text: //  (C) Copyright John Maddock 2001 - 2002. 
  //  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.
  
  #if __IBMCPP__ <= 501
  #  define BOOST_NO_STD_ALLOCATOR
  #endif
  
  #define BOOST_HAS_MACRO_USE_FACET
  #define BOOST_NO_STD_MESSAGES
  
  // Apple doesn't seem to reliably defined a *unix* macro
  #if !defined(CYGWIN) && (  defined(__unix__)  \
                          || defined(__unix)    \
                          || defined(unix)      \
                          || defined(__APPLE__) \
                          || defined(__APPLE)   \
                          || defined(APPLE))
  #  include <unistd.h>
  #endif
  
  //  C++0x headers not yet implemented
  //
  #  define BOOST_NO_CXX11_HDR_ARRAY
  #  define BOOST_NO_CXX11_HDR_CHRONO
  #  define BOOST_NO_CXX11_HDR_CODECVT
  #  define BOOST_NO_CXX11_HDR_CONDITION_VARIABLE
  #  define BOOST_NO_CXX11_HDR_FORWARD_LIST
  #  define BOOST_NO_CXX11_HDR_FUTURE
  #  define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
  #  define BOOST_NO_CXX11_HDR_MUTEX
  #  define BOOST_NO_CXX11_HDR_RANDOM
  #  define BOOST_NO_CXX11_HDR_RATIO
  #  define BOOST_NO_CXX11_HDR_REGEX
  #  define BOOST_NO_CXX11_HDR_SYSTEM_ERROR
  #  define BOOST_NO_CXX11_HDR_THREAD
  #  define BOOST_NO_CXX11_HDR_TUPLE
  #  define BOOST_NO_CXX11_HDR_TYPE_TRAITS
  #  define BOOST_NO_CXX11_HDR_TYPEINDEX
  #  define BOOST_NO_CXX11_HDR_UNORDERED_MAP
  #  define BOOST_NO_CXX11_HDR_UNORDERED_SET
  #  define BOOST_NO_CXX11_NUMERIC_LIMITS
  #  define BOOST_NO_CXX11_ALLOCATOR
  #  define BOOST_NO_CXX11_POINTER_TRAITS
  #  define BOOST_NO_CXX11_ATOMIC_SMART_PTR
  #  define BOOST_NO_CXX11_SMART_PTR
  #  define BOOST_NO_CXX11_HDR_FUNCTIONAL
  #  define BOOST_NO_CXX11_HDR_ATOMIC
  #  define BOOST_NO_CXX11_STD_ALIGN
  #  define BOOST_NO_CXX11_ADDRESSOF
  
  #if defined(__has_include)
  #if !__has_include(<shared_mutex>)
  #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
  #elif __cplusplus < 201402
  #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
  #endif
  #else
  #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
  #endif
  
  // C++14 features
  #  define BOOST_NO_CXX14_STD_EXCHANGE
  
  // C++17 features
  #  define BOOST_NO_CXX17_STD_APPLY
  #  define BOOST_NO_CXX17_STD_INVOKE
  #  define BOOST_NO_CXX17_ITERATOR_TRAITS
  
  #define BOOST_STDLIB "Visual Age default standard library"
  