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llvm/llvm-project/refs/heads/users/cdevadas/enhance-createFrom-function/./libcxx/include/__config
blob: ade43d42dc283de660f3a0e0d36bdb5bfccdade4 [file] [edit]
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___CONFIG
#define _LIBCPP___CONFIG
#include <__config_site>
#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
# pragma GCC system_header
#endif
#ifdef __cplusplus
# include <__configuration/abi.h>
# include <__configuration/attributes.h>
# include <__configuration/availability.h>
# include <__configuration/compiler.h>
# include <__configuration/diagnostic_suppression.h>
# include <__configuration/experimental.h>
# include <__configuration/hardening.h>
# include <__configuration/language.h>
# include <__configuration/namespace.h>
# include <__configuration/platform.h>
# include <__configuration/pstl.h>
# include <__configuration/utility.h>
// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html
// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is
// defined to XXYYZZ.
# define _LIBCPP_VERSION 240000
# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
# define _LIBCPP_ABI_VCRUNTIME
# endif
# if defined(_WIN32)
# if defined(_MSC_VER) && !defined(__MINGW32__)
# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
# endif
# define _LIBCPP_HAS_OPEN_WITH_WCHAR 1
# else
# define _LIBCPP_HAS_OPEN_WITH_WCHAR 0
# endif // defined(_WIN32)
// Libc++ supports various implementations of std::random_device.
//
// _LIBCPP_USING_DEV_RANDOM
// Read entropy from the given file, by default `/dev/urandom`.
// If a token is provided, it is assumed to be the path to a file
// to read entropy from. This is the default behavior if nothing
// else is specified. This implementation requires storing state
// inside `std::random_device`.
//
// _LIBCPP_USING_ARC4_RANDOM
// Use arc4random(). This allows obtaining random data even when
// using sandboxing mechanisms. On some platforms like Apple, this
// is the recommended source of entropy for user-space programs.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_GETENTROPY
// Use getentropy().
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_FUCHSIA_CPRNG
// Use Fuchsia's zx_cprng_draw() system call, which is specified to
// deliver high-quality entropy and cannot fail.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_WIN32_RANDOM
// Use rand_s(), for use on Windows.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
defined(__DragonFly__) || defined(__BIONIC__)
# define _LIBCPP_USING_ARC4_RANDOM
# elif defined(__wasi__) || defined(__EMSCRIPTEN__)
# define _LIBCPP_USING_GETENTROPY
# elif defined(__Fuchsia__)
# define _LIBCPP_USING_FUCHSIA_CPRNG
# elif defined(_WIN32)
# define _LIBCPP_USING_WIN32_RANDOM
# else
# define _LIBCPP_USING_DEV_RANDOM
# endif
# ifndef _LIBCPP_CXX03_LANG
# define _LIBCPP_ALIGNOF(...) alignof(__VA_ARGS__)
# define _ALIGNAS_TYPE(x) alignas(x)
# define _ALIGNAS(x) alignas(x)
# define _NOEXCEPT noexcept
# define _NOEXCEPT_(...) noexcept(__VA_ARGS__)
# define _LIBCPP_CONSTEXPR constexpr
# else
# define _LIBCPP_ALIGNOF(...) _Alignof(__VA_ARGS__)
# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
# define _ALIGNAS(x) __attribute__((__aligned__(x)))
# define nullptr __nullptr
# define _NOEXCEPT throw()
# define _NOEXCEPT_(...)
# define static_assert(...) _Static_assert(__VA_ARGS__)
# define decltype(...) __decltype(__VA_ARGS__)
# define _LIBCPP_CONSTEXPR
typedef __char16_t char16_t;
typedef __char32_t char32_t;
# endif
# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
# if __has_extension(blocks) && defined(__APPLE__)
# define _LIBCPP_HAS_BLOCKS_RUNTIME 1
# else
# define _LIBCPP_HAS_BLOCKS_RUNTIME 0
# endif
# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER)
# define _LIBCPP_HAS_INT128 0
# else
# define _LIBCPP_HAS_INT128 1
# endif
# ifdef _LIBCPP_CXX03_LANG
# define _LIBCPP_DECLARE_STRONG_ENUM(x) \
struct _LIBCPP_EXPORTED_FROM_ABI x { \
enum __lx
// clang-format off
# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
__lx __v_; \
_LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \
_LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
_LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \
};
// clang-format on
# else // _LIBCPP_CXX03_LANG
# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x
# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
# endif // _LIBCPP_CXX03_LANG
# ifdef __FreeBSD__
# define _DECLARE_C99_LDBL_MATH 1
# endif
# if defined(__cpp_aligned_new) && __cpp_aligned_new >= 201606
# define _LIBCPP_HAS_ALIGNED_ALLOCATION 1
# else
# define _LIBCPP_HAS_ALIGNED_ALLOCATION 0
# endif
# if defined(__APPLE__) || defined(__FreeBSD__)
# define _LIBCPP_WCTYPE_IS_MASK
# endif
// FIXME: using `#warning` causes diagnostics from system headers which include deprecated headers. This can only be
// enabled again once https://github.com/llvm/llvm-project/pull/168041 (or a similar feature) has landed, since that
// allows suppression in system headers.
# if defined(__DEPRECATED) && __DEPRECATED && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) && 0
# define _LIBCPP_DIAGNOSE_DEPRECATED_HEADERS 1
# else
# define _LIBCPP_DIAGNOSE_DEPRECATED_HEADERS 0
# endif
// Thread API
// clang-format off
# if _LIBCPP_HAS_THREADS && \
!_LIBCPP_HAS_THREAD_API_PTHREAD && \
!_LIBCPP_HAS_THREAD_API_WIN32 && \
!_LIBCPP_HAS_THREAD_API_EXTERNAL && \
!_LIBCPP_HAS_THREAD_API_C11
# if defined(__FreeBSD__) || \
defined(__wasi__) || \
defined(__NetBSD__) || \
defined(__OpenBSD__) || \
defined(__NuttX__) || \
defined(__linux__) || \
defined(__GNU__) || \
defined(__APPLE__) || \
defined(__MVS__) || \
defined(_AIX) || \
defined(__EMSCRIPTEN__)
// clang-format on
# undef _LIBCPP_HAS_THREAD_API_PTHREAD
# define _LIBCPP_HAS_THREAD_API_PTHREAD 1
# elif defined(__Fuchsia__)
// TODO(44575): Switch to C11 thread API when possible.
# undef _LIBCPP_HAS_THREAD_API_PTHREAD
# define _LIBCPP_HAS_THREAD_API_PTHREAD 1
# elif defined(_WIN32)
# undef _LIBCPP_HAS_THREAD_API_WIN32
# define _LIBCPP_HAS_THREAD_API_WIN32 1
# else
# error "No thread API"
# endif // _LIBCPP_HAS_THREAD_API
# endif // _LIBCPP_HAS_THREADS
# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_PTHREAD
# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be true when _LIBCPP_HAS_THREADS is true.
# endif
# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_EXTERNAL
# error _LIBCPP_HAS_THREAD_API_EXTERNAL may only be true when _LIBCPP_HAS_THREADS is true.
# endif
# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_C11
# error _LIBCPP_HAS_THREAD_API_C11 may only be true when _LIBCPP_HAS_THREADS is true.
# endif
# if !_LIBCPP_HAS_MONOTONIC_CLOCK && _LIBCPP_HAS_THREADS
# error _LIBCPP_HAS_MONOTONIC_CLOCK may only be false when _LIBCPP_HAS_THREADS is false.
# endif
# if _LIBCPP_HAS_THREADS && !defined(__STDCPP_THREADS__)
# define __STDCPP_THREADS__ 1
# endif
// The glibc and Bionic implementation of pthreads implements
// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
// mutexes have no destroy mechanism.
//
// This optimization can't be performed on Apple platforms, where
// pthread_mutex_destroy can allow the kernel to release resources.
// See https://llvm.org/D64298 for details.
//
// clang-format off
# if (_LIBCPP_HAS_THREAD_API_PTHREAD && (defined(__GLIBC__) || defined(__BIONIC__))) || \
(_LIBCPP_HAS_THREAD_API_C11 && defined(__Fuchsia__)) || \
_LIBCPP_HAS_THREAD_API_WIN32
// clang-format on
# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1
# else
# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 0
# endif
// Destroying a condvar is a nop on Windows.
//
// This optimization can't be performed on Apple platforms, where
// pthread_cond_destroy can allow the kernel to release resources.
// See https://llvm.org/D64298 for details.
//
// TODO(EricWF): This is potentially true for some pthread implementations
// as well.
# if (_LIBCPP_HAS_THREAD_API_C11 && defined(__Fuchsia__)) || _LIBCPP_HAS_THREAD_API_WIN32
# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1
# else
# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 0
# endif
// We often repeat things just for handling wide characters in the library.
// When wide characters are disabled, it can be useful to have a quick way of
// disabling it without having to resort to #if-#endif, which has a larger
// impact on readability.
# if !_LIBCPP_HAS_WIDE_CHARACTERS
# define _LIBCPP_IF_WIDE_CHARACTERS(...)
# else
# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__
# endif
// clang-format off
# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh\")") _Pragma("push_macro(\"move\")") _Pragma("push_macro(\"erase\")")
# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh\")") _Pragma("pop_macro(\"move\")") _Pragma("pop_macro(\"erase\")")
// clang-format on
# ifndef _LIBCPP_NO_AUTO_LINK
# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# pragma comment(lib, "c++.lib")
# else
# pragma comment(lib, "libc++.lib")
# endif
# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
# endif // _LIBCPP_NO_AUTO_LINK
// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these
// functions is gradually being added to existing C libraries. The conditions
// below check for known C library versions and conditions under which these
// functions are declared by the C library.
//
// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if
// __cpp_char8_t is defined or if C2X extensions are enabled. Determining
// the latter depends on internal GNU libc details that are not appropriate
// to depend on here, so any declarations present when __cpp_char8_t is not
// defined are ignored.
# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t)
# define _LIBCPP_HAS_C8RTOMB_MBRTOC8 1
# else
# define _LIBCPP_HAS_C8RTOMB_MBRTOC8 0
# endif
// There are a handful of public standard library types that are intended to
// support CTAD but don't need any explicit deduction guides to do so. This
// macro is used to mark them as such, which suppresses the
// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code
// with these classes.
# if _LIBCPP_STD_VER >= 17
# ifdef _LIBCPP_COMPILER_CLANG_BASED
# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \
template <class... _Tag> \
[[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...>
# else
# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \
template <class... _Tag> \
ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...>
# endif
# else
# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "")
# endif
#endif // __cplusplus
#endif // _LIBCPP___CONFIG