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# define _LIBCPP_COMPILER_CLANG_BASED 27# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 28#elif defined(__clang__) 29# define _LIBCPP_COMPILER_CLANG_BASED 30# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 31#elif defined(__GNUC__) 32# define _LIBCPP_COMPILER_GCC 33#elif defined(_MSC_VER) 34# define _LIBCPP_COMPILER_MSVC 35#endif 36 37#ifdef __cplusplus 38 39# define _LIBCPP_VERSION 15007 40 41# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y 42# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) 43 44// Valid C++ identifier that revs with every libc++ version. This can be used to 45// generate identifiers that must be unique for every released libc++ version. 46# define _LIBCPP_VERSIONED_IDENTIFIER _LIBCPP_CONCAT(v, _LIBCPP_VERSION) 47 48# if __STDC_HOSTED__ == 0 49# define _LIBCPP_FREESTANDING 50# endif 51 52# ifndef _LIBCPP_STD_VER 53# if __cplusplus <= 201103L 54# define _LIBCPP_STD_VER 11 55# elif __cplusplus <= 201402L 56# define _LIBCPP_STD_VER 14 57# elif __cplusplus <= 201703L 58# define _LIBCPP_STD_VER 17 59# elif __cplusplus <= 202002L 60# define _LIBCPP_STD_VER 20 61# else 62# define _LIBCPP_STD_VER 22 // current year, or date of c++2b ratification 63# endif 64# endif // _LIBCPP_STD_VER 65 66# if defined(__ELF__) 67# define _LIBCPP_OBJECT_FORMAT_ELF 1 68# elif defined(__MACH__) 69# define _LIBCPP_OBJECT_FORMAT_MACHO 1 70# elif defined(_WIN32) 71# define _LIBCPP_OBJECT_FORMAT_COFF 1 72# elif defined(__wasm__) 73# define _LIBCPP_OBJECT_FORMAT_WASM 1 74# elif defined(_AIX) 75# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 76# else 77// ... add new file formats here ... 78# endif 79 80# if _LIBCPP_ABI_VERSION >= 2 81// Change short string representation so that string data starts at offset 0, 82// improving its alignment in some cases. 83# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 84// Fix deque iterator type in order to support incomplete types. 85# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 86// Fix undefined behavior in how std::list stores its linked nodes. 87# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 88// Fix undefined behavior in how __tree stores its end and parent nodes. 89# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 90// Fix undefined behavior in how __hash_table stores its pointer types. 91# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 92# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 93# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 94// Define a key function for `bad_function_call` in the library, to centralize 95// its vtable and typeinfo to libc++ rather than having all other libraries 96// using that class define their own copies. 97# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 98// Override the default return value of exception::what() for 99// bad_function_call::what() with a string that is specific to 100// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 101// because it changes the vtable layout of bad_function_call. 102# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 103// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 104# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 105// Give reverse_iterator<T> one data member of type T, not two. 106// Also, in C++17 and later, don't derive iterator types from std::iterator. 107# define _LIBCPP_ABI_NO_ITERATOR_BASES 108// Use the smallest possible integer type to represent the index of the variant. 109// Previously libc++ used "unsigned int" exclusively. 110# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 111// Unstable attempt to provide a more optimized std::function 112# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 113// All the regex constants must be distinct and nonzero. 114# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 115// Re-worked external template instantiations for std::string with a focus on 116// performance and fast-path inlining. 117# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 118// Enable clang::trivial_abi on std::unique_ptr. 119# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 120// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 121# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 122// std::random_device holds some state when it uses an implementation that gets 123// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 124// implementation to another one on a platform that has already shipped 125// std::random_device, one needs to retain the same object layout to remain ABI 126// compatible. This switch removes these workarounds for platforms that don't care 127// about ABI compatibility. 128# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 129// Don't export the legacy __basic_string_common class and its methods from the built library. 130# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 131// Don't export the legacy __vector_base_common class and its methods from the built library. 132# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 133// According to the Standard, `bitset::operator[] const` returns bool 134# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 135// Remove the base 10 implementation of std::to_chars from the dylib. 136// The implementation moved to the header, but we still export the symbols from 137// the dylib for backwards compatibility. 138# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 139# elif _LIBCPP_ABI_VERSION == 1 140# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 141// Enable compiling copies of now inline methods into the dylib to support 142// applications compiled against older libraries. This is unnecessary with 143// COFF dllexport semantics, since dllexport forces a non-inline definition 144// of inline functions to be emitted anyway. Our own non-inline copy would 145// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 146// the linker will take issue with the symbols in the shared object if the 147// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 148// so disable it. 149# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 150# endif 151// Feature macros for disabling pre ABI v1 features. All of these options 152// are deprecated. 153# if defined(__FreeBSD__) 154# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 155# endif 156# endif 157 158# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 159// Enable additional explicit instantiations of iostreams components. This 160// reduces the number of weak definitions generated in programs that use 161// iostreams by providing a single strong definition in the shared library. 162# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 163 164// Define a key function for `bad_function_call` in the library, to centralize 165// its vtable and typeinfo to libc++ rather than having all other libraries 166// using that class define their own copies. 167# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 168# endif 169 170# define _LIBCPP_TOSTRING2(x) # x 171# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 172 173# if __cplusplus < 201103L 174# define _LIBCPP_CXX03_LANG 175# endif 176 177# ifndef __has_attribute 178# define __has_attribute(__x) 0 179# endif 180 181# ifndef __has_builtin 182# define __has_builtin(__x) 0 183# endif 184 185# ifndef __has_extension 186# define __has_extension(__x) 0 187# endif 188 189# ifndef __has_feature 190# define __has_feature(__x) 0 191# endif 192 193# ifndef __has_cpp_attribute 194# define __has_cpp_attribute(__x) 0 195# endif 196 197// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 198// the compiler and '1' otherwise. 199# ifndef __is_identifier 200# define __is_identifier(__x) 1 201# endif 202 203# ifndef __has_declspec_attribute 204# define __has_declspec_attribute(__x) 0 205# endif 206 207# define __has_keyword(__x) !(__is_identifier(__x)) 208 209# ifndef __has_include 210# define __has_include(...) 0 211# endif 212 213# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L 214# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" 215# endif 216 217# ifdef _LIBCPP_COMPILER_MSVC 218# error If you successfully use libc++ with MSVC please tell the libc++ developers and consider upstreaming your \ 219changes. We are not aware of anybody using this configuration and know that at least some code is currently broken. \ 220If there are users of this configuration we are happy to provide support. 221# endif 222 223// FIXME: ABI detection should be done via compiler builtin macros. This 224// is just a placeholder until Clang implements such macros. For now assume 225// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 226// and allow the user to explicitly specify the ABI to handle cases where this 227// heuristic falls short. 228# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 229# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 230# elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 231# define _LIBCPP_ABI_ITANIUM 232# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 233# define _LIBCPP_ABI_MICROSOFT 234# else 235# if defined(_WIN32) && defined(_MSC_VER) 236# define _LIBCPP_ABI_MICROSOFT 237# else 238# define _LIBCPP_ABI_ITANIUM 239# endif 240# endif 241 242# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 243# define _LIBCPP_ABI_VCRUNTIME 244# endif 245 246# if __has_feature(experimental_library) 247# ifndef _LIBCPP_ENABLE_EXPERIMENTAL 248# define _LIBCPP_ENABLE_EXPERIMENTAL 249# endif 250# endif 251 252// Incomplete features get their own specific disabling flags. This makes it 253// easier to grep for target specific flags once the feature is complete. 254# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) 255# define _LIBCPP_HAS_NO_INCOMPLETE_FORMAT 256# define _LIBCPP_HAS_NO_INCOMPLETE_RANGES 257# endif 258 259// Need to detect which libc we're using if we're on Linux. 260# if defined(__linux__) 261# include <features.h> 262# if defined(__GLIBC_PREREQ) 263# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 264# else 265# define _LIBCPP_GLIBC_PREREQ(a, b) 0 266# endif // defined(__GLIBC_PREREQ) 267# endif // defined(__linux__) 268 269# if defined(__MVS__) 270# include <features.h> // for __NATIVE_ASCII_F 271# endif 272 273# ifdef __LITTLE_ENDIAN__ 274# if __LITTLE_ENDIAN__ 275# define _LIBCPP_LITTLE_ENDIAN 276# endif // __LITTLE_ENDIAN__ 277# endif // __LITTLE_ENDIAN__ 278 279# ifdef __BIG_ENDIAN__ 280# if __BIG_ENDIAN__ 281# define _LIBCPP_BIG_ENDIAN 282# endif // __BIG_ENDIAN__ 283# endif // __BIG_ENDIAN__ 284 285# ifdef __BYTE_ORDER__ 286# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 287# define _LIBCPP_LITTLE_ENDIAN 288# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 289# define _LIBCPP_BIG_ENDIAN 290# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 291# endif // __BYTE_ORDER__ 292 293# ifdef __FreeBSD__ 294# include <sys/endian.h> 295# include <osreldate.h> 296# if _BYTE_ORDER == _LITTLE_ENDIAN 297# define _LIBCPP_LITTLE_ENDIAN 298# else // _BYTE_ORDER == _LITTLE_ENDIAN 299# define _LIBCPP_BIG_ENDIAN 300# endif // _BYTE_ORDER == _LITTLE_ENDIAN 301# endif // __FreeBSD__ 302 303# if defined(__NetBSD__) || defined(__OpenBSD__) 304# include <sys/endian.h> 305# if _BYTE_ORDER == _LITTLE_ENDIAN 306# define _LIBCPP_LITTLE_ENDIAN 307# else // _BYTE_ORDER == _LITTLE_ENDIAN 308# define _LIBCPP_BIG_ENDIAN 309# endif // _BYTE_ORDER == _LITTLE_ENDIAN 310# endif // defined(__NetBSD__) || defined(__OpenBSD__) 311 312# if defined(_WIN32) 313# define _LIBCPP_WIN32API 314# define _LIBCPP_LITTLE_ENDIAN 315# define _LIBCPP_SHORT_WCHAR 1 316// Both MinGW and native MSVC provide a "MSVC"-like environment 317# define _LIBCPP_MSVCRT_LIKE 318// If mingw not explicitly detected, assume using MS C runtime only if 319// a MS compatibility version is specified. 320# if defined(_MSC_VER) && !defined(__MINGW32__) 321# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 322# endif 323# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 324# define _LIBCPP_HAS_BITSCAN64 325# endif 326# define _LIBCPP_HAS_OPEN_WITH_WCHAR 327# endif // defined(_WIN32) 328 329# ifdef __sun__ 330# include <sys/isa_defs.h> 331# ifdef _LITTLE_ENDIAN 332# define _LIBCPP_LITTLE_ENDIAN 333# else 334# define _LIBCPP_BIG_ENDIAN 335# endif 336# endif // __sun__ 337 338# if defined(_AIX) && !defined(__64BIT__) 339// The size of wchar is 2 byte on 32-bit mode on AIX. 340# define _LIBCPP_SHORT_WCHAR 1 341# endif 342 343// Libc++ supports various implementations of std::random_device. 344// 345// _LIBCPP_USING_DEV_RANDOM 346// Read entropy from the given file, by default `/dev/urandom`. 347// If a token is provided, it is assumed to be the path to a file 348// to read entropy from. This is the default behavior if nothing 349// else is specified. This implementation requires storing state 350// inside `std::random_device`. 351// 352// _LIBCPP_USING_ARC4_RANDOM 353// Use arc4random(). This allows obtaining random data even when 354// using sandboxing mechanisms. On some platforms like Apple, this 355// is the recommended source of entropy for user-space programs. 356// When this option is used, the token passed to `std::random_device`'s 357// constructor *must* be "/dev/urandom" -- anything else is an error. 358// 359// _LIBCPP_USING_GETENTROPY 360// Use getentropy(). 361// When this option is used, the token passed to `std::random_device`'s 362// constructor *must* be "/dev/urandom" -- anything else is an error. 363// 364// _LIBCPP_USING_FUCHSIA_CPRNG 365// Use Fuchsia's zx_cprng_draw() system call, which is specified to 366// deliver high-quality entropy and cannot fail. 367// When this option is used, the token passed to `std::random_device`'s 368// constructor *must* be "/dev/urandom" -- anything else is an error. 369// 370// _LIBCPP_USING_NACL_RANDOM 371// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 372// including accesses to the special files under `/dev`. This implementation 373// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 374// When this option is used, the token passed to `std::random_device`'s 375// constructor *must* be "/dev/urandom" -- anything else is an error. 376// 377// _LIBCPP_USING_WIN32_RANDOM 378// Use rand_s(), for use on Windows. 379// When this option is used, the token passed to `std::random_device`'s 380// constructor *must* be "/dev/urandom" -- anything else is an error. 381# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 382 defined(__DragonFly__) || defined(__sun__) 383# define _LIBCPP_USING_ARC4_RANDOM 384# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 385# define _LIBCPP_USING_GETENTROPY 386# elif defined(__Fuchsia__) 387# define _LIBCPP_USING_FUCHSIA_CPRNG 388# elif defined(__native_client__) 389# define _LIBCPP_USING_NACL_RANDOM 390# elif defined(_LIBCPP_WIN32API) 391# define _LIBCPP_USING_WIN32_RANDOM 392# else 393# define _LIBCPP_USING_DEV_RANDOM 394# endif 395 396# if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 397# include <endian.h> 398# if __BYTE_ORDER == __LITTLE_ENDIAN 399# define _LIBCPP_LITTLE_ENDIAN 400# elif __BYTE_ORDER == __BIG_ENDIAN 401# define _LIBCPP_BIG_ENDIAN 402# else // __BYTE_ORDER == __BIG_ENDIAN 403# error unable to determine endian 404# endif 405# endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 406 407# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 408# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 409# else 410# define _LIBCPP_NO_CFI 411# endif 412 413# ifndef _LIBCPP_CXX03_LANG 414 415# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 416# define _ALIGNAS_TYPE(x) alignas(x) 417# define _ALIGNAS(x) alignas(x) 418# define _LIBCPP_NORETURN [[noreturn]] 419# define _NOEXCEPT noexcept 420# define _NOEXCEPT_(x) noexcept(x) 421 422# else 423 424# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 425# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 426# define _ALIGNAS(x) __attribute__((__aligned__(x))) 427# define _LIBCPP_NORETURN __attribute__((noreturn)) 428# define _LIBCPP_HAS_NO_NOEXCEPT 429# define nullptr __nullptr 430# define _NOEXCEPT throw() 431# define _NOEXCEPT_(x) 432 433typedef __char16_t char16_t; 434typedef __char32_t char32_t; 435 436# endif 437 438# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L 439# define _LIBCPP_NO_EXCEPTIONS 440# endif 441 442# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 443 444# if defined(_LIBCPP_COMPILER_CLANG_BASED) 445 446# if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 447# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 448# endif 449 450// Objective-C++ features (opt-in) 451# if __has_feature(objc_arc) 452# define _LIBCPP_HAS_OBJC_ARC 453# endif 454 455# if __has_feature(objc_arc_weak) 456# define _LIBCPP_HAS_OBJC_ARC_WEAK 457# endif 458 459# if __has_extension(blocks) 460# define _LIBCPP_HAS_EXTENSION_BLOCKS 461# endif 462 463# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 464# define _LIBCPP_HAS_BLOCKS_RUNTIME 465# endif 466 467# if !__has_feature(address_sanitizer) 468# define _LIBCPP_HAS_NO_ASAN 469# endif 470 471// Allow for build-time disabling of unsigned integer sanitization 472# if __has_attribute(no_sanitize) 473# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 474# endif 475 476# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 477 478# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 479 480# elif defined(_LIBCPP_COMPILER_GCC) 481 482# if !defined(__SANITIZE_ADDRESS__) 483# define _LIBCPP_HAS_NO_ASAN 484# endif 485 486# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 487 488# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 489 490# elif defined(_LIBCPP_COMPILER_MSVC) 491 492# define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 493 494# if _MSC_VER < 1900 495# error "MSVC versions prior to Visual Studio 2015 are not supported" 496# endif 497 498# define _LIBCPP_NORETURN __declspec(noreturn) 499 500# define _LIBCPP_WEAK 501 502# define _LIBCPP_HAS_NO_ASAN 503 504# define _LIBCPP_ALWAYS_INLINE __forceinline 505 506# define _LIBCPP_HAS_NO_VECTOR_EXTENSION 507 508# define _LIBCPP_DISABLE_EXTENSION_WARNING 509 510# endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC] 511 512# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 513 514# ifdef _DLL 515# define _LIBCPP_CRT_FUNC __declspec(dllimport) 516# else 517# define _LIBCPP_CRT_FUNC 518# endif 519 520# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 521# define _LIBCPP_DLL_VIS 522# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 523# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 524# define _LIBCPP_OVERRIDABLE_FUNC_VIS 525# define _LIBCPP_EXPORTED_FROM_ABI 526# elif defined(_LIBCPP_BUILDING_LIBRARY) 527# define _LIBCPP_DLL_VIS __declspec(dllexport) 528# if defined(__MINGW32__) 529# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 530# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 531# else 532# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 533# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 534# endif 535# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 536# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 537# else 538# define _LIBCPP_DLL_VIS __declspec(dllimport) 539# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 540# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 541# define _LIBCPP_OVERRIDABLE_FUNC_VIS 542# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 543# endif 544 545# define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 546# define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 547# define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 548# define _LIBCPP_HIDDEN 549# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 550# define _LIBCPP_TEMPLATE_VIS 551# define _LIBCPP_TEMPLATE_DATA_VIS 552# define _LIBCPP_ENUM_VIS 553 554# else 555 556# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 557# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) 558# else 559# define _LIBCPP_VISIBILITY(vis) 560# endif 561 562# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") 563# define _LIBCPP_FUNC_VIS _LIBCPP_VISIBILITY("default") 564# define _LIBCPP_TYPE_VIS _LIBCPP_VISIBILITY("default") 565# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") 566# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") 567# define _LIBCPP_EXCEPTION_ABI _LIBCPP_VISIBILITY("default") 568# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") 569# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 570 571// TODO: Make this a proper customization point or remove the option to override it. 572# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 573# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") 574# endif 575 576# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 577// The inline should be removed once PR32114 is resolved 578# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 579# else 580# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 581# endif 582 583# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 584# if __has_attribute(__type_visibility__) 585# define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default"))) 586# else 587# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 588# endif 589# else 590# define _LIBCPP_TEMPLATE_VIS 591# endif 592 593# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 594# define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default"))) 595# else 596# define _LIBCPP_ENUM_VIS 597# endif 598 599# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 600 601# if __has_attribute(exclude_from_explicit_instantiation) 602# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 603# else 604// Try to approximate the effect of exclude_from_explicit_instantiation 605// (which is that entities are not assumed to be provided by explicit 606// template instantiations in the dylib) by always inlining those entities. 607# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 608# endif 609 610// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved 611// on two levels: 612// 1. The symbol is given hidden visibility, which ensures that users won't start exporting 613// symbols from their dynamic library by means of using the libc++ headers. This ensures 614// that those symbols stay private to the dynamic library in which it is defined. 615// 616// 2. The symbol is given an ABI tag that changes with each version of libc++. This ensures 617// that no ODR violation can arise from mixing two TUs compiled with different versions 618// of libc++ where we would have changed the definition of a symbol. If the symbols shared 619// the same name, the ODR would require that their definitions be token-by-token equivalent, 620// which basically prevents us from being able to make any change to any function in our 621// headers. Using this ABI tag ensures that the symbol name is "bumped" artificially at 622// each release, which lets us change the definition of these symbols at our leisure. 623// Note that historically, this has been achieved in various ways, including force-inlining 624// all functions or giving internal linkage to all functions. Both these (previous) solutions 625// suffer from drawbacks that lead notably to code bloat. 626// 627// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend 628// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. 629// 630// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing 631// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and 632// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. 633# ifndef _LIBCPP_NO_ABI_TAG 634# define _LIBCPP_HIDE_FROM_ABI \ 635 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ 636 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER)))) 637# else 638# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 639# endif 640 641# ifdef _LIBCPP_BUILDING_LIBRARY 642# if _LIBCPP_ABI_VERSION > 1 643# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 644# else 645# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 646# endif 647# else 648# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 649# endif 650 651// Just so we can migrate to the new macros gradually. 652# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 653 654// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 655// clang-format off 656# define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 657# define _LIBCPP_END_NAMESPACE_STD }} 658# define _VSTD std 659 660_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 661 662# if _LIBCPP_STD_VER > 14 663# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 664 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 665# else 666# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 667 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 668# endif 669 670# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} 671// clang-format on 672 673# define _VSTD_FS std::__fs::filesystem 674 675# if __has_attribute(__enable_if__) 676# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 677# endif 678 679# ifndef __SIZEOF_INT128__ 680# define _LIBCPP_HAS_NO_INT128 681# endif 682 683# ifdef _LIBCPP_CXX03_LANG 684# define static_assert(...) _Static_assert(__VA_ARGS__) 685# define decltype(...) __decltype(__VA_ARGS__) 686# endif // _LIBCPP_CXX03_LANG 687 688# ifdef _LIBCPP_CXX03_LANG 689# define _LIBCPP_CONSTEXPR 690# else 691# define _LIBCPP_CONSTEXPR constexpr 692# endif 693 694# ifndef __cpp_consteval 695# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 696# else 697# define _LIBCPP_CONSTEVAL consteval 698# endif 699 700# ifdef __GNUC__ 701# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 702# else 703# define _LIBCPP_NOALIAS 704# endif 705 706# if __has_attribute(using_if_exists) 707# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 708# else 709# define _LIBCPP_USING_IF_EXISTS 710# endif 711 712# ifdef _LIBCPP_CXX03_LANG 713# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 714 struct _LIBCPP_TYPE_VIS x { \ 715 enum __lx 716// clang-format off 717# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 718 __lx __v_; \ 719 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 720 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 721 _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \ 722 }; 723// clang-format on 724 725# else // _LIBCPP_CXX03_LANG 726# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 727# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 728# endif // _LIBCPP_CXX03_LANG 729 730# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) || \ 731 defined(__NetBSD__) 732# define _LIBCPP_LOCALE__L_EXTENSIONS 1 733# endif 734 735# ifdef __FreeBSD__ 736# define _DECLARE_C99_LDBL_MATH 1 737# endif 738 739// If we are getting operator new from the MSVC CRT, then allocation overloads 740// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 741# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 742# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 743# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 744// We're deferring to Microsoft's STL to provide aligned new et al. We don't 745// have it unless the language feature test macro is defined. 746# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 747# elif defined(__MVS__) 748# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 749# endif 750 751# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 752# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 753# endif 754 755# if defined(__APPLE__) || defined(__FreeBSD__) 756# define _LIBCPP_HAS_DEFAULTRUNELOCALE 757# endif 758 759# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 760# define _LIBCPP_WCTYPE_IS_MASK 761# endif 762 763# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 764# define _LIBCPP_HAS_NO_CHAR8_T 765# endif 766 767// Deprecation macros. 768// 769// Deprecations warnings are always enabled, except when users explicitly opt-out 770// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 771# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 772# if __has_attribute(deprecated) 773# define _LIBCPP_DEPRECATED __attribute__((deprecated)) 774# define _LIBCPP_DEPRECATED_(m) __attribute__((deprected(m))) 775# elif _LIBCPP_STD_VER > 11 776# define _LIBCPP_DEPRECATED [[deprecated]] 777# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] 778# else 779# define _LIBCPP_DEPRECATED 780# define _LIBCPP_DEPRECATED_(m) 781# endif 782# else 783# define _LIBCPP_DEPRECATED 784# define _LIBCPP_DEPRECATED_(m) 785# endif 786 787# if !defined(_LIBCPP_CXX03_LANG) 788# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 789# else 790# define _LIBCPP_DEPRECATED_IN_CXX11 791# endif 792 793# if _LIBCPP_STD_VER > 11 794# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 795# else 796# define _LIBCPP_DEPRECATED_IN_CXX14 797# endif 798 799# if _LIBCPP_STD_VER > 14 800# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 801# else 802# define _LIBCPP_DEPRECATED_IN_CXX17 803# endif 804 805# if _LIBCPP_STD_VER > 17 806# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 807# else 808# define _LIBCPP_DEPRECATED_IN_CXX20 809# endif 810 811# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 812# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 813# else 814# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 815# endif 816 817// Macros to enter and leave a state where deprecation warnings are suppressed. 818# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 819# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 820 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 821 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 822# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 823# else 824# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 825# define _LIBCPP_SUPPRESS_DEPRECATED_POP 826# endif 827 828# if _LIBCPP_STD_VER <= 11 829# define _LIBCPP_EXPLICIT_AFTER_CXX11 830# else 831# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 832# endif 833 834# if _LIBCPP_STD_VER > 11 835# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 836# else 837# define _LIBCPP_CONSTEXPR_AFTER_CXX11 838# endif 839 840# if _LIBCPP_STD_VER > 14 841# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 842# else 843# define _LIBCPP_CONSTEXPR_AFTER_CXX14 844# endif 845 846# if _LIBCPP_STD_VER > 17 847# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 848# else 849# define _LIBCPP_CONSTEXPR_AFTER_CXX17 850# endif 851 852# if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 853# define _LIBCPP_NODISCARD [[nodiscard]] 854# elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 855# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 856# else 857// We can't use GCC's [[gnu::warn_unused_result]] and 858// __attribute__((warn_unused_result)), because GCC does not silence them via 859// (void) cast. 860# define _LIBCPP_NODISCARD 861# endif 862 863// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 864// specified as such as an extension. 865# if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 866# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 867# else 868# define _LIBCPP_NODISCARD_EXT 869# endif 870 871# if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 872# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 873# else 874# define _LIBCPP_NODISCARD_AFTER_CXX17 875# endif 876 877# if __has_attribute(no_destroy) 878# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 879# else 880# define _LIBCPP_NO_DESTROY 881# endif 882 883# ifndef _LIBCPP_HAS_NO_ASAN 884 extern "C" _LIBCPP_FUNC_VIS void 885 __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); 886# endif 887 888// Try to find out if RTTI is disabled. 889# if !defined(__cpp_rtti) || __cpp_rtti < 199711L 890# define _LIBCPP_NO_RTTI 891# endif 892 893# ifndef _LIBCPP_WEAK 894# define _LIBCPP_WEAK __attribute__((__weak__)) 895# endif 896 897// Thread API 898// clang-format off 899# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 900 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 901 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 902 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 903 904# if defined(__FreeBSD__) || \ 905 defined(__wasi__) || \ 906 defined(__NetBSD__) || \ 907 defined(__OpenBSD__) || \ 908 defined(__NuttX__) || \ 909 defined(__linux__) || \ 910 defined(__GNU__) || \ 911 defined(__APPLE__) || \ 912 defined(__sun__) || \ 913 defined(__MVS__) || \ 914 defined(_AIX) || \ 915 defined(__EMSCRIPTEN__) 916// clang-format on 917# define _LIBCPP_HAS_THREAD_API_PTHREAD 918# elif defined(__Fuchsia__) 919// TODO(44575): Switch to C11 thread API when possible. 920# define _LIBCPP_HAS_THREAD_API_PTHREAD 921# elif defined(_LIBCPP_WIN32API) 922# define _LIBCPP_HAS_THREAD_API_WIN32 923# else 924# error "No thread API" 925# endif // _LIBCPP_HAS_THREAD_API 926# endif // _LIBCPP_HAS_NO_THREADS 927 928# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 929# if defined(__ANDROID__) && __ANDROID_API__ >= 30 930# define _LIBCPP_HAS_COND_CLOCKWAIT 931# elif defined(_LIBCPP_GLIBC_PREREQ) 932# if _LIBCPP_GLIBC_PREREQ(2, 30) 933# define _LIBCPP_HAS_COND_CLOCKWAIT 934# endif 935# endif 936# endif 937 938# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 939# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 940 _LIBCPP_HAS_NO_THREADS is not defined. 941# endif 942 943# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 944# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 945 _LIBCPP_HAS_NO_THREADS is defined. 946# endif 947 948# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 949# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 950 _LIBCPP_HAS_NO_THREADS is defined. 951# endif 952 953# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 954# define __STDCPP_THREADS__ 1 955# endif 956 957// The glibc and Bionic implementation of pthreads implements 958// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 959// mutexes have no destroy mechanism. 960// 961// This optimization can't be performed on Apple platforms, where 962// pthread_mutex_destroy can allow the kernel to release resources. 963// See https://llvm.org/D64298 for details. 964// 965// TODO(EricWF): Enable this optimization on Bionic after speaking to their 966// respective stakeholders. 967// clang-format off 968# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 969 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 970 defined(_LIBCPP_HAS_THREAD_API_WIN32) 971// clang-format on 972# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 973# endif 974 975// Destroying a condvar is a nop on Windows. 976// 977// This optimization can't be performed on Apple platforms, where 978// pthread_cond_destroy can allow the kernel to release resources. 979// See https://llvm.org/D64298 for details. 980// 981// TODO(EricWF): This is potentially true for some pthread implementations 982// as well. 983# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 984# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 985# endif 986 987// Some systems do not provide gets() in their C library, for security reasons. 988# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) 989# define _LIBCPP_C_HAS_NO_GETS 990# endif 991 992# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 993 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 994# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 995# endif 996 997# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 998# define _LIBCPP_HAS_C_ATOMIC_IMP 999# elif defined(_LIBCPP_COMPILER_GCC) 1000# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1001# endif 1002 1003# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1004 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1005# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1006# else 1007# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1008# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1009# endif 1010# ifdef _LIBCPP_FREESTANDING 1011# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1012# endif 1013# endif 1014 1015# ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1016# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1017# endif 1018 1019# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1020# if defined(__clang__) && __has_attribute(acquire_capability) 1021// Work around the attribute handling in clang. When both __declspec and 1022// __attribute__ are present, the processing goes awry preventing the definition 1023// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1024// combining the two does work. 1025# if !defined(_MSC_VER) 1026# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1027# endif 1028# endif 1029# endif 1030 1031# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1032# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1033# else 1034# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1035# endif 1036 1037# if _LIBCPP_STD_VER > 17 1038# define _LIBCPP_CONSTINIT constinit 1039# elif __has_attribute(require_constant_initialization) 1040# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1041# else 1042# define _LIBCPP_CONSTINIT 1043# endif 1044 1045# if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1046# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1047# define _LIBCPP_DIAGNOSE_ERROR(...) __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1048# else 1049# define _LIBCPP_DIAGNOSE_WARNING(...) 1050# define _LIBCPP_DIAGNOSE_ERROR(...) 1051# endif 1052 1053// Use a function like macro to imply that it must be followed by a semicolon 1054# if __has_cpp_attribute(fallthrough) 1055# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1056# elif __has_attribute(__fallthrough__) 1057# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1058# else 1059# define _LIBCPP_FALLTHROUGH() ((void)0) 1060# endif 1061 1062# if __has_attribute(__nodebug__) 1063# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1064# else 1065# define _LIBCPP_NODEBUG 1066# endif 1067 1068# if __has_attribute(__standalone_debug__) 1069# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1070# else 1071# define _LIBCPP_STANDALONE_DEBUG 1072# endif 1073 1074# if __has_attribute(__preferred_name__) 1075# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1076# else 1077# define _LIBCPP_PREFERRED_NAME(x) 1078# endif 1079 1080// We often repeat things just for handling wide characters in the library. 1081// When wide characters are disabled, it can be useful to have a quick way of 1082// disabling it without having to resort to #if-#endif, which has a larger 1083// impact on readability. 1084# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1085# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1086# else 1087# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1088# endif 1089 1090# if defined(_LIBCPP_ABI_MICROSOFT) && (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1091# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1092# else 1093# define _LIBCPP_DECLSPEC_EMPTY_BASES 1094# endif 1095 1096# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1097# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1098# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1099# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1100# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1101# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1102# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1103 1104// Leave the deprecation notices in by default, but don't remove unary_function and 1105// binary_function entirely just yet. That way, folks will have one release to act 1106// on the deprecation warnings. 1107# ifndef _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1108# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1109# endif 1110 1111# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1112# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1113# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION 1114# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1115# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1116# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1117# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1118# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1119 1120# if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1121# define _LIBCPP_HAS_NO_CXX20_COROUTINES 1122# endif 1123 1124# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") 1125# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") 1126 1127# ifndef _LIBCPP_NO_AUTO_LINK 1128# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1129# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1130# pragma comment(lib, "c++.lib") 1131# else 1132# pragma comment(lib, "libc++.lib") 1133# endif 1134# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1135# endif // _LIBCPP_NO_AUTO_LINK 1136 1137// Configures the fopen close-on-exec mode character, if any. This string will 1138// be appended to any mode string used by fstream for fopen/fdopen. 1139// 1140// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1141// do. 1142# if defined(__BIONIC__) 1143# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1144# else 1145# define _LIBCPP_FOPEN_CLOEXEC_MODE 1146# endif 1147 1148// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1149// of functions used in cstdio may not be available for low API levels when 1150// using 64-bit file offsets on LP32. 1151# if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1152# define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1153# endif 1154 1155# if __has_attribute(init_priority) 1156// TODO: Remove this once we drop support for building libc++ with old Clangs 1157# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1158 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1159# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1160# else 1161# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1162# endif 1163# else 1164# define _LIBCPP_INIT_PRIORITY_MAX 1165# endif 1166 1167# if defined(__GNUC__) || defined(__clang__) 1168// The attribute uses 1-based indices for ordinary and static member functions. 1169// The attribute uses 2-based indices for non-static member functions. 1170# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1171 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1172# else 1173# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1174# endif 1175 1176# if __has_cpp_attribute(msvc::no_unique_address) 1177// MSVC implements [[no_unique_address]] as a silent no-op currently. 1178// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1179// However, MSVC implements [[msvc::no_unique_address]] which does what 1180// [[no_unique_address]] is supposed to do, in general. 1181 1182// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1183// [[msvc::no_unique_address]] though. If/when it does implement 1184// [[msvc::no_unique_address]], this should be preferred though. 1185# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1186# elif __has_cpp_attribute(no_unique_address) 1187# define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] 1188# else 1189# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1190// Note that this can be replaced by #error as soon as clang-cl 1191// implements msvc::no_unique_address, since there should be no C++20 1192// compiler that doesn't support one of the two attributes at that point. 1193// We generally don't want to use this macro outside of C++20-only code, 1194// because using it conditionally in one language version only would make 1195// the ABI inconsistent. 1196# endif 1197 1198# ifdef _LIBCPP_COMPILER_CLANG_BASED 1199# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1200# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1201# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1202# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1203# elif defined(_LIBCPP_COMPILER_GCC) 1204# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1205# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1206# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1207# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1208# else 1209# define _LIBCPP_DIAGNOSTIC_PUSH 1210# define _LIBCPP_DIAGNOSTIC_POP 1211# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1212# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1213# endif 1214 1215# if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) 1216# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") 1217# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") 1218# else 1219# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ 1220# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ 1221# endif 1222 1223# if __has_attribute(__packed__) 1224# define _LIBCPP_PACKED __attribute__((__packed__)) 1225# else 1226# define _LIBCPP_PACKED 1227# endif 1228 1229#endif // __cplusplus 1230 1231#endif // _LIBCPP___CONFIG 1232