//  (C) Copyright John Maddock 2001.

 //  (C) Copyright Jens Maurer 2001.

 //  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 for most recent version.

 //  config for libstdc++ v3

 //  not much to go in here:

 #ifdef __GLIBCXX__

 #define BOOST_STDLIB "GNU libstdc++ version " BOOST_STRINGIZE(__GLIBCXX__)

 #else

 #define BOOST_STDLIB "GNU libstdc++ version " BOOST_STRINGIZE(__GLIBCPP__)

 #endif

 #if !defined(_GLIBCPP_USE_WCHAR_T) && !defined(_GLIBCXX_USE_WCHAR_T)

 #  define BOOST_NO_CWCHAR

 #  define BOOST_NO_CWCTYPE

 #  define BOOST_NO_STD_WSTRING

 #  define BOOST_NO_STD_WSTREAMBUF

 #endif

 #if defined(__osf__) && !defined(_REENTRANT) \

   && ( defined(_GLIBCXX_HAVE_GTHR_DEFAULT) || defined(_GLIBCPP_HAVE_GTHR_DEFAULT) )

 // GCC 3 on Tru64 forces the definition of _REENTRANT when any std lib header

 // file is included, therefore for consistency we define it here as well.

 #  define _REENTRANT

 #endif

 #ifdef __GLIBCXX__ // gcc 3.4 and greater:

 #  if defined(_GLIBCXX_HAVE_GTHR_DEFAULT) \

         || defined(_GLIBCXX__PTHREADS)

       //

       // If the std lib has thread support turned on, then turn it on in Boost

       // as well.  We do this because some gcc-3.4 std lib headers define _REENTANT

       // while others do not...

       //

 #     define BOOST_HAS_THREADS

 #  else

 #     define BOOST_DISABLE_THREADS

 #  endif

 #elif defined(__GLIBCPP__) \

         && !defined(_GLIBCPP_HAVE_GTHR_DEFAULT) \

         && !defined(_GLIBCPP__PTHREADS)

    // disable thread support if the std lib was built single threaded:

 #  define BOOST_DISABLE_THREADS

 #endif

 #if (defined(linux) || defined(__linux) || defined(__linux__)) && defined(__arm__) && defined(_GLIBCPP_HAVE_GTHR_DEFAULT)

 // linux on arm apparently doesn't define _REENTRANT

 // so just turn on threading support whenever the std lib is thread safe:

 #  define BOOST_HAS_THREADS

 #endif

 #if !defined(_GLIBCPP_USE_LONG_LONG) \

     && !defined(_GLIBCXX_USE_LONG_LONG)\

     && defined(BOOST_HAS_LONG_LONG)

 // May have been set by compiler/*.hpp, but "long long" without library

 // support is useless.

 #  undef BOOST_HAS_LONG_LONG

 #endif

 #if defined(__GLIBCXX__) || (defined(__GLIBCPP__) && __GLIBCPP__>=20020514) // GCC >= 3.1.0

 #  define BOOST_STD_EXTENSION_NAMESPACE __gnu_cxx

 #  define BOOST_HAS_SLIST

 #  define BOOST_HAS_HASH

 #  define BOOST_SLIST_HEADER <ext/slist>

 #  define BOOST_HASH_SET_HEADER <ext/hash_set>

 #  define BOOST_HASH_MAP_HEADER <ext/hash_map>

 #endif