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// (C) Copyright Christopher Jefferson 2011.
// 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 libc++
// Might need more in here later.
#if !defined(_LIBCPP_VERSION)
# include <ciso646>
# if !defined(_LIBCPP_VERSION)
# error "This is not libc++!"
# endif
#endif
#define BOOST_STDLIB "libc++ version " BOOST_STRINGIZE(_LIBCPP_VERSION)
#define BOOST_HAS_THREADS
#ifdef _LIBCPP_HAS_NO_VARIADICS
# define BOOST_NO_CXX11_HDR_TUPLE
#endif
// BOOST_NO_CXX11_ALLOCATOR should imply no support for the C++11
// allocator model. The C++11 allocator model requires a conforming
// std::allocator_traits which is only possible with C++11 template
// aliases since members rebind_alloc and rebind_traits require it.
#if defined(_LIBCPP_HAS_NO_TEMPLATE_ALIASES)
# define BOOST_NO_CXX11_ALLOCATOR
# define BOOST_NO_CXX11_POINTER_TRAITS
#endif
#if __cplusplus < 201103
//
// These two appear to be somewhat useable in C++03 mode, there may be others...
//
//# define BOOST_NO_CXX11_HDR_ARRAY
//# define BOOST_NO_CXX11_HDR_FORWARD_LIST
# define BOOST_NO_CXX11_HDR_CODECVT
# define BOOST_NO_CXX11_HDR_CONDITION_VARIABLE
# define BOOST_NO_CXX11_HDR_EXCEPTION
# 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_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_SMART_PTR
# define BOOST_NO_CXX11_HDR_FUNCTIONAL
# define BOOST_NO_CXX11_STD_ALIGN
# define BOOST_NO_CXX11_ADDRESSOF
# define BOOST_NO_CXX11_HDR_ATOMIC
# define BOOST_NO_CXX11_ATOMIC_SMART_PTR
# define BOOST_NO_CXX11_HDR_CHRONO
# define BOOST_NO_CXX11_HDR_TYPE_TRAITS
# define BOOST_NO_CXX11_HDR_FUTURE
#elif _LIBCPP_VERSION < 3700
//
// These appear to be unusable/incomplete so far:
//
# define BOOST_NO_CXX11_HDR_ATOMIC
# define BOOST_NO_CXX11_ATOMIC_SMART_PTR
# define BOOST_NO_CXX11_HDR_CHRONO
# define BOOST_NO_CXX11_HDR_TYPE_TRAITS
# define BOOST_NO_CXX11_HDR_FUTURE
#endif
#if _LIBCPP_VERSION < 3700
// libc++ uses a non-standard messages_base
#define BOOST_NO_STD_MESSAGES
#endif
// C++14 features
#if (_LIBCPP_VERSION < 3700) || (__cplusplus <= 201402L)
# define BOOST_NO_CXX14_STD_EXCHANGE
#endif
// C++17 features
#if (_LIBCPP_VERSION < 4000) || (__cplusplus <= 201402L)
# define BOOST_NO_CXX17_STD_APPLY
# define BOOST_NO_CXX17_HDR_OPTIONAL
# define BOOST_NO_CXX17_HDR_STRING_VIEW
# define BOOST_NO_CXX17_HDR_VARIANT
#endif
#if (_LIBCPP_VERSION > 4000) && (__cplusplus > 201402L) && !defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
# define BOOST_NO_AUTO_PTR
#endif
#if (_LIBCPP_VERSION > 4000) && (__cplusplus > 201402L) && !defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE)
# define BOOST_NO_CXX98_RANDOM_SHUFFLE
#endif
#if (_LIBCPP_VERSION > 4000) && (__cplusplus > 201402L) && !defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
# define BOOST_NO_CXX98_BINDERS
#endif
#ifdef __has_include
#if __has_include(<version>)
#if !defined(__cpp_lib_execution) || (__cpp_lib_execution < 201603L)
# define BOOST_NO_CXX17_HDR_EXECUTION
#endif
#if !defined(__cpp_lib_invoke) || (__cpp_lib_invoke < 201411L)
#define BOOST_NO_CXX17_STD_INVOKE
#endif
#else
#define BOOST_NO_CXX17_STD_INVOKE // Invoke support is incomplete (no invoke_result)
#define BOOST_NO_CXX17_HDR_EXECUTION
#endif
#else
#define BOOST_NO_CXX17_STD_INVOKE // Invoke support is incomplete (no invoke_result)
#define BOOST_NO_CXX17_HDR_EXECUTION
#endif
#if _LIBCPP_VERSION < 10000 // What's the correct version check here?
#define BOOST_NO_CXX17_ITERATOR_TRAITS
#endif
#if (_LIBCPP_VERSION <= 1101) && !defined(BOOST_NO_CXX11_THREAD_LOCAL)
// This is a bit of a sledgehammer, because really it's just libc++abi that has no
// support for thread_local, leading to linker errors such as
// "undefined reference to `__cxa_thread_atexit'". It is fixed in the
// most recent releases of libc++abi though...
# define BOOST_NO_CXX11_THREAD_LOCAL
#endif
#if defined(__linux__) && (_LIBCPP_VERSION < 6000) && !defined(BOOST_NO_CXX11_THREAD_LOCAL)
// After libc++-dev is installed on Trusty, clang++-libc++ almost works,
// except uses of `thread_local` fail with undefined reference to
// `__cxa_thread_atexit`.
//
// clang's libc++abi provides an implementation by deferring to the glibc
// implementation, which may or may not be available (it is not on Trusty).
// clang 4's libc++abi will provide an implementation if one is not in glibc
// though, so thread local support should work with clang 4 and above as long
// as libc++abi is linked in.
# define BOOST_NO_CXX11_THREAD_LOCAL
#endif
#if defined(__has_include)
#if !__has_include(<shared_mutex>)
# define BOOST_NO_CXX14_HDR_SHARED_MUTEX
#elif __cplusplus <= 201103
# define BOOST_NO_CXX14_HDR_SHARED_MUTEX
#endif
#elif __cplusplus < 201402
# define BOOST_NO_CXX14_HDR_SHARED_MUTEX
#endif
#if !defined(BOOST_NO_CXX14_HDR_SHARED_MUTEX) && (_LIBCPP_VERSION < 5000)
# define BOOST_NO_CXX14_HDR_SHARED_MUTEX
#endif
// --- end ---
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