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#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 16# pragma GCC system_header 17#endif 18 19#if defined(__apple_build_version__) 20// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403) 21# define _LIBCPP_COMPILER_CLANG_BASED 22# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 23#elif defined(__clang__) 24# define _LIBCPP_COMPILER_CLANG_BASED 25# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 26#elif defined(__GNUC__) 27# define _LIBCPP_COMPILER_GCC 28# define _LIBCPP_GCC_VER (__GNUC__ * 100 + __GNUC_MINOR__) 29#endif 30 31#ifdef __cplusplus 32 33// Warn if a compiler version is used that is not supported anymore 34// LLVM RELEASE Update the minimum compiler versions 35# if defined(_LIBCPP_CLANG_VER) 36# if _LIBCPP_CLANG_VER < 1600 37# warning "Libc++ only supports Clang 16 and later" 38# endif 39# elif defined(_LIBCPP_APPLE_CLANG_VER) 40# if _LIBCPP_APPLE_CLANG_VER < 1500 41# warning "Libc++ only supports AppleClang 15 and later" 42# endif 43# elif defined(_LIBCPP_GCC_VER) 44# if _LIBCPP_GCC_VER < 1300 45# warning "Libc++ only supports GCC 13 and later" 46# endif 47# endif 48 49// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html 50 51// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM. 52// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is 53// defined to XXYYZZ. 54# define _LIBCPP_VERSION 180000 55 56# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y 57# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) 58 59# if __STDC_HOSTED__ == 0 60# define _LIBCPP_FREESTANDING 61# endif 62 63// NOLINTBEGIN(libcpp-cpp-version-check) 64# ifndef _LIBCPP_STD_VER 65# if __cplusplus <= 201103L 66# define _LIBCPP_STD_VER 11 67# elif __cplusplus <= 201402L 68# define _LIBCPP_STD_VER 14 69# elif __cplusplus <= 201703L 70# define _LIBCPP_STD_VER 17 71# elif __cplusplus <= 202002L 72# define _LIBCPP_STD_VER 20 73# elif __cplusplus <= 202302L 74# define _LIBCPP_STD_VER 23 75# else 76// Expected release year of the next C++ standard 77# define _LIBCPP_STD_VER 26 78# endif 79# endif // _LIBCPP_STD_VER 80// NOLINTEND(libcpp-cpp-version-check) 81 82# if defined(__ELF__) 83# define _LIBCPP_OBJECT_FORMAT_ELF 1 84# elif defined(__MACH__) 85# define _LIBCPP_OBJECT_FORMAT_MACHO 1 86# elif defined(_WIN32) 87# define _LIBCPP_OBJECT_FORMAT_COFF 1 88# elif defined(__wasm__) 89# define _LIBCPP_OBJECT_FORMAT_WASM 1 90# elif defined(_AIX) 91# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 92# else 93// ... add new file formats here ... 94# endif 95 96// ABI { 97 98# if _LIBCPP_ABI_VERSION >= 2 99// Change short string representation so that string data starts at offset 0, 100// improving its alignment in some cases. 101# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 102// Fix deque iterator type in order to support incomplete types. 103# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 104// Fix undefined behavior in how std::list stores its linked nodes. 105# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 106// Fix undefined behavior in how __tree stores its end and parent nodes. 107# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 108// Fix undefined behavior in how __hash_table stores its pointer types. 109# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 110# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 111# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 112// Define a key function for `bad_function_call` in the library, to centralize 113// its vtable and typeinfo to libc++ rather than having all other libraries 114// using that class define their own copies. 115# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 116// Override the default return value of exception::what() for 117// bad_function_call::what() with a string that is specific to 118// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 119// because it changes the vtable layout of bad_function_call. 120# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 121// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 122# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 123// Give reverse_iterator<T> one data member of type T, not two. 124// Also, in C++17 and later, don't derive iterator types from std::iterator. 125# define _LIBCPP_ABI_NO_ITERATOR_BASES 126// Use the smallest possible integer type to represent the index of the variant. 127// Previously libc++ used "unsigned int" exclusively. 128# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 129// Unstable attempt to provide a more optimized std::function 130# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 131// All the regex constants must be distinct and nonzero. 132# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 133// Re-worked external template instantiations for std::string with a focus on 134// performance and fast-path inlining. 135# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 136// Enable clang::trivial_abi on std::unique_ptr. 137# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 138// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 139# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 140// std::random_device holds some state when it uses an implementation that gets 141// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 142// implementation to another one on a platform that has already shipped 143// std::random_device, one needs to retain the same object layout to remain ABI 144// compatible. This switch removes these workarounds for platforms that don't care 145// about ABI compatibility. 146# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 147// Don't export the legacy __basic_string_common class and its methods from the built library. 148# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 149// Don't export the legacy __vector_base_common class and its methods from the built library. 150# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 151// According to the Standard, `bitset::operator[] const` returns bool 152# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 153// Fix the implementation of CityHash used for std::hash<fundamental-type>. 154// This is an ABI break because `std::hash` will return a different result, 155// which means that hashing the same object in translation units built against 156// different versions of libc++ can return inconsistent results. This is especially 157// tricky since std::hash is used in the implementation of unordered containers. 158// 159// The incorrect implementation of CityHash has the problem that it drops some 160// bits on the floor. 161# define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION 162// Remove the base 10 implementation of std::to_chars from the dylib. 163// The implementation moved to the header, but we still export the symbols from 164// the dylib for backwards compatibility. 165# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 166// Save memory by providing the allocator more freedom to allocate the most 167// efficient size class by dropping the alignment requirements for std::string's 168// pointer from 16 to 8. This changes the output of std::string::max_size, 169// which makes it ABI breaking 170# define _LIBCPP_ABI_STRING_8_BYTE_ALIGNMENT 171# elif _LIBCPP_ABI_VERSION == 1 172# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 173// Enable compiling copies of now inline methods into the dylib to support 174// applications compiled against older libraries. This is unnecessary with 175// COFF dllexport semantics, since dllexport forces a non-inline definition 176// of inline functions to be emitted anyway. Our own non-inline copy would 177// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 178// the linker will take issue with the symbols in the shared object if the 179// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 180// so disable it. 181# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 182# endif 183// Feature macros for disabling pre ABI v1 features. All of these options 184// are deprecated. 185# if defined(__FreeBSD__) && __FreeBSD__ < 14 186# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 187# endif 188// For XCOFF linkers, we have problems if we see a weak hidden version of a symbol 189// in user code (like you get with -fvisibility-inlines-hidden) and then a strong def 190// in the library, so we need to always rely on the library version. 191# if defined(_AIX) 192# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 193# endif 194# endif 195 196# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 197// Define a key function for `bad_function_call` in the library, to centralize 198// its vtable and typeinfo to libc++ rather than having all other libraries 199// using that class define their own copies. 200# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 201# endif 202 203// We had some bugs where we use [[no_unique_address]] together with construct_at, 204// which causes UB as the call on construct_at could write to overlapping subobjects 205// 206// https://github.com/llvm/llvm-project/issues/70506 207// https://github.com/llvm/llvm-project/issues/70494 208// 209// To fix the bug we had to change the ABI of some classes to remove [[no_unique_address]] under certain conditions. 210// The below macro is used for all classes whose ABI have changed as part of fixing these bugs. 211# define _LIBCPP_ABI_2023_OVERLAPPING_SUBOBJECT_FIX_TAG __attribute__((__abi_tag__("subobj_fix_2023"))) 212 213// Changes the iterator type of select containers (see below) to a bounded iterator that keeps track of whether it's 214// within the bounds of the original container and asserts it on every dereference. 215// 216// ABI impact: changes the iterator type of the relevant containers. 217// 218// Supported containers: 219// - `span`; 220// - `string_view`; 221// - `array`. 222// #define _LIBCPP_ABI_BOUNDED_ITERATORS 223 224// } ABI 225 226// HARDENING { 227 228// TODO(hardening): deprecate this in LLVM 19. 229// This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes) 230// equivalent to setting the extensive mode. 231# ifdef _LIBCPP_ENABLE_ASSERTIONS 232# if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1 233# error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1" 234# endif 235# if _LIBCPP_ENABLE_ASSERTIONS 236# define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_EXTENSIVE 237# endif 238# endif 239 240// The library provides the macro `_LIBCPP_HARDENING_MODE` which can be set to one of the following values: 241// 242// - `_LIBCPP_HARDENING_MODE_NONE`; 243// - `_LIBCPP_HARDENING_MODE_FAST`; 244// - `_LIBCPP_HARDENING_MODE_EXTENSIVE`; 245// - `_LIBCPP_HARDENING_MODE_DEBUG`. 246// 247// These values have the following effects: 248// 249// - `_LIBCPP_HARDENING_MODE_NONE` -- sets the hardening mode to "none" which disables all runtime hardening checks; 250// 251// - `_LIBCPP_HARDENING_MODE_FAST` -- sets that hardening mode to "fast". The fast mode enables security-critical checks 252// that can be done with relatively little runtime overhead in constant time; 253// 254// - `_LIBCPP_HARDENING_MODE_EXTENSIVE` -- sets the hardening mode to "extensive". The extensive mode is a superset of 255// the fast mode that additionally enables checks that are relatively cheap and prevent common types of logic errors 256// but are not necessarily security-critical; 257// 258// - `_LIBCPP_HARDENING_MODE_DEBUG` -- sets the hardening mode to "debug". The debug mode is a superset of the extensive 259// mode and enables all checks available in the library, including internal assertions. Checks that are part of the 260// debug mode can be very expensive and thus the debug mode is intended to be used for testing, not in production. 261 262// Inside the library, assertions are categorized so they can be cherry-picked based on the chosen hardening mode. These 263// macros are only for internal use -- users should only pick one of the high-level hardening modes described above. 264// 265// - `_LIBCPP_ASSERT_VALID_INPUT_RANGE` -- checks that ranges (whether expressed as an iterator pair, an iterator and 266// a sentinel, an iterator and a count, or a `std::range`) given as input to library functions are valid: 267// - the sentinel is reachable from the begin iterator; 268// - TODO(hardening): both iterators refer to the same container. 269// 270// - `_LIBCPP_ASSERT_VALID_ELEMENT_ACCESS` -- checks that any attempts to access a container element, whether through 271// the container object or through an iterator, are valid and do not attempt to go out of bounds or otherwise access 272// a non-existent element. For iterator checks to work, bounded iterators must be enabled in the ABI. Types like 273// `optional` and `function` are considered one-element containers for the purposes of this check. 274// 275// - `_LIBCPP_ASSERT_NON_NULL` -- checks that the pointer being dereferenced is not null. On most modern platforms zero 276// address does not refer to an actual location in memory, so a null pointer dereference would not compromize the 277// memory security of a program (however, it is still undefined behavior that can result in strange errors due to 278// compiler optimizations). 279// 280// - `_LIBCPP_ASSERT_NON_OVERLAPPING_RANGES` -- for functions that take several ranges as arguments, checks that the 281// given ranges do not overlap. 282// 283// - `_LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR` -- checks any operations that exchange nodes between containers to make sure 284// the containers have compatible allocators. 285// 286// - `_LIBCPP_ASSERT_INTERNAL` -- checks that internal invariants of the library hold. These assertions don't depend on 287// user input. 288// 289// - `_LIBCPP_ASSERT_UNCATEGORIZED` -- for assertions that haven't been properly classified yet. 290 291// clang-format off 292# define _LIBCPP_HARDENING_MODE_NONE (1 << 1) 293# define _LIBCPP_HARDENING_MODE_FAST (1 << 2) 294# define _LIBCPP_HARDENING_MODE_EXTENSIVE (1 << 4) // Deliberately not ordered. 295# define _LIBCPP_HARDENING_MODE_DEBUG (1 << 3) 296// clang-format on 297 298# ifndef _LIBCPP_HARDENING_MODE 299# define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_DEFAULT 300# endif 301 302# if _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_NONE && \ 303 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_FAST && \ 304 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_EXTENSIVE && \ 305 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_DEBUG 306# error _LIBCPP_HARDENING_MODE must be set to one of the following values: \ 307_LIBCPP_HARDENING_MODE_NONE, \ 308_LIBCPP_HARDENING_MODE_FAST, \ 309_LIBCPP_HARDENING_MODE_EXTENSIVE, \ 310_LIBCPP_HARDENING_MODE_DEBUG 311# endif 312 313// clang-format off 314// Fast hardening mode checks. 315 316# if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 317 318// Enabled checks. 319# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 320# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 321// Disabled checks. 322// On most modern platforms, dereferencing a null pointer does not lead to an actual memory access. 323# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSUME(expression) 324// Overlapping ranges will make algorithms produce incorrect results but don't directly lead to a security 325// vulnerability. 326# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSUME(expression) 327# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSUME(expression) 328# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 329# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSUME(expression) 330 331// Extensive hardening mode checks. 332 333# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE 334 335// Enabled checks. 336# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 337# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 338# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSERT(expression, message) 339# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSERT(expression, message) 340# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSERT(expression, message) 341# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSERT(expression, message) 342// Disabled checks. 343# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 344 345// Debug hardening mode checks. 346 347# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG 348 349// All checks enabled. 350# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 351# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 352# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSERT(expression, message) 353# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSERT(expression, message) 354# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSERT(expression, message) 355# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSERT(expression, message) 356# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSERT(expression, message) 357 358// Disable all checks if hardening is not enabled. 359 360# else 361 362// All checks disabled. 363# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSUME(expression) 364# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSUME(expression) 365# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSUME(expression) 366# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSUME(expression) 367# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSUME(expression) 368# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 369# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSUME(expression) 370 371# endif // _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 372// clang-format on 373 374// } HARDENING 375 376# define _LIBCPP_TOSTRING2(x) #x 377# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 378 379// NOLINTNEXTLINE(libcpp-cpp-version-check) 380# if __cplusplus < 201103L 381# define _LIBCPP_CXX03_LANG 382# endif 383 384# ifndef __has_attribute 385# define __has_attribute(__x) 0 386# endif 387 388# ifndef __has_builtin 389# define __has_builtin(__x) 0 390# endif 391 392# ifndef __has_extension 393# define __has_extension(__x) 0 394# endif 395 396# ifndef __has_feature 397# define __has_feature(__x) 0 398# endif 399 400# ifndef __has_cpp_attribute 401# define __has_cpp_attribute(__x) 0 402# endif 403 404# ifndef __has_constexpr_builtin 405# define __has_constexpr_builtin(x) 0 406# endif 407 408// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 409// the compiler and '1' otherwise. 410# ifndef __is_identifier 411# define __is_identifier(__x) 1 412# endif 413 414# ifndef __has_declspec_attribute 415# define __has_declspec_attribute(__x) 0 416# endif 417 418# define __has_keyword(__x) !(__is_identifier(__x)) 419 420# ifndef __has_include 421# define __has_include(...) 0 422# endif 423 424# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L 425# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" 426# endif 427 428// FIXME: ABI detection should be done via compiler builtin macros. This 429// is just a placeholder until Clang implements such macros. For now assume 430// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 431// and allow the user to explicitly specify the ABI to handle cases where this 432// heuristic falls short. 433# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 434# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 435# elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 436# define _LIBCPP_ABI_ITANIUM 437# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 438# define _LIBCPP_ABI_MICROSOFT 439# else 440# if defined(_WIN32) && defined(_MSC_VER) 441# define _LIBCPP_ABI_MICROSOFT 442# else 443# define _LIBCPP_ABI_ITANIUM 444# endif 445# endif 446 447# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 448# define _LIBCPP_ABI_VCRUNTIME 449# endif 450 451# if __has_feature(experimental_library) 452# ifndef _LIBCPP_ENABLE_EXPERIMENTAL 453# define _LIBCPP_ENABLE_EXPERIMENTAL 454# endif 455# endif 456 457// Incomplete features get their own specific disabling flags. This makes it 458// easier to grep for target specific flags once the feature is complete. 459# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) 460# define _LIBCPP_HAS_NO_INCOMPLETE_PSTL 461# define _LIBCPP_HAS_NO_EXPERIMENTAL_STOP_TOKEN 462# define _LIBCPP_HAS_NO_INCOMPLETE_TZDB 463# define _LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM 464# endif 465 466// Need to detect which libc we're using if we're on Linux. 467# if defined(__linux__) 468# include <features.h> 469# if defined(__GLIBC_PREREQ) 470# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 471# else 472# define _LIBCPP_GLIBC_PREREQ(a, b) 0 473# endif // defined(__GLIBC_PREREQ) 474# endif // defined(__linux__) 475 476# if defined(__MVS__) 477# include <features.h> // for __NATIVE_ASCII_F 478# endif 479 480# ifndef __BYTE_ORDER__ 481# error \ 482 "Your compiler doesn't seem to define __BYTE_ORDER__, which is required by libc++ to know the endianness of your target platform" 483# endif 484 485# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 486# define _LIBCPP_LITTLE_ENDIAN 487# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 488# define _LIBCPP_BIG_ENDIAN 489# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 490 491# if defined(_WIN32) 492# define _LIBCPP_WIN32API 493# define _LIBCPP_SHORT_WCHAR 1 494// Both MinGW and native MSVC provide a "MSVC"-like environment 495# define _LIBCPP_MSVCRT_LIKE 496// If mingw not explicitly detected, assume using MS C runtime only if 497// a MS compatibility version is specified. 498# if defined(_MSC_VER) && !defined(__MINGW32__) 499# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 500# endif 501# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 502# define _LIBCPP_HAS_BITSCAN64 503# endif 504# define _LIBCPP_HAS_OPEN_WITH_WCHAR 505# endif // defined(_WIN32) 506 507# if defined(_AIX) && !defined(__64BIT__) 508// The size of wchar is 2 byte on 32-bit mode on AIX. 509# define _LIBCPP_SHORT_WCHAR 1 510# endif 511 512// Libc++ supports various implementations of std::random_device. 513// 514// _LIBCPP_USING_DEV_RANDOM 515// Read entropy from the given file, by default `/dev/urandom`. 516// If a token is provided, it is assumed to be the path to a file 517// to read entropy from. This is the default behavior if nothing 518// else is specified. This implementation requires storing state 519// inside `std::random_device`. 520// 521// _LIBCPP_USING_ARC4_RANDOM 522// Use arc4random(). This allows obtaining random data even when 523// using sandboxing mechanisms. On some platforms like Apple, this 524// is the recommended source of entropy for user-space programs. 525// When this option is used, the token passed to `std::random_device`'s 526// constructor *must* be "/dev/urandom" -- anything else is an error. 527// 528// _LIBCPP_USING_GETENTROPY 529// Use getentropy(). 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_FUCHSIA_CPRNG 534// Use Fuchsia's zx_cprng_draw() system call, which is specified to 535// deliver high-quality entropy and cannot fail. 536// When this option is used, the token passed to `std::random_device`'s 537// constructor *must* be "/dev/urandom" -- anything else is an error. 538// 539// _LIBCPP_USING_NACL_RANDOM 540// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 541// including accesses to the special files under `/dev`. This implementation 542// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 543// When this option is used, the token passed to `std::random_device`'s 544// constructor *must* be "/dev/urandom" -- anything else is an error. 545// 546// _LIBCPP_USING_WIN32_RANDOM 547// Use rand_s(), for use on Windows. 548// When this option is used, the token passed to `std::random_device`'s 549// constructor *must* be "/dev/urandom" -- anything else is an error. 550# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 551 defined(__DragonFly__) 552# define _LIBCPP_USING_ARC4_RANDOM 553# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 554# define _LIBCPP_USING_GETENTROPY 555# elif defined(__Fuchsia__) 556# define _LIBCPP_USING_FUCHSIA_CPRNG 557# elif defined(__native_client__) 558# define _LIBCPP_USING_NACL_RANDOM 559# elif defined(_LIBCPP_WIN32API) 560# define _LIBCPP_USING_WIN32_RANDOM 561# else 562# define _LIBCPP_USING_DEV_RANDOM 563# endif 564 565# ifndef _LIBCPP_CXX03_LANG 566 567# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 568# define _ALIGNAS_TYPE(x) alignas(x) 569# define _ALIGNAS(x) alignas(x) 570# define _LIBCPP_NORETURN [[noreturn]] 571# define _NOEXCEPT noexcept 572# define _NOEXCEPT_(x) noexcept(x) 573# define _LIBCPP_CONSTEXPR constexpr 574 575# else 576 577# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 578# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 579# define _ALIGNAS(x) __attribute__((__aligned__(x))) 580# define _LIBCPP_NORETURN __attribute__((__noreturn__)) 581# define _LIBCPP_HAS_NO_NOEXCEPT 582# define nullptr __nullptr 583# define _NOEXCEPT throw() 584# define _NOEXCEPT_(x) 585# define static_assert(...) _Static_assert(__VA_ARGS__) 586# define decltype(...) __decltype(__VA_ARGS__) 587# define _LIBCPP_CONSTEXPR 588 589typedef __char16_t char16_t; 590typedef __char32_t char32_t; 591 592# endif 593 594# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L 595# define _LIBCPP_HAS_NO_EXCEPTIONS 596# endif 597 598# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 599 600# if defined(_LIBCPP_COMPILER_CLANG_BASED) 601 602# if defined(__APPLE__) 603# if defined(__i386__) || defined(__x86_64__) 604// use old string layout on x86_64 and i386 605# elif defined(__arm__) 606// use old string layout on arm (which does not include aarch64/arm64), except on watch ABIs 607# if defined(__ARM_ARCH_7K__) && __ARM_ARCH_7K__ >= 2 608# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 609# endif 610# else 611# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 612# endif 613# endif 614 615// Objective-C++ features (opt-in) 616# if __has_feature(objc_arc) 617# define _LIBCPP_HAS_OBJC_ARC 618# endif 619 620# if __has_feature(objc_arc_weak) 621# define _LIBCPP_HAS_OBJC_ARC_WEAK 622# endif 623 624# if __has_extension(blocks) 625# define _LIBCPP_HAS_EXTENSION_BLOCKS 626# endif 627 628# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 629# define _LIBCPP_HAS_BLOCKS_RUNTIME 630# endif 631 632# if !__has_feature(address_sanitizer) 633# define _LIBCPP_HAS_NO_ASAN 634# endif 635 636# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 637 638# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 639 640# elif defined(_LIBCPP_COMPILER_GCC) 641 642# if !defined(__SANITIZE_ADDRESS__) 643# define _LIBCPP_HAS_NO_ASAN 644# endif 645 646# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 647 648# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 649 650# endif // _LIBCPP_COMPILER_[CLANG|GCC] 651 652# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 653 654# ifdef _DLL 655# define _LIBCPP_CRT_FUNC __declspec(dllimport) 656# else 657# define _LIBCPP_CRT_FUNC 658# endif 659 660# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 661# define _LIBCPP_DLL_VIS 662# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 663# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 664# define _LIBCPP_OVERRIDABLE_FUNC_VIS 665# define _LIBCPP_EXPORTED_FROM_ABI 666# elif defined(_LIBCPP_BUILDING_LIBRARY) 667# define _LIBCPP_DLL_VIS __declspec(dllexport) 668# if defined(__MINGW32__) 669# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 670# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 671# else 672# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 673# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 674# endif 675# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 676# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 677# else 678# define _LIBCPP_DLL_VIS __declspec(dllimport) 679# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 680# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 681# define _LIBCPP_OVERRIDABLE_FUNC_VIS 682# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 683# endif 684 685# define _LIBCPP_HIDDEN 686# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 687# define _LIBCPP_TEMPLATE_VIS 688# define _LIBCPP_TEMPLATE_DATA_VIS 689# define _LIBCPP_TYPE_VISIBILITY_DEFAULT 690 691# else 692 693# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 694# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) 695# else 696# define _LIBCPP_VISIBILITY(vis) 697# endif 698 699# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") 700# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") 701# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") 702# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") 703# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 704 705// TODO: Make this a proper customization point or remove the option to override it. 706# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 707# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") 708# endif 709 710# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 711// The inline should be removed once PR32114 is resolved 712# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 713# else 714# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 715# endif 716 717// GCC doesn't support the type_visibility attribute, so we have to keep the visibility attribute on templates 718# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && !__has_attribute(__type_visibility__) 719# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 720# else 721# define _LIBCPP_TEMPLATE_VIS 722# endif 723 724# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 725# define _LIBCPP_TYPE_VISIBILITY_DEFAULT __attribute__((__type_visibility__("default"))) 726# else 727# define _LIBCPP_TYPE_VISIBILITY_DEFAULT 728# endif 729 730# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 731 732# if __has_attribute(exclude_from_explicit_instantiation) 733# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 734# else 735// Try to approximate the effect of exclude_from_explicit_instantiation 736// (which is that entities are not assumed to be provided by explicit 737// template instantiations in the dylib) by always inlining those entities. 738# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 739# endif 740 741# if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 742# define _LIBCPP_HARDENING_SIG f 743# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE 744# define _LIBCPP_HARDENING_SIG s 745# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG 746# define _LIBCPP_HARDENING_SIG d 747# else 748# define _LIBCPP_HARDENING_SIG n // "none" 749# endif 750 751# ifdef _LIBCPP_HAS_NO_EXCEPTIONS 752# define _LIBCPP_EXCEPTIONS_SIG n 753# else 754# define _LIBCPP_EXCEPTIONS_SIG e 755# endif 756 757# define _LIBCPP_ODR_SIGNATURE \ 758 _LIBCPP_CONCAT(_LIBCPP_CONCAT(_LIBCPP_HARDENING_SIG, _LIBCPP_EXCEPTIONS_SIG), _LIBCPP_VERSION) 759 760// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved 761// on two levels: 762// 1. The symbol is given hidden visibility, which ensures that users won't start exporting 763// symbols from their dynamic library by means of using the libc++ headers. This ensures 764// that those symbols stay private to the dynamic library in which it is defined. 765// 766// 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library. 767// This ensures that no ODR violation can arise from mixing two TUs compiled with different 768// versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the 769// program contains two definitions of a function, the ODR requires them to be token-by-token 770// equivalent, and the linker is allowed to pick either definition and discard the other one. 771// 772// For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled 773// *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs 774// compiled with different settings), the two definitions are both visible by the linker and they 775// have the same name, but they have a meaningfully different implementation (one throws an exception 776// and the other aborts the program). This violates the ODR and makes the program ill-formed, and in 777// practice what will happen is that the linker will pick one of the definitions at random and will 778// discard the other one. This can quite clearly lead to incorrect program behavior. 779// 780// A similar reasoning holds for many other properties that are ODR-affecting. Essentially any 781// property that causes the code of a function to differ from the code in another configuration 782// can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI 783// tag, but we encode the ones that we think are most important: library version, exceptions, and 784// hardening mode. 785// 786// Note that historically, solving this problem has been achieved in various ways, including 787// force-inlining all functions or giving internal linkage to all functions. Both these previous 788// solutions suffer from drawbacks that lead notably to code bloat. 789// 790// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend 791// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. 792// 793// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions 794// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled 795// name of a virtual function is part of its ABI, since some architectures like arm64e can sign 796// the virtual function pointer in the vtable based on the mangled name of the function. Since 797// we use an ABI tag that changes with each released version, the mangled name of the virtual 798// function would change, which is incorrect. Note that it doesn't make much sense to change 799// the implementation of a virtual function in an ABI-incompatible way in the first place, 800// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable. 801// 802// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing 803// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and 804// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. 805# ifndef _LIBCPP_NO_ABI_TAG 806# define _LIBCPP_HIDE_FROM_ABI \ 807 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ 808 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_ODR_SIGNATURE)))) 809# else 810# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 811# endif 812# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 813 814// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern 815// "C" function, as those lack mangling. 816# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 817 818# ifdef _LIBCPP_BUILDING_LIBRARY 819# if _LIBCPP_ABI_VERSION > 1 820# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 821# else 822# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 823# endif 824# else 825# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 826# endif 827 828// TODO(LLVM-19): Remove _LIBCPP_INLINE_VISIBILITY and _VSTD, which we're keeping around 829// only to ease the renaming for downstreams. 830# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 831# define _VSTD std 832 833// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 834// clang-format off 835# define _LIBCPP_BEGIN_NAMESPACE_STD namespace _LIBCPP_TYPE_VISIBILITY_DEFAULT std { \ 836 inline namespace _LIBCPP_ABI_NAMESPACE { 837# define _LIBCPP_END_NAMESPACE_STD }} 838 839# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD \ 840 inline namespace __fs { namespace filesystem { 841 842# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} 843// clang-format on 844 845# if __has_attribute(__enable_if__) 846# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 847# endif 848 849# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER) 850# define _LIBCPP_HAS_NO_INT128 851# endif 852 853# ifdef _LIBCPP_CXX03_LANG 854# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 855 struct _LIBCPP_EXPORTED_FROM_ABI x { \ 856 enum __lx 857// clang-format off 858# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 859 __lx __v_; \ 860 _LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \ 861 _LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 862 _LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \ 863 }; 864// clang-format on 865 866# else // _LIBCPP_CXX03_LANG 867# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x 868# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 869# endif // _LIBCPP_CXX03_LANG 870 871# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__NetBSD__) 872# define _LIBCPP_LOCALE__L_EXTENSIONS 1 873# endif 874 875# ifdef __FreeBSD__ 876# define _DECLARE_C99_LDBL_MATH 1 877# endif 878 879// If we are getting operator new from the MSVC CRT, then allocation overloads 880// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 881# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 882# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 883# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 884// We're deferring to Microsoft's STL to provide aligned new et al. We don't 885// have it unless the language feature test macro is defined. 886# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 887# elif defined(__MVS__) 888# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 889# endif 890 891# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 892# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 893# endif 894 895// It is not yet possible to use aligned_alloc() on all Apple platforms since 896// 10.15 was the first version to ship an implementation of aligned_alloc(). 897# if defined(__APPLE__) 898# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ 899 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) 900# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 901# endif 902# elif defined(__ANDROID__) && __ANDROID_API__ < 28 903// Android only provides aligned_alloc when targeting API 28 or higher. 904# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 905# endif 906 907# if defined(__APPLE__) || defined(__FreeBSD__) 908# define _LIBCPP_HAS_DEFAULTRUNELOCALE 909# endif 910 911# if defined(__APPLE__) || defined(__FreeBSD__) 912# define _LIBCPP_WCTYPE_IS_MASK 913# endif 914 915# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 916# define _LIBCPP_HAS_NO_CHAR8_T 917# endif 918 919// Deprecation macros. 920// 921// Deprecations warnings are always enabled, except when users explicitly opt-out 922// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 923# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 924# if __has_attribute(__deprecated__) 925# define _LIBCPP_DEPRECATED __attribute__((__deprecated__)) 926# define _LIBCPP_DEPRECATED_(m) __attribute__((__deprecated__(m))) 927# elif _LIBCPP_STD_VER >= 14 928# define _LIBCPP_DEPRECATED [[deprecated]] 929# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] 930# else 931# define _LIBCPP_DEPRECATED 932# define _LIBCPP_DEPRECATED_(m) 933# endif 934# else 935# define _LIBCPP_DEPRECATED 936# define _LIBCPP_DEPRECATED_(m) 937# endif 938 939# if !defined(_LIBCPP_CXX03_LANG) 940# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 941# else 942# define _LIBCPP_DEPRECATED_IN_CXX11 943# endif 944 945# if _LIBCPP_STD_VER >= 14 946# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 947# else 948# define _LIBCPP_DEPRECATED_IN_CXX14 949# endif 950 951# if _LIBCPP_STD_VER >= 17 952# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 953# else 954# define _LIBCPP_DEPRECATED_IN_CXX17 955# endif 956 957# if _LIBCPP_STD_VER >= 20 958# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 959# else 960# define _LIBCPP_DEPRECATED_IN_CXX20 961# endif 962 963# if _LIBCPP_STD_VER >= 23 964# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED 965# else 966# define _LIBCPP_DEPRECATED_IN_CXX23 967# endif 968 969# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 970# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 971# else 972# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 973# endif 974 975// Macros to enter and leave a state where deprecation warnings are suppressed. 976# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 977# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 978 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 979 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 980# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 981# else 982# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 983# define _LIBCPP_SUPPRESS_DEPRECATED_POP 984# endif 985 986# if _LIBCPP_STD_VER <= 11 987# define _LIBCPP_EXPLICIT_SINCE_CXX14 988# else 989# define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit 990# endif 991 992# if _LIBCPP_STD_VER >= 23 993# define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit 994# else 995# define _LIBCPP_EXPLICIT_SINCE_CXX23 996# endif 997 998# if _LIBCPP_STD_VER >= 14 999# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr 1000# else 1001# define _LIBCPP_CONSTEXPR_SINCE_CXX14 1002# endif 1003 1004# if _LIBCPP_STD_VER >= 17 1005# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr 1006# else 1007# define _LIBCPP_CONSTEXPR_SINCE_CXX17 1008# endif 1009 1010# if _LIBCPP_STD_VER >= 20 1011# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr 1012# else 1013# define _LIBCPP_CONSTEXPR_SINCE_CXX20 1014# endif 1015 1016# if _LIBCPP_STD_VER >= 23 1017# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr 1018# else 1019# define _LIBCPP_CONSTEXPR_SINCE_CXX23 1020# endif 1021 1022# ifndef _LIBCPP_HAS_NO_ASAN 1023extern "C" _LIBCPP_EXPORTED_FROM_ABI void 1024__sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); 1025extern "C" _LIBCPP_EXPORTED_FROM_ABI void __sanitizer_annotate_double_ended_contiguous_container( 1026 const void*, const void*, const void*, const void*, const void*, const void*); 1027extern "C" _LIBCPP_EXPORTED_FROM_ABI int 1028__sanitizer_verify_double_ended_contiguous_container(const void*, const void*, const void*, const void*); 1029# endif 1030 1031// Try to find out if RTTI is disabled. 1032# if !defined(__cpp_rtti) || __cpp_rtti < 199711L 1033# define _LIBCPP_HAS_NO_RTTI 1034# endif 1035 1036# ifndef _LIBCPP_WEAK 1037# define _LIBCPP_WEAK __attribute__((__weak__)) 1038# endif 1039 1040// Thread API 1041// clang-format off 1042# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1043 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1044 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1045 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1046 1047# if defined(__FreeBSD__) || \ 1048 defined(__wasi__) || \ 1049 defined(__NetBSD__) || \ 1050 defined(__OpenBSD__) || \ 1051 defined(__NuttX__) || \ 1052 defined(__linux__) || \ 1053 defined(__GNU__) || \ 1054 defined(__APPLE__) || \ 1055 defined(__MVS__) || \ 1056 defined(_AIX) || \ 1057 defined(__EMSCRIPTEN__) 1058// clang-format on 1059# define _LIBCPP_HAS_THREAD_API_PTHREAD 1060# elif defined(__Fuchsia__) 1061// TODO(44575): Switch to C11 thread API when possible. 1062# define _LIBCPP_HAS_THREAD_API_PTHREAD 1063# elif defined(_LIBCPP_WIN32API) 1064# define _LIBCPP_HAS_THREAD_API_WIN32 1065# else 1066# error "No thread API" 1067# endif // _LIBCPP_HAS_THREAD_API 1068# endif // _LIBCPP_HAS_NO_THREADS 1069 1070# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1071# if defined(__ANDROID__) && __ANDROID_API__ >= 30 1072# define _LIBCPP_HAS_COND_CLOCKWAIT 1073# elif defined(_LIBCPP_GLIBC_PREREQ) 1074# if _LIBCPP_GLIBC_PREREQ(2, 30) 1075# define _LIBCPP_HAS_COND_CLOCKWAIT 1076# endif 1077# endif 1078# endif 1079 1080# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1081# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1082 _LIBCPP_HAS_NO_THREADS is not defined. 1083# endif 1084 1085# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1086# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1087 _LIBCPP_HAS_NO_THREADS is defined. 1088# endif 1089 1090# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1091# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1092 _LIBCPP_HAS_NO_THREADS is defined. 1093# endif 1094 1095# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1096# define __STDCPP_THREADS__ 1 1097# endif 1098 1099// The glibc and Bionic implementation of pthreads implements 1100// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1101// mutexes have no destroy mechanism. 1102// 1103// This optimization can't be performed on Apple platforms, where 1104// pthread_mutex_destroy can allow the kernel to release resources. 1105// See https://llvm.org/D64298 for details. 1106// 1107// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1108// respective stakeholders. 1109// clang-format off 1110# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 1111 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1112 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1113// clang-format on 1114# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1115# endif 1116 1117// Destroying a condvar is a nop on Windows. 1118// 1119// This optimization can't be performed on Apple platforms, where 1120// pthread_cond_destroy can allow the kernel to release resources. 1121// See https://llvm.org/D64298 for details. 1122// 1123// TODO(EricWF): This is potentially true for some pthread implementations 1124// as well. 1125# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1126# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1127# endif 1128 1129// Some systems do not provide gets() in their C library, for security reasons. 1130# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) 1131# define _LIBCPP_C_HAS_NO_GETS 1132# endif 1133 1134# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 1135 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1136# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1137# endif 1138 1139# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1140# define _LIBCPP_HAS_C_ATOMIC_IMP 1141# elif defined(_LIBCPP_COMPILER_GCC) 1142# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1143# endif 1144 1145# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1146 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1147# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1148# else 1149# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1150# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1151# endif 1152# ifdef _LIBCPP_FREESTANDING 1153# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1154# endif 1155# endif 1156 1157# if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(__no_thread_safety_analysis__) 1158# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((__no_thread_safety_analysis__)) 1159# else 1160# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS 1161# endif 1162 1163# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1164# if defined(__clang__) && __has_attribute(acquire_capability) 1165// Work around the attribute handling in clang. When both __declspec and 1166// __attribute__ are present, the processing goes awry preventing the definition 1167// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1168// combining the two does work. 1169# if !defined(_MSC_VER) 1170# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1171# endif 1172# endif 1173# endif 1174 1175# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1176# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1177# else 1178# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1179# endif 1180 1181# if _LIBCPP_STD_VER >= 20 1182# define _LIBCPP_CONSTINIT constinit 1183# elif __has_attribute(__require_constant_initialization__) 1184# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1185# else 1186# define _LIBCPP_CONSTINIT 1187# endif 1188 1189# if __has_attribute(__noinline__) 1190# define _LIBCPP_NOINLINE __attribute__((__noinline__)) 1191# else 1192# define _LIBCPP_NOINLINE 1193# endif 1194 1195// We often repeat things just for handling wide characters in the library. 1196// When wide characters are disabled, it can be useful to have a quick way of 1197// disabling it without having to resort to #if-#endif, which has a larger 1198// impact on readability. 1199# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1200# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1201# else 1202# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1203# endif 1204 1205# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1206# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1207# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1208# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1209# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1210# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1211# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1212 1213# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1214# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1215# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION 1216# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1217# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1218# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1219# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1220# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1221 1222// clang-format off 1223# 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()\")") 1224# 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()\")") 1225// clang-format on 1226 1227# ifndef _LIBCPP_NO_AUTO_LINK 1228# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1229# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1230# pragma comment(lib, "c++.lib") 1231# else 1232# pragma comment(lib, "libc++.lib") 1233# endif 1234# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1235# endif // _LIBCPP_NO_AUTO_LINK 1236 1237// Configures the fopen close-on-exec mode character, if any. This string will 1238// be appended to any mode string used by fstream for fopen/fdopen. 1239// 1240// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1241// do. 1242# if defined(__BIONIC__) 1243# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1244# else 1245# define _LIBCPP_FOPEN_CLOEXEC_MODE 1246# endif 1247 1248# if __has_cpp_attribute(msvc::no_unique_address) 1249// MSVC implements [[no_unique_address]] as a silent no-op currently. 1250// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1251// However, MSVC implements [[msvc::no_unique_address]] which does what 1252// [[no_unique_address]] is supposed to do, in general. 1253 1254// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1255// [[msvc::no_unique_address]] though. If/when it does implement 1256// [[msvc::no_unique_address]], this should be preferred though. 1257# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1258# elif __has_cpp_attribute(no_unique_address) 1259# define _LIBCPP_NO_UNIQUE_ADDRESS [[__no_unique_address__]] 1260# else 1261# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1262// Note that this can be replaced by #error as soon as clang-cl 1263// implements msvc::no_unique_address, since there should be no C++20 1264// compiler that doesn't support one of the two attributes at that point. 1265// We generally don't want to use this macro outside of C++20-only code, 1266// because using it conditionally in one language version only would make 1267// the ABI inconsistent. 1268# endif 1269 1270# ifdef _LIBCPP_COMPILER_CLANG_BASED 1271# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1272# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1273# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1274# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1275# elif defined(_LIBCPP_COMPILER_GCC) 1276# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1277# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1278# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1279# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1280# else 1281# define _LIBCPP_DIAGNOSTIC_PUSH 1282# define _LIBCPP_DIAGNOSTIC_POP 1283# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1284# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1285# endif 1286 1287// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these 1288// functions is gradually being added to existing C libraries. The conditions 1289// below check for known C library versions and conditions under which these 1290// functions are declared by the C library. 1291# define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1292// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if 1293// __cpp_char8_t is defined or if C2X extensions are enabled. Determining 1294// the latter depends on internal GNU libc details that are not appropriate 1295// to depend on here, so any declarations present when __cpp_char8_t is not 1296// defined are ignored. 1297# if defined(_LIBCPP_GLIBC_PREREQ) 1298# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) 1299# undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1300# endif 1301# endif 1302 1303// There are a handful of public standard library types that are intended to 1304// support CTAD but don't need any explicit deduction guides to do so. This 1305// macro is used to mark them as such, which suppresses the 1306// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code 1307// with these classes. 1308# if _LIBCPP_STD_VER >= 17 1309# ifdef _LIBCPP_COMPILER_CLANG_BASED 1310# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \ 1311 template <class... _Tag> \ 1312 [[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...> 1313# else 1314# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \ 1315 template <class... _Tag> \ 1316 ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...> 1317# endif 1318# else 1319# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "") 1320# endif 1321 1322// TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use 1323// compiler intrinsics in the Objective-C++ mode. 1324# ifdef __OBJC__ 1325# define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS 1326# endif 1327 1328# define _PSTL_PRAGMA(x) _Pragma(#x) 1329 1330// Enable SIMD for compilers that support OpenMP 4.0 1331# if (defined(_OPENMP) && _OPENMP >= 201307) 1332 1333# define _PSTL_UDR_PRESENT 1334# define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd) 1335# define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd) 1336# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM)) 1337# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM)) 1338# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM)) 1339# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM)) 1340 1341// Declaration of reduction functor, where 1342// NAME - the name of the functor 1343// OP - type of the callable object with the reduction operation 1344// omp_in - refers to the local partial result 1345// omp_out - refers to the final value of the combiner operator 1346// omp_priv - refers to the private copy of the initial value 1347// omp_orig - refers to the original variable to be reduced 1348# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \ 1349 _PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig)) 1350 1351# elif defined(_LIBCPP_COMPILER_CLANG_BASED) 1352 1353# define _PSTL_PRAGMA_SIMD _Pragma("clang loop vectorize(enable) interleave(enable)") 1354# define _PSTL_PRAGMA_DECLARE_SIMD 1355# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") 1356# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") 1357# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1358# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1359# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1360 1361# else // (defined(_OPENMP) && _OPENMP >= 201307) 1362 1363# define _PSTL_PRAGMA_SIMD 1364# define _PSTL_PRAGMA_DECLARE_SIMD 1365# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) 1366# define _PSTL_PRAGMA_SIMD_SCAN(PRM) 1367# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1368# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1369# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1370 1371# endif // (defined(_OPENMP) && _OPENMP >= 201307) 1372 1373# define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED 1374 1375// Optional attributes - these are useful for a better QoI, but not required to be available 1376 1377# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 1378# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 1379# else 1380# define _LIBCPP_NO_CFI 1381# endif 1382 1383# if __has_attribute(__malloc__) 1384# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 1385# else 1386# define _LIBCPP_NOALIAS 1387# endif 1388 1389# if __has_attribute(__using_if_exists__) 1390# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__)) 1391# else 1392# define _LIBCPP_USING_IF_EXISTS 1393# endif 1394 1395# if __has_cpp_attribute(nodiscard) 1396# define _LIBCPP_NODISCARD [[__nodiscard__]] 1397# else 1398// We can't use GCC's [[gnu::warn_unused_result]] and 1399// __attribute__((warn_unused_result)), because GCC does not silence them via 1400// (void) cast. 1401# define _LIBCPP_NODISCARD 1402# endif 1403 1404// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1405// specified as such as an extension. 1406# if !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1407# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1408# else 1409# define _LIBCPP_NODISCARD_EXT 1410# endif 1411 1412# if _LIBCPP_STD_VER >= 20 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1413# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1414# else 1415# define _LIBCPP_NODISCARD_AFTER_CXX17 1416# endif 1417 1418# if __has_attribute(__no_destroy__) 1419# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1420# else 1421# define _LIBCPP_NO_DESTROY 1422# endif 1423 1424# if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1425# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning"))) 1426# else 1427# define _LIBCPP_DIAGNOSE_WARNING(...) 1428# endif 1429 1430// Use a function like macro to imply that it must be followed by a semicolon 1431# if __has_cpp_attribute(fallthrough) 1432# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1433# elif __has_attribute(__fallthrough__) 1434# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1435# else 1436# define _LIBCPP_FALLTHROUGH() ((void)0) 1437# endif 1438 1439# if __has_cpp_attribute(_Clang::__lifetimebound__) 1440# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]] 1441# else 1442# define _LIBCPP_LIFETIMEBOUND 1443# endif 1444 1445# if __has_attribute(__nodebug__) 1446# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1447# else 1448# define _LIBCPP_NODEBUG 1449# endif 1450 1451# if __has_attribute(__standalone_debug__) 1452# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1453# else 1454# define _LIBCPP_STANDALONE_DEBUG 1455# endif 1456 1457# if __has_attribute(__preferred_name__) 1458# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1459# else 1460# define _LIBCPP_PREFERRED_NAME(x) 1461# endif 1462 1463# if __has_attribute(__no_sanitize__) 1464# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__))) 1465# else 1466# define _LIBCPP_NO_SANITIZE(...) 1467# endif 1468 1469# if __has_attribute(__init_priority__) 1470# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100))) 1471# else 1472# define _LIBCPP_INIT_PRIORITY_MAX 1473# endif 1474 1475# if __has_attribute(__format__) 1476// The attribute uses 1-based indices for ordinary and static member functions. 1477// The attribute uses 2-based indices for non-static member functions. 1478# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1479 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1480# else 1481# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1482# endif 1483 1484# if __has_attribute(__packed__) 1485# define _LIBCPP_PACKED __attribute__((__packed__)) 1486# else 1487# define _LIBCPP_PACKED 1488# endif 1489 1490# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases) 1491# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1492# else 1493# define _LIBCPP_DECLSPEC_EMPTY_BASES 1494# endif 1495 1496// Allow for build-time disabling of unsigned integer sanitization 1497# if __has_attribute(no_sanitize) && !defined(_LIBCPP_COMPILER_GCC) 1498# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 1499# else 1500# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1501# endif 1502 1503#endif // __cplusplus 1504 1505#endif // _LIBCPP___CONFIG 1506