//  (C) Copyright John Maddock 2001 - 2003. 

 //  (C) Copyright Darin Adler 2001 - 2002. 

 //  (C) Copyright Jens Maurer 2001 - 2002. 

 //  (C) Copyright Beman Dawes 2001 - 2003. 

 //  (C) Copyright Douglas Gregor 2002. 

 //  (C) Copyright David Abrahams 2002 - 2003. 

 //  (C) Copyright Synge Todo 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 for most recent version.

 //  GNU C++ compiler setup:

 #if __GNUC__ < 3

 #   if __GNUC_MINOR__ == 91

        // egcs 1.1 won't parse shared_ptr.hpp without this:

 #      define BOOST_NO_AUTO_PTR

 #   endif

 #   if __GNUC_MINOR__ < 95

       //

       // Prior to gcc 2.95 member templates only partly

       // work - define BOOST_MSVC6_MEMBER_TEMPLATES

       // instead since inline member templates mostly work.

       //

 #     define BOOST_NO_MEMBER_TEMPLATES

 #     if __GNUC_MINOR__ >= 9

 #       define BOOST_MSVC6_MEMBER_TEMPLATES

 #     endif

 #   endif

 #   if __GNUC_MINOR__ < 96

 #     define BOOST_NO_SFINAE

 #   endif

 #   if __GNUC_MINOR__ <= 97

 #     define BOOST_NO_MEMBER_TEMPLATE_FRIENDS

 #     define BOOST_NO_OPERATORS_IN_NAMESPACE

 #   endif

 #   define BOOST_NO_USING_DECLARATION_OVERLOADS_FROM_TYPENAME_BASE

 #   define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL

 #   define BOOST_NO_IS_ABSTRACT

 #elif __GNUC__ == 3

    //

    // gcc-3.x problems:

    //

    // Bug specific to gcc 3.1 and 3.2:

    //

 #  if ((__GNUC_MINOR__ == 1) || (__GNUC_MINOR__ == 2))

 #     define BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS

 #  endif

 #  if __GNUC_MINOR__ < 4

 #     define BOOST_NO_IS_ABSTRACT

 #  endif

 #endif

 #ifndef __EXCEPTIONS

 # define BOOST_NO_EXCEPTIONS

 #endif

 //

 // Threading support: Turn this on unconditionally here (except for

 // those platforms where we can know for sure). It will get turned off again

 // later if no threading API is detected.

 //

 #if !defined(__MINGW32__) && !defined(linux) && !defined(__linux) && !defined(__linux__)

 # define BOOST_HAS_THREADS

 #endif 

 //

 // gcc has "long long"

 //

 #define BOOST_HAS_LONG_LONG

 //

 // gcc implements the named return value optimization since version 3.1

 //

 #if __GNUC__ > 3 || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 1 )

 #define BOOST_HAS_NRVO

 #endif

 #define BOOST_COMPILER "GNU C++ version " __VERSION__

 //

 // versions check:

 // we don't know gcc prior to version 2.90:

 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 90)

 #  error "Compiler not configured - please reconfigure"

 #endif

 //

 // last known and checked version is 4.0 (Pre-release):

 #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))

 #  if defined(BOOST_ASSERT_CONFIG)

 #     error "Unknown compiler version - please run the configure tests and report the results"

 #  else

 // we don't emit warnings here anymore since there are no defect macros defined for

 // gcc post 3.4, so any failures are gcc regressions...

 //#     warning "Unknown compiler version - please run the configure tests and report the results"

 #  endif

 #endif