1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___CONFIG 11#define _LIBCPP___CONFIG 12 13#include <__config_site> 14 15#if defined(_MSC_VER) && !defined(__clang__) 16# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 18# endif 19#endif 20 21#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 22# pragma GCC system_header 23#endif 24 25#if defined(__apple_build_version__) 26// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403) 27# define _LIBCPP_COMPILER_CLANG_BASED 28# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 29#elif defined(__clang__) 30# define _LIBCPP_COMPILER_CLANG_BASED 31# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 32#elif defined(__GNUC__) 33# define _LIBCPP_COMPILER_GCC 34#endif 35 36#ifdef __cplusplus 37 38// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html 39 40// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM. 41// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is 42// defined to XXYYZZ. 43# define _LIBCPP_VERSION 170006 44 45# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y 46# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) 47 48# if __STDC_HOSTED__ == 0 49# define _LIBCPP_FREESTANDING 50# endif 51 52// NOLINTBEGIN(libcpp-cpp-version-check) 53# ifndef _LIBCPP_STD_VER 54# if __cplusplus <= 201103L 55# define _LIBCPP_STD_VER 11 56# elif __cplusplus <= 201402L 57# define _LIBCPP_STD_VER 14 58# elif __cplusplus <= 201703L 59# define _LIBCPP_STD_VER 17 60# elif __cplusplus <= 202002L 61# define _LIBCPP_STD_VER 20 62# elif __cplusplus <= 202302L 63# define _LIBCPP_STD_VER 23 64# else 65// Expected release year of the next C++ standard 66# define _LIBCPP_STD_VER 26 67# endif 68# endif // _LIBCPP_STD_VER 69// NOLINTEND(libcpp-cpp-version-check) 70 71# if defined(__ELF__) 72# define _LIBCPP_OBJECT_FORMAT_ELF 1 73# elif defined(__MACH__) 74# define _LIBCPP_OBJECT_FORMAT_MACHO 1 75# elif defined(_WIN32) 76# define _LIBCPP_OBJECT_FORMAT_COFF 1 77# elif defined(__wasm__) 78# define _LIBCPP_OBJECT_FORMAT_WASM 1 79# elif defined(_AIX) 80# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 81# else 82// ... add new file formats here ... 83# endif 84 85// ABI { 86 87# if _LIBCPP_ABI_VERSION >= 2 88// Change short string representation so that string data starts at offset 0, 89// improving its alignment in some cases. 90# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 91// Fix deque iterator type in order to support incomplete types. 92# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 93// Fix undefined behavior in how std::list stores its linked nodes. 94# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 95// Fix undefined behavior in how __tree stores its end and parent nodes. 96# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 97// Fix undefined behavior in how __hash_table stores its pointer types. 98# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 99# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 100# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 101// Define a key function for `bad_function_call` in the library, to centralize 102// its vtable and typeinfo to libc++ rather than having all other libraries 103// using that class define their own copies. 104# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 105// Override the default return value of exception::what() for 106// bad_function_call::what() with a string that is specific to 107// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 108// because it changes the vtable layout of bad_function_call. 109# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 110// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 111# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 112// Give reverse_iterator<T> one data member of type T, not two. 113// Also, in C++17 and later, don't derive iterator types from std::iterator. 114# define _LIBCPP_ABI_NO_ITERATOR_BASES 115// Use the smallest possible integer type to represent the index of the variant. 116// Previously libc++ used "unsigned int" exclusively. 117# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 118// Unstable attempt to provide a more optimized std::function 119# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 120// All the regex constants must be distinct and nonzero. 121# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 122// Re-worked external template instantiations for std::string with a focus on 123// performance and fast-path inlining. 124# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 125// Enable clang::trivial_abi on std::unique_ptr. 126# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 127// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 128# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 129// std::random_device holds some state when it uses an implementation that gets 130// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 131// implementation to another one on a platform that has already shipped 132// std::random_device, one needs to retain the same object layout to remain ABI 133// compatible. This switch removes these workarounds for platforms that don't care 134// about ABI compatibility. 135# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 136// Don't export the legacy __basic_string_common class and its methods from the built library. 137# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 138// Don't export the legacy __vector_base_common class and its methods from the built library. 139# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 140// According to the Standard, `bitset::operator[] const` returns bool 141# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 142// Fix the implementation of CityHash used for std::hash<fundamental-type>. 143// This is an ABI break because `std::hash` will return a different result, 144// which means that hashing the same object in translation units built against 145// different versions of libc++ can return inconsistent results. This is especially 146// tricky since std::hash is used in the implementation of unordered containers. 147// 148// The incorrect implementation of CityHash has the problem that it drops some 149// bits on the floor. 150# define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION 151// Remove the base 10 implementation of std::to_chars from the dylib. 152// The implementation moved to the header, but we still export the symbols from 153// the dylib for backwards compatibility. 154# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 155# elif _LIBCPP_ABI_VERSION == 1 156# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 157// Enable compiling copies of now inline methods into the dylib to support 158// applications compiled against older libraries. This is unnecessary with 159// COFF dllexport semantics, since dllexport forces a non-inline definition 160// of inline functions to be emitted anyway. Our own non-inline copy would 161// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 162// the linker will take issue with the symbols in the shared object if the 163// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 164// so disable it. 165# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 166# endif 167// Feature macros for disabling pre ABI v1 features. All of these options 168// are deprecated. 169# if defined(__FreeBSD__) 170# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 171# endif 172// For XCOFF linkers, we have problems if we see a weak hidden version of a symbol 173// in user code (like you get with -fvisibility-inlines-hidden) and then a strong def 174// in the library, so we need to always rely on the library version. 175# if defined(_AIX) 176# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 177# endif 178# endif 179 180# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 181// Enable additional explicit instantiations of iostreams components. This 182// reduces the number of weak definitions generated in programs that use 183// iostreams by providing a single strong definition in the shared library. 184# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 185 186// Define a key function for `bad_function_call` in the library, to centralize 187// its vtable and typeinfo to libc++ rather than having all other libraries 188// using that class define their own copies. 189# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 190# endif 191 192// Changes the iterator type of select containers (see below) to a bounded iterator that keeps track of whether it's 193// within the bounds of the original container and asserts it on every dereference. 194// 195// ABI impact: changes the iterator type of the relevant containers. 196// 197// Supported containers: 198// - `span`; 199// - `string_view`; 200// - `array`. 201// #define _LIBCPP_ABI_BOUNDED_ITERATORS 202 203// } ABI 204 205// HARDENING { 206 207# ifndef _LIBCPP_ENABLE_ASSERTIONS 208# define _LIBCPP_ENABLE_ASSERTIONS _LIBCPP_ENABLE_ASSERTIONS_DEFAULT 209# endif 210# if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1 211# error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1" 212# endif 213 214// NOTE: These modes are experimental and are not stable yet in LLVM 17. Please refrain from using them and use the 215// documented libc++ "safe" mode instead. 216// 217// Enables the hardened mode which consists of all checks intended to be used in production. Hardened mode prioritizes 218// security-critical checks that can be done with relatively little overhead in constant time. Mutually exclusive with 219// `_LIBCPP_ENABLE_DEBUG_MODE`. 220// 221// #define _LIBCPP_ENABLE_HARDENED_MODE 1 222 223// Enables the debug mode which contains all the checks from the hardened mode and additionally more expensive checks 224// that may affect the complexity of algorithms. The debug mode is intended to be used for testing, not in production. 225// Mutually exclusive with `_LIBCPP_ENABLE_HARDENED_MODE`. 226// 227// #define _LIBCPP_ENABLE_DEBUG_MODE 1 228 229// Inside the library, assertions are categorized so they can be cherry-picked based on the chosen hardening mode. These 230// macros are only for internal use -- users should only pick one of the high-level hardening modes described above. 231// 232// - `_LIBCPP_ASSERT_VALID_INPUT_RANGE` -- checks that ranges (whether expressed as an iterator pair, an iterator and 233// a sentinel, an iterator and a count, or a `std::range`) given as input to library functions are valid: 234// - the sentinel is reachable from the begin iterator; 235// - TODO(hardening): both iterators refer to the same container. 236// 237// - `_LIBCPP_ASSERT_VALID_ELEMENT_ACCESS` -- checks that any attempts to access a container element, whether through 238// the container object or through an iterator, are valid and do not attempt to go out of bounds or otherwise access 239// a non-existent element. For iterator checks to work, bounded iterators must be enabled in the ABI. Types like 240// `optional` and `function` are considered one-element containers for the purposes of this check. 241// 242// - `_LIBCPP_ASSERT_NON_OVERLAPPING_RANGES` -- for functions that take several ranges as arguments, checks that the 243// given ranges do not overlap. 244// 245// - `_LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR` -- checks any operations that exchange nodes between containers to make sure 246// the containers have compatible allocators. 247// 248// - `_LIBCPP_ASSERT_INTERNAL` -- checks that internal invariants of the library hold. These assertions don't depend on 249// user input. 250// 251// - `_LIBCPP_ASSERT_UNCATEGORIZED` -- for assertions that haven't been properly classified yet. 252 253# ifndef _LIBCPP_ENABLE_HARDENED_MODE 254# define _LIBCPP_ENABLE_HARDENED_MODE _LIBCPP_ENABLE_HARDENED_MODE_DEFAULT 255# endif 256# if _LIBCPP_ENABLE_HARDENED_MODE != 0 && _LIBCPP_ENABLE_HARDENED_MODE != 1 257# error "_LIBCPP_ENABLE_HARDENED_MODE must be set to 0 or 1." 258# endif 259 260# ifndef _LIBCPP_ENABLE_DEBUG_MODE 261# define _LIBCPP_ENABLE_DEBUG_MODE _LIBCPP_ENABLE_DEBUG_MODE_DEFAULT 262# endif 263# if _LIBCPP_ENABLE_DEBUG_MODE != 0 && _LIBCPP_ENABLE_DEBUG_MODE != 1 264# error "_LIBCPP_ENABLE_DEBUG_MODE must be set to 0 or 1." 265# endif 266 267# if _LIBCPP_ENABLE_HARDENED_MODE && _LIBCPP_ENABLE_DEBUG_MODE 268# error "Only one of _LIBCPP_ENABLE_HARDENED_MODE and _LIBCPP_ENABLE_DEBUG_MODE can be enabled." 269# endif 270 271# if _LIBCPP_ENABLE_ASSERTIONS && (_LIBCPP_ENABLE_HARDENED_MODE || _LIBCPP_ENABLE_DEBUG_MODE) 272# error \ 273 "_LIBCPP_ENABLE_ASSERTIONS is mutually exclusive with _LIBCPP_ENABLE_HARDENED_MODE and _LIBCPP_ENABLE_DEBUG_MODE." 274# endif 275 276// Hardened mode checks. 277 278// clang-format off 279# if _LIBCPP_ENABLE_HARDENED_MODE 280 281// Enabled checks. 282# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 283# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 284// Disabled checks. 285// Overlapping ranges will make algorithms produce incorrect results but don't directly lead to a security 286// vulnerability. 287# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSUME(expression) 288# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSUME(expression) 289# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 290# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSUME(expression) 291 292// Debug mode checks. 293 294# elif _LIBCPP_ENABLE_DEBUG_MODE 295 296// All checks enabled. 297# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 298# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 299# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSERT(expression, message) 300# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSERT(expression, message) 301# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSERT(expression, message) 302# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSERT(expression, message) 303 304// Safe mode checks. 305 306# elif _LIBCPP_ENABLE_ASSERTIONS 307 308// All checks enabled. 309# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 310# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 311# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSERT(expression, message) 312# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSERT(expression, message) 313# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSERT(expression, message) 314# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSERT(expression, message) 315 316// Disable all checks if hardening is not enabled. 317 318# else 319 320// All checks disabled. 321# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSUME(expression) 322# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSUME(expression) 323# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSUME(expression) 324# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSUME(expression) 325# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 326# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSUME(expression) 327 328# endif // _LIBCPP_ENABLE_HARDENED_MODE 329// clang-format on 330 331// } HARDENING 332 333# define _LIBCPP_TOSTRING2(x) #x 334# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 335 336// NOLINTNEXTLINE(libcpp-cpp-version-check) 337# if __cplusplus < 201103L 338# define _LIBCPP_CXX03_LANG 339# endif 340 341# ifndef __has_attribute 342# define __has_attribute(__x) 0 343# endif 344 345# ifndef __has_builtin 346# define __has_builtin(__x) 0 347# endif 348 349# ifndef __has_extension 350# define __has_extension(__x) 0 351# endif 352 353# ifndef __has_feature 354# define __has_feature(__x) 0 355# endif 356 357# ifndef __has_cpp_attribute 358# define __has_cpp_attribute(__x) 0 359# endif 360 361# ifndef __has_constexpr_builtin 362# define __has_constexpr_builtin(x) 0 363# endif 364 365// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 366// the compiler and '1' otherwise. 367# ifndef __is_identifier 368# define __is_identifier(__x) 1 369# endif 370 371# ifndef __has_declspec_attribute 372# define __has_declspec_attribute(__x) 0 373# endif 374 375# define __has_keyword(__x) !(__is_identifier(__x)) 376 377# ifndef __has_include 378# define __has_include(...) 0 379# endif 380 381# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L 382# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" 383# endif 384 385// FIXME: ABI detection should be done via compiler builtin macros. This 386// is just a placeholder until Clang implements such macros. For now assume 387// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 388// and allow the user to explicitly specify the ABI to handle cases where this 389// heuristic falls short. 390# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 391# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 392# elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 393# define _LIBCPP_ABI_ITANIUM 394# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 395# define _LIBCPP_ABI_MICROSOFT 396# else 397# if defined(_WIN32) && defined(_MSC_VER) 398# define _LIBCPP_ABI_MICROSOFT 399# else 400# define _LIBCPP_ABI_ITANIUM 401# endif 402# endif 403 404# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 405# define _LIBCPP_ABI_VCRUNTIME 406# endif 407 408# if __has_feature(experimental_library) 409# ifndef _LIBCPP_ENABLE_EXPERIMENTAL 410# define _LIBCPP_ENABLE_EXPERIMENTAL 411# endif 412# endif 413 414// Incomplete features get their own specific disabling flags. This makes it 415// easier to grep for target specific flags once the feature is complete. 416# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) 417# define _LIBCPP_HAS_NO_INCOMPLETE_PSTL 418# endif 419 420# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) 421# define _LIBCPP_HAS_NO_EXPERIMENTAL_STOP_TOKEN 422# endif 423 424// Need to detect which libc we're using if we're on Linux. 425# if defined(__linux__) 426# include <features.h> 427# if defined(__GLIBC_PREREQ) 428# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 429# else 430# define _LIBCPP_GLIBC_PREREQ(a, b) 0 431# endif // defined(__GLIBC_PREREQ) 432# endif // defined(__linux__) 433 434# if defined(__MVS__) 435# include <features.h> // for __NATIVE_ASCII_F 436# endif 437 438# ifdef __LITTLE_ENDIAN__ 439# if __LITTLE_ENDIAN__ 440# define _LIBCPP_LITTLE_ENDIAN 441# endif // __LITTLE_ENDIAN__ 442# endif // __LITTLE_ENDIAN__ 443 444# ifdef __BIG_ENDIAN__ 445# if __BIG_ENDIAN__ 446# define _LIBCPP_BIG_ENDIAN 447# endif // __BIG_ENDIAN__ 448# endif // __BIG_ENDIAN__ 449 450# ifdef __BYTE_ORDER__ 451# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 452# define _LIBCPP_LITTLE_ENDIAN 453# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 454# define _LIBCPP_BIG_ENDIAN 455# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 456# endif // __BYTE_ORDER__ 457 458# ifdef __FreeBSD__ 459# include <osreldate.h> 460# include <sys/endian.h> 461# if _BYTE_ORDER == _LITTLE_ENDIAN 462# define _LIBCPP_LITTLE_ENDIAN 463# else // _BYTE_ORDER == _LITTLE_ENDIAN 464# define _LIBCPP_BIG_ENDIAN 465# endif // _BYTE_ORDER == _LITTLE_ENDIAN 466# endif // __FreeBSD__ 467 468# if defined(__NetBSD__) || defined(__OpenBSD__) 469# include <sys/endian.h> 470# if _BYTE_ORDER == _LITTLE_ENDIAN 471# define _LIBCPP_LITTLE_ENDIAN 472# else // _BYTE_ORDER == _LITTLE_ENDIAN 473# define _LIBCPP_BIG_ENDIAN 474# endif // _BYTE_ORDER == _LITTLE_ENDIAN 475# endif // defined(__NetBSD__) || defined(__OpenBSD__) 476 477# if defined(_WIN32) 478# define _LIBCPP_WIN32API 479# define _LIBCPP_LITTLE_ENDIAN 480# define _LIBCPP_SHORT_WCHAR 1 481// Both MinGW and native MSVC provide a "MSVC"-like environment 482# define _LIBCPP_MSVCRT_LIKE 483// If mingw not explicitly detected, assume using MS C runtime only if 484// a MS compatibility version is specified. 485# if defined(_MSC_VER) && !defined(__MINGW32__) 486# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 487# endif 488# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 489# define _LIBCPP_HAS_BITSCAN64 490# endif 491# define _LIBCPP_HAS_OPEN_WITH_WCHAR 492# endif // defined(_WIN32) 493 494# if defined(_AIX) && !defined(__64BIT__) 495// The size of wchar is 2 byte on 32-bit mode on AIX. 496# define _LIBCPP_SHORT_WCHAR 1 497# endif 498 499// Libc++ supports various implementations of std::random_device. 500// 501// _LIBCPP_USING_DEV_RANDOM 502// Read entropy from the given file, by default `/dev/urandom`. 503// If a token is provided, it is assumed to be the path to a file 504// to read entropy from. This is the default behavior if nothing 505// else is specified. This implementation requires storing state 506// inside `std::random_device`. 507// 508// _LIBCPP_USING_ARC4_RANDOM 509// Use arc4random(). This allows obtaining random data even when 510// using sandboxing mechanisms. On some platforms like Apple, this 511// is the recommended source of entropy for user-space programs. 512// When this option is used, the token passed to `std::random_device`'s 513// constructor *must* be "/dev/urandom" -- anything else is an error. 514// 515// _LIBCPP_USING_GETENTROPY 516// Use getentropy(). 517// When this option is used, the token passed to `std::random_device`'s 518// constructor *must* be "/dev/urandom" -- anything else is an error. 519// 520// _LIBCPP_USING_FUCHSIA_CPRNG 521// Use Fuchsia's zx_cprng_draw() system call, which is specified to 522// deliver high-quality entropy and cannot fail. 523// When this option is used, the token passed to `std::random_device`'s 524// constructor *must* be "/dev/urandom" -- anything else is an error. 525// 526// _LIBCPP_USING_NACL_RANDOM 527// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 528// including accesses to the special files under `/dev`. This implementation 529// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 530// When this option is used, the token passed to `std::random_device`'s 531// constructor *must* be "/dev/urandom" -- anything else is an error. 532// 533// _LIBCPP_USING_WIN32_RANDOM 534// Use rand_s(), for use on Windows. 535// When this option is used, the token passed to `std::random_device`'s 536// constructor *must* be "/dev/urandom" -- anything else is an error. 537# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 538 defined(__DragonFly__) 539# define _LIBCPP_USING_ARC4_RANDOM 540# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 541# define _LIBCPP_USING_GETENTROPY 542# elif defined(__Fuchsia__) 543# define _LIBCPP_USING_FUCHSIA_CPRNG 544# elif defined(__native_client__) 545# define _LIBCPP_USING_NACL_RANDOM 546# elif defined(_LIBCPP_WIN32API) 547# define _LIBCPP_USING_WIN32_RANDOM 548# else 549# define _LIBCPP_USING_DEV_RANDOM 550# endif 551 552# if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 553# include <endian.h> 554# if __BYTE_ORDER == __LITTLE_ENDIAN 555# define _LIBCPP_LITTLE_ENDIAN 556# elif __BYTE_ORDER == __BIG_ENDIAN 557# define _LIBCPP_BIG_ENDIAN 558# else // __BYTE_ORDER == __BIG_ENDIAN 559# error unable to determine endian 560# endif 561# endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 562 563# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 564# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 565# else 566# define _LIBCPP_NO_CFI 567# endif 568 569# ifndef _LIBCPP_CXX03_LANG 570 571# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 572# define _ALIGNAS_TYPE(x) alignas(x) 573# define _ALIGNAS(x) alignas(x) 574# define _LIBCPP_NORETURN [[noreturn]] 575# define _NOEXCEPT noexcept 576# define _NOEXCEPT_(x) noexcept(x) 577# define _LIBCPP_CONSTEXPR constexpr 578 579# else 580 581# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 582# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 583# define _ALIGNAS(x) __attribute__((__aligned__(x))) 584# define _LIBCPP_NORETURN __attribute__((__noreturn__)) 585# define _LIBCPP_HAS_NO_NOEXCEPT 586# define nullptr __nullptr 587# define _NOEXCEPT throw() 588# define _NOEXCEPT_(x) 589# define static_assert(...) _Static_assert(__VA_ARGS__) 590# define decltype(...) __decltype(__VA_ARGS__) 591# define _LIBCPP_CONSTEXPR 592 593typedef __char16_t char16_t; 594typedef __char32_t char32_t; 595 596# endif 597 598# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L 599# define _LIBCPP_HAS_NO_EXCEPTIONS 600# endif 601 602# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 603 604# if defined(_LIBCPP_COMPILER_CLANG_BASED) 605 606# if defined(__APPLE__) 607# if defined(__i386__) || defined(__x86_64__) 608// use old string layout on x86_64 and i386 609# elif defined(__arm__) 610// use old string layout on arm (which does not include aarch64/arm64), except on watch ABIs 611# if defined(__ARM_ARCH_7K__) && __ARM_ARCH_7K__ >= 2 612# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 613# endif 614# else 615# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 616# endif 617# endif 618 619// Objective-C++ features (opt-in) 620# if __has_feature(objc_arc) 621# define _LIBCPP_HAS_OBJC_ARC 622# endif 623 624# if __has_feature(objc_arc_weak) 625# define _LIBCPP_HAS_OBJC_ARC_WEAK 626# endif 627 628# if __has_extension(blocks) 629# define _LIBCPP_HAS_EXTENSION_BLOCKS 630# endif 631 632# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 633# define _LIBCPP_HAS_BLOCKS_RUNTIME 634# endif 635 636# if !__has_feature(address_sanitizer) 637# define _LIBCPP_HAS_NO_ASAN 638# endif 639 640// Allow for build-time disabling of unsigned integer sanitization 641# if __has_attribute(no_sanitize) 642# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 643# endif 644 645# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 646 647# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 648 649# elif defined(_LIBCPP_COMPILER_GCC) 650 651# if !defined(__SANITIZE_ADDRESS__) 652# define _LIBCPP_HAS_NO_ASAN 653# endif 654 655# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 656 657# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 658 659# endif // _LIBCPP_COMPILER_[CLANG|GCC] 660 661# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 662 663# ifdef _DLL 664# define _LIBCPP_CRT_FUNC __declspec(dllimport) 665# else 666# define _LIBCPP_CRT_FUNC 667# endif 668 669# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 670# define _LIBCPP_DLL_VIS 671# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 672# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 673# define _LIBCPP_OVERRIDABLE_FUNC_VIS 674# define _LIBCPP_EXPORTED_FROM_ABI 675# elif defined(_LIBCPP_BUILDING_LIBRARY) 676# define _LIBCPP_DLL_VIS __declspec(dllexport) 677# if defined(__MINGW32__) 678# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 679# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 680# else 681# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 682# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 683# endif 684# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 685# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 686# else 687# define _LIBCPP_DLL_VIS __declspec(dllimport) 688# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 689# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 690# define _LIBCPP_OVERRIDABLE_FUNC_VIS 691# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 692# endif 693 694# define _LIBCPP_HIDDEN 695# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 696# define _LIBCPP_TEMPLATE_VIS 697# define _LIBCPP_TEMPLATE_DATA_VIS 698# define _LIBCPP_ENUM_VIS 699 700# else 701 702# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 703# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) 704# else 705# define _LIBCPP_VISIBILITY(vis) 706# endif 707 708# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") 709# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") 710# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") 711# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") 712# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 713 714// TODO: Make this a proper customization point or remove the option to override it. 715# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 716# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") 717# endif 718 719# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 720// The inline should be removed once PR32114 is resolved 721# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 722# else 723# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 724# endif 725 726# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 727# if __has_attribute(__type_visibility__) 728# define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default"))) 729# else 730# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 731# endif 732# else 733# define _LIBCPP_TEMPLATE_VIS 734# endif 735 736# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 737# define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default"))) 738# else 739# define _LIBCPP_ENUM_VIS 740# endif 741 742# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 743 744# if __has_attribute(exclude_from_explicit_instantiation) 745# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 746# else 747// Try to approximate the effect of exclude_from_explicit_instantiation 748// (which is that entities are not assumed to be provided by explicit 749// template instantiations in the dylib) by always inlining those entities. 750# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 751# endif 752 753# if _LIBCPP_ENABLE_HARDENED_MODE 754# define _LIBCPP_HARDENING_SIG h 755# elif _LIBCPP_ENABLE_ASSERTIONS 756# define _LIBCPP_HARDENING_SIG s 757# elif _LIBCPP_ENABLE_DEBUG_MODE 758# define _LIBCPP_HARDENING_SIG d 759# else 760# define _LIBCPP_HARDENING_SIG u // for unchecked 761# endif 762 763# ifdef _LIBCPP_HAS_NO_EXCEPTIONS 764# define _LIBCPP_EXCEPTIONS_SIG n 765# else 766# define _LIBCPP_EXCEPTIONS_SIG e 767# endif 768 769# define _LIBCPP_ODR_SIGNATURE \ 770 _LIBCPP_CONCAT(_LIBCPP_CONCAT(_LIBCPP_HARDENING_SIG, _LIBCPP_EXCEPTIONS_SIG), _LIBCPP_VERSION) 771 772// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved 773// on two levels: 774// 1. The symbol is given hidden visibility, which ensures that users won't start exporting 775// symbols from their dynamic library by means of using the libc++ headers. This ensures 776// that those symbols stay private to the dynamic library in which it is defined. 777// 778// 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library. 779// This ensures that no ODR violation can arise from mixing two TUs compiled with different 780// versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the 781// program contains two definitions of a function, the ODR requires them to be token-by-token 782// equivalent, and the linker is allowed to pick either definition and discard the other one. 783// 784// For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled 785// *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs 786// compiled with different settings), the two definitions are both visible by the linker and they 787// have the same name, but they have a meaningfully different implementation (one throws an exception 788// and the other aborts the program). This violates the ODR and makes the program ill-formed, and in 789// practice what will happen is that the linker will pick one of the definitions at random and will 790// discard the other one. This can quite clearly lead to incorrect program behavior. 791// 792// A similar reasoning holds for many other properties that are ODR-affecting. Essentially any 793// property that causes the code of a function to differ from the code in another configuration 794// can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI 795// tag, but we encode the ones that we think are most important: library version, exceptions, and 796// hardening mode. 797// 798// Note that historically, solving this problem has been achieved in various ways, including 799// force-inlining all functions or giving internal linkage to all functions. Both these previous 800// solutions suffer from drawbacks that lead notably to code bloat. 801// 802// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend 803// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. 804// 805// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions 806// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled 807// name of a virtual function is part of its ABI, since some architectures like arm64e can sign 808// the virtual function pointer in the vtable based on the mangled name of the function. Since 809// we use an ABI tag that changes with each released version, the mangled name of the virtual 810// function would change, which is incorrect. Note that it doesn't make much sense to change 811// the implementation of a virtual function in an ABI-incompatible way in the first place, 812// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable. 813// 814// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing 815// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and 816// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. 817# ifndef _LIBCPP_NO_ABI_TAG 818# define _LIBCPP_HIDE_FROM_ABI \ 819 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ 820 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_ODR_SIGNATURE)))) 821# else 822# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 823# endif 824# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 825 826// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern 827// "C" function, as those lack mangling. 828# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 829 830# ifdef _LIBCPP_BUILDING_LIBRARY 831# if _LIBCPP_ABI_VERSION > 1 832# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 833# else 834# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 835# endif 836# else 837# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 838# endif 839 840// Just so we can migrate to the new macros gradually. 841# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 842 843// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 844// clang-format off 845# define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 846# define _LIBCPP_END_NAMESPACE_STD }} 847# define _VSTD std 848 849_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 850 851# if _LIBCPP_STD_VER >= 17 852# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 853 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 854# else 855# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 856 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 857# endif 858 859# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} 860// clang-format on 861 862# define _VSTD_FS std::__fs::filesystem 863 864# if __has_attribute(__enable_if__) 865# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 866# endif 867 868# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER) 869# define _LIBCPP_HAS_NO_INT128 870# endif 871 872# if __has_attribute(__malloc__) 873# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 874# else 875# define _LIBCPP_NOALIAS 876# endif 877 878# if __has_attribute(__using_if_exists__) 879# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__)) 880# else 881# define _LIBCPP_USING_IF_EXISTS 882# endif 883 884# ifdef _LIBCPP_CXX03_LANG 885# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 886 struct _LIBCPP_EXPORTED_FROM_ABI x { \ 887 enum __lx 888// clang-format off 889# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 890 __lx __v_; \ 891 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 892 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 893 _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \ 894 }; 895// clang-format on 896 897# else // _LIBCPP_CXX03_LANG 898# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 899# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 900# endif // _LIBCPP_CXX03_LANG 901 902# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__NetBSD__) 903# define _LIBCPP_LOCALE__L_EXTENSIONS 1 904# endif 905 906# ifdef __FreeBSD__ 907# define _DECLARE_C99_LDBL_MATH 1 908# endif 909 910// If we are getting operator new from the MSVC CRT, then allocation overloads 911// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 912# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 913# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 914# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 915// We're deferring to Microsoft's STL to provide aligned new et al. We don't 916// have it unless the language feature test macro is defined. 917# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 918# elif defined(__MVS__) 919# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 920# endif 921 922# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 923# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 924# endif 925 926// It is not yet possible to use aligned_alloc() on all Apple platforms since 927// 10.15 was the first version to ship an implementation of aligned_alloc(). 928# if defined(__APPLE__) 929# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ 930 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) 931# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 932# endif 933# elif defined(__ANDROID__) && __ANDROID_API__ < 28 934// Android only provides aligned_alloc when targeting API 28 or higher. 935# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 936# endif 937 938# if defined(__APPLE__) || defined(__FreeBSD__) 939# define _LIBCPP_HAS_DEFAULTRUNELOCALE 940# endif 941 942# if defined(__APPLE__) || defined(__FreeBSD__) 943# define _LIBCPP_WCTYPE_IS_MASK 944# endif 945 946# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 947# define _LIBCPP_HAS_NO_CHAR8_T 948# endif 949 950// Deprecation macros. 951// 952// Deprecations warnings are always enabled, except when users explicitly opt-out 953// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 954# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 955# if __has_attribute(__deprecated__) 956# define _LIBCPP_DEPRECATED __attribute__((__deprecated__)) 957# define _LIBCPP_DEPRECATED_(m) __attribute__((__deprecated__(m))) 958# elif _LIBCPP_STD_VER >= 14 959# define _LIBCPP_DEPRECATED [[deprecated]] 960# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] 961# else 962# define _LIBCPP_DEPRECATED 963# define _LIBCPP_DEPRECATED_(m) 964# endif 965# else 966# define _LIBCPP_DEPRECATED 967# define _LIBCPP_DEPRECATED_(m) 968# endif 969 970# if !defined(_LIBCPP_CXX03_LANG) 971# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 972# else 973# define _LIBCPP_DEPRECATED_IN_CXX11 974# endif 975 976# if _LIBCPP_STD_VER >= 14 977# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 978# else 979# define _LIBCPP_DEPRECATED_IN_CXX14 980# endif 981 982# if _LIBCPP_STD_VER >= 17 983# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 984# else 985# define _LIBCPP_DEPRECATED_IN_CXX17 986# endif 987 988# if _LIBCPP_STD_VER >= 20 989# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 990# else 991# define _LIBCPP_DEPRECATED_IN_CXX20 992# endif 993 994# if _LIBCPP_STD_VER >= 23 995# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED 996# else 997# define _LIBCPP_DEPRECATED_IN_CXX23 998# endif 999 1000# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 1001# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 1002# else 1003# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 1004# endif 1005 1006// Macros to enter and leave a state where deprecation warnings are suppressed. 1007# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 1008# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 1009 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 1010 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 1011# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 1012# else 1013# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1014# define _LIBCPP_SUPPRESS_DEPRECATED_POP 1015# endif 1016 1017# if _LIBCPP_STD_VER <= 11 1018# define _LIBCPP_EXPLICIT_SINCE_CXX14 1019# else 1020# define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit 1021# endif 1022 1023# if _LIBCPP_STD_VER >= 23 1024# define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit 1025# else 1026# define _LIBCPP_EXPLICIT_SINCE_CXX23 1027# endif 1028 1029# if _LIBCPP_STD_VER >= 14 1030# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr 1031# else 1032# define _LIBCPP_CONSTEXPR_SINCE_CXX14 1033# endif 1034 1035# if _LIBCPP_STD_VER >= 17 1036# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr 1037# else 1038# define _LIBCPP_CONSTEXPR_SINCE_CXX17 1039# endif 1040 1041# if _LIBCPP_STD_VER >= 20 1042# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr 1043# else 1044# define _LIBCPP_CONSTEXPR_SINCE_CXX20 1045# endif 1046 1047# if _LIBCPP_STD_VER >= 23 1048# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr 1049# else 1050# define _LIBCPP_CONSTEXPR_SINCE_CXX23 1051# endif 1052 1053# if __has_cpp_attribute(nodiscard) 1054# define _LIBCPP_NODISCARD [[__nodiscard__]] 1055# else 1056// We can't use GCC's [[gnu::warn_unused_result]] and 1057// __attribute__((warn_unused_result)), because GCC does not silence them via 1058// (void) cast. 1059# define _LIBCPP_NODISCARD 1060# endif 1061 1062// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1063// specified as such as an extension. 1064# if !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1065# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1066# else 1067# define _LIBCPP_NODISCARD_EXT 1068# endif 1069 1070# if _LIBCPP_STD_VER >= 20 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1071# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1072# else 1073# define _LIBCPP_NODISCARD_AFTER_CXX17 1074# endif 1075 1076# if __has_attribute(__no_destroy__) 1077# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1078# else 1079# define _LIBCPP_NO_DESTROY 1080# endif 1081 1082# ifndef _LIBCPP_HAS_NO_ASAN 1083 extern "C" _LIBCPP_EXPORTED_FROM_ABI void 1084 __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); 1085# if _LIBCPP_CLANG_VER >= 1600 1086extern "C" _LIBCPP_EXPORTED_FROM_ABI void __sanitizer_annotate_double_ended_contiguous_container( 1087 const void*, const void*, const void*, const void*, const void*, const void*); 1088extern "C" _LIBCPP_EXPORTED_FROM_ABI int 1089__sanitizer_verify_double_ended_contiguous_container(const void*, const void*, const void*, const void*); 1090# endif 1091# endif 1092 1093// Try to find out if RTTI is disabled. 1094# if !defined(__cpp_rtti) || __cpp_rtti < 199711L 1095# define _LIBCPP_HAS_NO_RTTI 1096# endif 1097 1098# ifndef _LIBCPP_WEAK 1099# define _LIBCPP_WEAK __attribute__((__weak__)) 1100# endif 1101 1102// Thread API 1103// clang-format off 1104# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1105 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1106 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1107 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1108 1109# if defined(__FreeBSD__) || \ 1110 defined(__wasi__) || \ 1111 defined(__NetBSD__) || \ 1112 defined(__OpenBSD__) || \ 1113 defined(__NuttX__) || \ 1114 defined(__linux__) || \ 1115 defined(__GNU__) || \ 1116 defined(__APPLE__) || \ 1117 defined(__MVS__) || \ 1118 defined(_AIX) || \ 1119 defined(__EMSCRIPTEN__) 1120// clang-format on 1121# define _LIBCPP_HAS_THREAD_API_PTHREAD 1122# elif defined(__Fuchsia__) 1123// TODO(44575): Switch to C11 thread API when possible. 1124# define _LIBCPP_HAS_THREAD_API_PTHREAD 1125# elif defined(_LIBCPP_WIN32API) 1126# define _LIBCPP_HAS_THREAD_API_WIN32 1127# else 1128# error "No thread API" 1129# endif // _LIBCPP_HAS_THREAD_API 1130# endif // _LIBCPP_HAS_NO_THREADS 1131 1132# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1133# if defined(__ANDROID__) && __ANDROID_API__ >= 30 1134# define _LIBCPP_HAS_COND_CLOCKWAIT 1135# elif defined(_LIBCPP_GLIBC_PREREQ) 1136# if _LIBCPP_GLIBC_PREREQ(2, 30) 1137# define _LIBCPP_HAS_COND_CLOCKWAIT 1138# endif 1139# endif 1140# endif 1141 1142# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1143# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1144 _LIBCPP_HAS_NO_THREADS is not defined. 1145# endif 1146 1147# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1148# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1149 _LIBCPP_HAS_NO_THREADS is defined. 1150# endif 1151 1152# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1153# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1154 _LIBCPP_HAS_NO_THREADS is defined. 1155# endif 1156 1157# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1158# define __STDCPP_THREADS__ 1 1159# endif 1160 1161// The glibc and Bionic implementation of pthreads implements 1162// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1163// mutexes have no destroy mechanism. 1164// 1165// This optimization can't be performed on Apple platforms, where 1166// pthread_mutex_destroy can allow the kernel to release resources. 1167// See https://llvm.org/D64298 for details. 1168// 1169// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1170// respective stakeholders. 1171// clang-format off 1172# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 1173 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1174 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1175// clang-format on 1176# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1177# endif 1178 1179// Destroying a condvar is a nop on Windows. 1180// 1181// This optimization can't be performed on Apple platforms, where 1182// pthread_cond_destroy can allow the kernel to release resources. 1183// See https://llvm.org/D64298 for details. 1184// 1185// TODO(EricWF): This is potentially true for some pthread implementations 1186// as well. 1187# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1188# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1189# endif 1190 1191// Some systems do not provide gets() in their C library, for security reasons. 1192# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) 1193# define _LIBCPP_C_HAS_NO_GETS 1194# endif 1195 1196# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 1197 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1198# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1199# endif 1200 1201# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1202# define _LIBCPP_HAS_C_ATOMIC_IMP 1203# elif defined(_LIBCPP_COMPILER_GCC) 1204# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1205# endif 1206 1207# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1208 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1209# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1210# else 1211# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1212# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1213# endif 1214# ifdef _LIBCPP_FREESTANDING 1215# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1216# endif 1217# endif 1218 1219# ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1220# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1221# endif 1222 1223# if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(__no_thread_safety_analysis__) 1224# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((__no_thread_safety_analysis__)) 1225# else 1226# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS 1227# endif 1228 1229# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1230# if defined(__clang__) && __has_attribute(acquire_capability) 1231// Work around the attribute handling in clang. When both __declspec and 1232// __attribute__ are present, the processing goes awry preventing the definition 1233// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1234// combining the two does work. 1235# if !defined(_MSC_VER) 1236# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1237# endif 1238# endif 1239# endif 1240 1241# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1242# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1243# else 1244# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1245# endif 1246 1247# if _LIBCPP_STD_VER >= 20 1248# define _LIBCPP_CONSTINIT constinit 1249# elif __has_attribute(__require_constant_initialization__) 1250# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1251# else 1252# define _LIBCPP_CONSTINIT 1253# endif 1254 1255# if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1256# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning"))) 1257# else 1258# define _LIBCPP_DIAGNOSE_WARNING(...) 1259# endif 1260 1261// Use a function like macro to imply that it must be followed by a semicolon 1262# if __has_cpp_attribute(fallthrough) 1263# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1264# elif __has_attribute(__fallthrough__) 1265# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1266# else 1267# define _LIBCPP_FALLTHROUGH() ((void)0) 1268# endif 1269 1270# if __has_cpp_attribute(_Clang::__lifetimebound__) 1271# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]] 1272# else 1273# define _LIBCPP_LIFETIMEBOUND 1274# endif 1275 1276# if __has_attribute(__nodebug__) 1277# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1278# else 1279# define _LIBCPP_NODEBUG 1280# endif 1281 1282# if __has_attribute(__standalone_debug__) 1283# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1284# else 1285# define _LIBCPP_STANDALONE_DEBUG 1286# endif 1287 1288# if __has_attribute(__preferred_name__) 1289# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1290# else 1291# define _LIBCPP_PREFERRED_NAME(x) 1292# endif 1293 1294# if __has_attribute(__no_sanitize__) 1295# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__))) 1296# else 1297# define _LIBCPP_NO_SANITIZE(...) 1298# endif 1299 1300// We often repeat things just for handling wide characters in the library. 1301// When wide characters are disabled, it can be useful to have a quick way of 1302// disabling it without having to resort to #if-#endif, which has a larger 1303// impact on readability. 1304# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1305# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1306# else 1307# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1308# endif 1309 1310# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases) 1311# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1312# else 1313# define _LIBCPP_DECLSPEC_EMPTY_BASES 1314# endif 1315 1316# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1317# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1318# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1319# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1320# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1321# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1322# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1323 1324# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1325# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1326# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION 1327# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1328# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1329# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1330# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1331# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1332 1333// clang-format off 1334# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh()\")") _Pragma("push_macro(\"move(int, int)\")") _Pragma("push_macro(\"erase()\")") 1335# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh()\")") _Pragma("pop_macro(\"move(int, int)\")") _Pragma("pop_macro(\"erase()\")") 1336// clang-format on 1337 1338# ifndef _LIBCPP_NO_AUTO_LINK 1339# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1340# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1341# pragma comment(lib, "c++.lib") 1342# else 1343# pragma comment(lib, "libc++.lib") 1344# endif 1345# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1346# endif // _LIBCPP_NO_AUTO_LINK 1347 1348// Configures the fopen close-on-exec mode character, if any. This string will 1349// be appended to any mode string used by fstream for fopen/fdopen. 1350// 1351// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1352// do. 1353# if defined(__BIONIC__) 1354# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1355# else 1356# define _LIBCPP_FOPEN_CLOEXEC_MODE 1357# endif 1358 1359// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1360// of functions used in cstdio may not be available for low API levels when 1361// using 64-bit file offsets on LP32. 1362# if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1363# define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1364# endif 1365 1366# if __has_attribute(__init_priority__) 1367# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100))) 1368# else 1369# define _LIBCPP_INIT_PRIORITY_MAX 1370# endif 1371 1372# if __has_attribute(__format__) 1373// The attribute uses 1-based indices for ordinary and static member functions. 1374// The attribute uses 2-based indices for non-static member functions. 1375# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1376 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1377# else 1378# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1379# endif 1380 1381# if __has_cpp_attribute(msvc::no_unique_address) 1382// MSVC implements [[no_unique_address]] as a silent no-op currently. 1383// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1384// However, MSVC implements [[msvc::no_unique_address]] which does what 1385// [[no_unique_address]] is supposed to do, in general. 1386 1387// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1388// [[msvc::no_unique_address]] though. If/when it does implement 1389// [[msvc::no_unique_address]], this should be preferred though. 1390# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1391# elif __has_cpp_attribute(no_unique_address) 1392# define _LIBCPP_NO_UNIQUE_ADDRESS [[__no_unique_address__]] 1393# else 1394# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1395// Note that this can be replaced by #error as soon as clang-cl 1396// implements msvc::no_unique_address, since there should be no C++20 1397// compiler that doesn't support one of the two attributes at that point. 1398// We generally don't want to use this macro outside of C++20-only code, 1399// because using it conditionally in one language version only would make 1400// the ABI inconsistent. 1401# endif 1402 1403# ifdef _LIBCPP_COMPILER_CLANG_BASED 1404# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1405# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1406# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1407# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1408# elif defined(_LIBCPP_COMPILER_GCC) 1409# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1410# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1411# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1412# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1413# else 1414# define _LIBCPP_DIAGNOSTIC_PUSH 1415# define _LIBCPP_DIAGNOSTIC_POP 1416# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1417# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1418# endif 1419 1420# if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) 1421# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") 1422# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") 1423# else 1424# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ 1425# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ 1426# endif 1427 1428# if __has_attribute(__packed__) 1429# define _LIBCPP_PACKED __attribute__((__packed__)) 1430# else 1431# define _LIBCPP_PACKED 1432# endif 1433 1434// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these 1435// functions is gradually being added to existing C libraries. The conditions 1436// below check for known C library versions and conditions under which these 1437// functions are declared by the C library. 1438# define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1439// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if 1440// __cpp_char8_t is defined or if C2X extensions are enabled. Determining 1441// the latter depends on internal GNU libc details that are not appropriate 1442// to depend on here, so any declarations present when __cpp_char8_t is not 1443// defined are ignored. 1444# if defined(_LIBCPP_GLIBC_PREREQ) 1445# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) 1446# undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1447# endif 1448# endif 1449 1450// There are a handful of public standard library types that are intended to 1451// support CTAD but don't need any explicit deduction guides to do so. This 1452// macro is used to mark them as such, which suppresses the 1453// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code 1454// with these classes. 1455# if _LIBCPP_STD_VER >= 17 1456# ifdef _LIBCPP_COMPILER_CLANG_BASED 1457# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \ 1458 template <class... _Tag> \ 1459 [[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...> 1460# else 1461# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \ 1462 template <class... _Tag> \ 1463 ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...> 1464# endif 1465# else 1466# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "") 1467# endif 1468 1469// TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use 1470// compiler intrinsics in the Objective-C++ mode. 1471# ifdef __OBJC__ 1472# define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS 1473# endif 1474 1475# define _PSTL_PRAGMA(x) _Pragma(#x) 1476 1477// Enable SIMD for compilers that support OpenMP 4.0 1478# if (defined(_OPENMP) && _OPENMP >= 201307) 1479 1480# define _PSTL_UDR_PRESENT 1481# define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd) 1482# define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd) 1483# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM)) 1484# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM)) 1485# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM)) 1486# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM)) 1487 1488// Declaration of reduction functor, where 1489// NAME - the name of the functor 1490// OP - type of the callable object with the reduction operation 1491// omp_in - refers to the local partial result 1492// omp_out - refers to the final value of the combiner operator 1493// omp_priv - refers to the private copy of the initial value 1494// omp_orig - refers to the original variable to be reduced 1495# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \ 1496 _PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig)) 1497 1498# else // (defined(_OPENMP) && _OPENMP >= 201307) 1499 1500# define _PSTL_PRAGMA_SIMD 1501# define _PSTL_PRAGMA_DECLARE_SIMD 1502# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) 1503# define _PSTL_PRAGMA_SIMD_SCAN(PRM) 1504# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1505# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1506# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1507 1508# endif // (defined(_OPENMP) && _OPENMP >= 201307) 1509 1510# define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED 1511 1512#endif // __cplusplus 1513 1514#endif // _LIBCPP___CONFIG 1515