
+    class basic_ostream;
+
+     template <class Tr> 
+     class basic_ostream<char, Tr> : public basic_ios<char, Tr>
+     {
+     public:
+         basic_ostream(streambuf * p) : basic_ios<char,Tr> (p) {}
+     };
+
+} // namespace std
+
+
+namespace boost {
+    namespace io {
+
+
+        // ** CompatTraits gcc2.95 specialisations ----------------------------
+        template<class Ch>
+        class CompatTraits< ::std::string_char_traits<Ch> >
+            : public ::std::string_char_traits<Ch> 
+        {
+        public:
+            typedef CompatTraits                compatible_type;
+
+            typedef Ch char_type;
+            typedef int int_type;
+            typedef ::std::streampos pos_type;
+            typedef ::std::streamoff off_type;
+        
+            static char_type 
+            to_char_type(const int_type& meta) {
+                return static_cast<char_type>(meta); }
+            static int_type 
+            to_int_type(const char_type& ch) {
+                return static_cast<int_type>(static_cast<unsigned char>(ch) );}
+            static bool 
+            eq_int_type(const int_type& left, const int_type& right) {
+                return left == right; }
+            static int_type 
+            eof() {
+                return static_cast<int_type>(EOF);
+            }
+            static int_type 
+            not_eof(const int_type& meta) {
+                return (meta == eof()) ? 0 : meta;
+            }
+        };
+
+        template<class Ch>
+        class CompatTraits< ::std::char_traits<Ch> > {
+        public:
+            typedef CompatTraits< ::std::string_char_traits<Ch> >  compatible_type;
+        };
+
+        // ** CompatAlloc gcc-2.95  specialisations ---------------------------
+        template<>
+        class CompatAlloc< ::std::alloc>
+        {
+        public:
+            typedef ::std::allocator<char> compatible_type;
+        };
+
+    } // N.S. io
+} // N.S. boost
+
+
+
+
+
+#endif // include guard
+
+#endif // if workaround