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#ifdef __cplusplus 26 27# define _LIBCPP_VERSION 15000 28 29# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y 30# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) 31 32// Valid C++ identifier that revs with every libc++ version. This can be used to 33// generate identifiers that must be unique for every released libc++ version. 34# define _LIBCPP_VERSIONED_IDENTIFIER _LIBCPP_CONCAT(v, _LIBCPP_VERSION) 35 36# if __STDC_HOSTED__ == 0 37# define _LIBCPP_FREESTANDING 38# endif 39 40# ifndef _LIBCPP_STD_VER 41# if __cplusplus <= 201103L 42# define _LIBCPP_STD_VER 11 43# elif __cplusplus <= 201402L 44# define _LIBCPP_STD_VER 14 45# elif __cplusplus <= 201703L 46# define _LIBCPP_STD_VER 17 47# elif __cplusplus <= 202002L 48# define _LIBCPP_STD_VER 20 49# else 50# define _LIBCPP_STD_VER 22 // current year, or date of c++2b ratification 51# endif 52# endif // _LIBCPP_STD_VER 53 54# if defined(__ELF__) 55# define _LIBCPP_OBJECT_FORMAT_ELF 1 56# elif defined(__MACH__) 57# define _LIBCPP_OBJECT_FORMAT_MACHO 1 58# elif defined(_WIN32) 59# define _LIBCPP_OBJECT_FORMAT_COFF 1 60# elif defined(__wasm__) 61# define _LIBCPP_OBJECT_FORMAT_WASM 1 62# elif defined(_AIX) 63# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 64# else 65// ... add new file formats here ... 66# endif 67 68# if _LIBCPP_ABI_VERSION >= 2 69// Change short string representation so that string data starts at offset 0, 70// improving its alignment in some cases. 71# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 72// Fix deque iterator type in order to support incomplete types. 73# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 74// Fix undefined behavior in how std::list stores its linked nodes. 75# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 76// Fix undefined behavior in how __tree stores its end and parent nodes. 77# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 78// Fix undefined behavior in how __hash_table stores its pointer types. 79# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 80# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 81# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 82// Define a key function for `bad_function_call` in the library, to centralize 83// its vtable and typeinfo to libc++ rather than having all other libraries 84// using that class define their own copies. 85# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 86// Override the default return value of exception::what() for 87// bad_function_call::what() with a string that is specific to 88// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 89// because it changes the vtable layout of bad_function_call. 90# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 91// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 92# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 93// Give reverse_iterator<T> one data member of type T, not two. 94// Also, in C++17 and later, don't derive iterator types from std::iterator. 95# define _LIBCPP_ABI_NO_ITERATOR_BASES 96// Use the smallest possible integer type to represent the index of the variant. 97// Previously libc++ used "unsigned int" exclusively. 98# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 99// Unstable attempt to provide a more optimized std::function 100# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 101// All the regex constants must be distinct and nonzero. 102# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 103// Re-worked external template instantiations for std::string with a focus on 104// performance and fast-path inlining. 105# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 106// Enable clang::trivial_abi on std::unique_ptr. 107# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 108// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 109# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 110// std::random_device holds some state when it uses an implementation that gets 111// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 112// implementation to another one on a platform that has already shipped 113// std::random_device, one needs to retain the same object layout to remain ABI 114// compatible. This switch removes these workarounds for platforms that don't care 115// about ABI compatibility. 116# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 117// Don't export the legacy __basic_string_common class and its methods from the built library. 118# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 119// Don't export the legacy __vector_base_common class and its methods from the built library. 120# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 121// According to the Standard, `bitset::operator[] const` returns bool 122# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 123// Remove the base 10 implementation of std::to_chars from the dylib. 124// The implementation moved to the header, but we still export the symbols from 125// the dylib for backwards compatibility. 126# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 127# elif _LIBCPP_ABI_VERSION == 1 128# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 129// Enable compiling copies of now inline methods into the dylib to support 130// applications compiled against older libraries. This is unnecessary with 131// COFF dllexport semantics, since dllexport forces a non-inline definition 132// of inline functions to be emitted anyway. Our own non-inline copy would 133// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 134// the linker will take issue with the symbols in the shared object if the 135// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 136// so disable it. 137# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 138# endif 139// Feature macros for disabling pre ABI v1 features. All of these options 140// are deprecated. 141# if defined(__FreeBSD__) 142# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 143# endif 144# endif 145 146# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 147// Enable additional explicit instantiations of iostreams components. This 148// reduces the number of weak definitions generated in programs that use 149// iostreams by providing a single strong definition in the shared library. 150# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 151 152// Define a key function for `bad_function_call` in the library, to centralize 153// its vtable and typeinfo to libc++ rather than having all other libraries 154// using that class define their own copies. 155# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 156# endif 157 158# define _LIBCPP_TOSTRING2(x) # x 159# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 160 161# if __cplusplus < 201103L 162# define _LIBCPP_CXX03_LANG 163# endif 164 165# ifndef __has_attribute 166# define __has_attribute(__x) 0 167# endif 168 169# ifndef __has_builtin 170# define __has_builtin(__x) 0 171# endif 172 173# ifndef __has_extension 174# define __has_extension(__x) 0 175# endif 176 177# ifndef __has_feature 178# define __has_feature(__x) 0 179# endif 180 181# ifndef __has_cpp_attribute 182# define __has_cpp_attribute(__x) 0 183# endif 184 185// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 186// the compiler and '1' otherwise. 187# ifndef __is_identifier 188# define __is_identifier(__x) 1 189# endif 190 191# ifndef __has_declspec_attribute 192# define __has_declspec_attribute(__x) 0 193# endif 194 195# define __has_keyword(__x) !(__is_identifier(__x)) 196 197# ifndef __has_include 198# define __has_include(...) 0 199# endif 200 201# if defined(__apple_build_version__) 202# define _LIBCPP_COMPILER_CLANG_BASED 203# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 204# elif defined(__clang__) 205# define _LIBCPP_COMPILER_CLANG_BASED 206# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 207# elif defined(__GNUC__) 208# define _LIBCPP_COMPILER_GCC 209# elif defined(_MSC_VER) 210# define _LIBCPP_COMPILER_MSVC 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// Need to detect which libc we're using if we're on Linux. 247# if defined(__linux__) 248# include <features.h> 249# if defined(__GLIBC_PREREQ) 250# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 251# else 252# define _LIBCPP_GLIBC_PREREQ(a, b) 0 253# endif // defined(__GLIBC_PREREQ) 254# endif // defined(__linux__) 255 256# if defined(__MVS__) 257# include <features.h> // for __NATIVE_ASCII_F 258# endif 259 260# ifdef __LITTLE_ENDIAN__ 261# if __LITTLE_ENDIAN__ 262# define _LIBCPP_LITTLE_ENDIAN 263# endif // __LITTLE_ENDIAN__ 264# endif // __LITTLE_ENDIAN__ 265 266# ifdef __BIG_ENDIAN__ 267# if __BIG_ENDIAN__ 268# define _LIBCPP_BIG_ENDIAN 269# endif // __BIG_ENDIAN__ 270# endif // __BIG_ENDIAN__ 271 272# ifdef __BYTE_ORDER__ 273# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 274# define _LIBCPP_LITTLE_ENDIAN 275# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 276# define _LIBCPP_BIG_ENDIAN 277# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 278# endif // __BYTE_ORDER__ 279 280# ifdef __FreeBSD__ 281# include <sys/endian.h> 282# include <osreldate.h> 283# if _BYTE_ORDER == _LITTLE_ENDIAN 284# define _LIBCPP_LITTLE_ENDIAN 285# else // _BYTE_ORDER == _LITTLE_ENDIAN 286# define _LIBCPP_BIG_ENDIAN 287# endif // _BYTE_ORDER == _LITTLE_ENDIAN 288# endif // __FreeBSD__ 289 290# if defined(__NetBSD__) || defined(__OpenBSD__) 291# include <sys/endian.h> 292# if _BYTE_ORDER == _LITTLE_ENDIAN 293# define _LIBCPP_LITTLE_ENDIAN 294# else // _BYTE_ORDER == _LITTLE_ENDIAN 295# define _LIBCPP_BIG_ENDIAN 296# endif // _BYTE_ORDER == _LITTLE_ENDIAN 297# endif // defined(__NetBSD__) || defined(__OpenBSD__) 298 299# if defined(_WIN32) 300# define _LIBCPP_WIN32API 301# define _LIBCPP_LITTLE_ENDIAN 302# define _LIBCPP_SHORT_WCHAR 1 303// Both MinGW and native MSVC provide a "MSVC"-like environment 304# define _LIBCPP_MSVCRT_LIKE 305// If mingw not explicitly detected, assume using MS C runtime only if 306// a MS compatibility version is specified. 307# if defined(_MSC_VER) && !defined(__MINGW32__) 308# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 309# endif 310# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 311# define _LIBCPP_HAS_BITSCAN64 312# endif 313# define _LIBCPP_HAS_OPEN_WITH_WCHAR 314# endif // defined(_WIN32) 315 316# ifdef __sun__ 317# include <sys/isa_defs.h> 318# ifdef _LITTLE_ENDIAN 319# define _LIBCPP_LITTLE_ENDIAN 320# else 321# define _LIBCPP_BIG_ENDIAN 322# endif 323# endif // __sun__ 324 325# if defined(_AIX) && !defined(__64BIT__) 326// The size of wchar is 2 byte on 32-bit mode on AIX. 327# define _LIBCPP_SHORT_WCHAR 1 328# endif 329 330// Libc++ supports various implementations of std::random_device. 331// 332// _LIBCPP_USING_DEV_RANDOM 333// Read entropy from the given file, by default `/dev/urandom`. 334// If a token is provided, it is assumed to be the path to a file 335// to read entropy from. This is the default behavior if nothing 336// else is specified. This implementation requires storing state 337// inside `std::random_device`. 338// 339// _LIBCPP_USING_ARC4_RANDOM 340// Use arc4random(). This allows obtaining random data even when 341// using sandboxing mechanisms. On some platforms like Apple, this 342// is the recommended source of entropy for user-space programs. 343// When this option is used, the token passed to `std::random_device`'s 344// constructor *must* be "/dev/urandom" -- anything else is an error. 345// 346// _LIBCPP_USING_GETENTROPY 347// Use getentropy(). 348// When this option is used, the token passed to `std::random_device`'s 349// constructor *must* be "/dev/urandom" -- anything else is an error. 350// 351// _LIBCPP_USING_FUCHSIA_CPRNG 352// Use Fuchsia's zx_cprng_draw() system call, which is specified to 353// deliver high-quality entropy and cannot fail. 354// When this option is used, the token passed to `std::random_device`'s 355// constructor *must* be "/dev/urandom" -- anything else is an error. 356// 357// _LIBCPP_USING_NACL_RANDOM 358// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 359// including accesses to the special files under `/dev`. This implementation 360// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 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_WIN32_RANDOM 365// Use rand_s(), for use on Windows. 366// When this option is used, the token passed to `std::random_device`'s 367// constructor *must* be "/dev/urandom" -- anything else is an error. 368# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 369 defined(__DragonFly__) || defined(__sun__) 370# define _LIBCPP_USING_ARC4_RANDOM 371# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 372# define _LIBCPP_USING_GETENTROPY 373# elif defined(__Fuchsia__) 374# define _LIBCPP_USING_FUCHSIA_CPRNG 375# elif defined(__native_client__) 376# define _LIBCPP_USING_NACL_RANDOM 377# elif defined(_LIBCPP_WIN32API) 378# define _LIBCPP_USING_WIN32_RANDOM 379# else 380# define _LIBCPP_USING_DEV_RANDOM 381# endif 382 383# if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 384# include <endian.h> 385# if __BYTE_ORDER == __LITTLE_ENDIAN 386# define _LIBCPP_LITTLE_ENDIAN 387# elif __BYTE_ORDER == __BIG_ENDIAN 388# define _LIBCPP_BIG_ENDIAN 389# else // __BYTE_ORDER == __BIG_ENDIAN 390# error unable to determine endian 391# endif 392# endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 393 394# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 395# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 396# else 397# define _LIBCPP_NO_CFI 398# endif 399 400# ifndef _LIBCPP_CXX03_LANG 401 402# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 403# define _ALIGNAS_TYPE(x) alignas(x) 404# define _ALIGNAS(x) alignas(x) 405# define _LIBCPP_NORETURN [[noreturn]] 406# define _NOEXCEPT noexcept 407# define _NOEXCEPT_(x) noexcept(x) 408 409# else 410 411# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 412# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 413# define _ALIGNAS(x) __attribute__((__aligned__(x))) 414# define _LIBCPP_NORETURN __attribute__((noreturn)) 415# define _LIBCPP_HAS_NO_NOEXCEPT 416# define nullptr __nullptr 417# define _NOEXCEPT throw() 418# define _NOEXCEPT_(x) 419 420typedef __char16_t char16_t; 421typedef __char32_t char32_t; 422 423# endif 424 425# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L 426# define _LIBCPP_NO_EXCEPTIONS 427# endif 428 429# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 430 431# if defined(_LIBCPP_COMPILER_CLANG_BASED) 432 433# if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 434# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 435# endif 436 437// Objective-C++ features (opt-in) 438# if __has_feature(objc_arc) 439# define _LIBCPP_HAS_OBJC_ARC 440# endif 441 442# if __has_feature(objc_arc_weak) 443# define _LIBCPP_HAS_OBJC_ARC_WEAK 444# endif 445 446# if __has_extension(blocks) 447# define _LIBCPP_HAS_EXTENSION_BLOCKS 448# endif 449 450# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 451# define _LIBCPP_HAS_BLOCKS_RUNTIME 452# endif 453 454# if !__has_feature(address_sanitizer) 455# define _LIBCPP_HAS_NO_ASAN 456# endif 457 458// Allow for build-time disabling of unsigned integer sanitization 459# if __has_attribute(no_sanitize) 460# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 461# endif 462 463# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 464 465# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 466 467# elif defined(_LIBCPP_COMPILER_GCC) 468 469# if !defined(__SANITIZE_ADDRESS__) 470# define _LIBCPP_HAS_NO_ASAN 471# endif 472 473# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 474 475# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 476 477# elif defined(_LIBCPP_COMPILER_MSVC) 478 479# define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 480 481# if _MSC_VER < 1900 482# error "MSVC versions prior to Visual Studio 2015 are not supported" 483# endif 484 485# define _LIBCPP_NORETURN __declspec(noreturn) 486 487# define _LIBCPP_WEAK 488 489# define _LIBCPP_HAS_NO_ASAN 490 491# define _LIBCPP_ALWAYS_INLINE __forceinline 492 493# define _LIBCPP_HAS_NO_VECTOR_EXTENSION 494 495# define _LIBCPP_DISABLE_EXTENSION_WARNING 496 497# endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC] 498 499# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 500 501# ifdef _DLL 502# define _LIBCPP_CRT_FUNC __declspec(dllimport) 503# else 504# define _LIBCPP_CRT_FUNC 505# endif 506 507# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 508# define _LIBCPP_DLL_VIS 509# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 510# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 511# define _LIBCPP_OVERRIDABLE_FUNC_VIS 512# define _LIBCPP_EXPORTED_FROM_ABI 513# elif defined(_LIBCPP_BUILDING_LIBRARY) 514# define _LIBCPP_DLL_VIS __declspec(dllexport) 515# if defined(__MINGW32__) 516# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 517# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 518# else 519# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 520# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 521# endif 522# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 523# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 524# else 525# define _LIBCPP_DLL_VIS __declspec(dllimport) 526# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 527# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 528# define _LIBCPP_OVERRIDABLE_FUNC_VIS 529# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 530# endif 531 532# define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 533# define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 534# define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 535# define _LIBCPP_HIDDEN 536# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 537# define _LIBCPP_TEMPLATE_VIS 538# define _LIBCPP_TEMPLATE_DATA_VIS 539# define _LIBCPP_ENUM_VIS 540 541# else 542 543# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 544# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) 545# else 546# define _LIBCPP_VISIBILITY(vis) 547# endif 548 549# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") 550# define _LIBCPP_FUNC_VIS _LIBCPP_VISIBILITY("default") 551# define _LIBCPP_TYPE_VIS _LIBCPP_VISIBILITY("default") 552# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") 553# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") 554# define _LIBCPP_EXCEPTION_ABI _LIBCPP_VISIBILITY("default") 555# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") 556# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 557 558// TODO: Make this a proper customization point or remove the option to override it. 559# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 560# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") 561# endif 562 563# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 564// The inline should be removed once PR32114 is resolved 565# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 566# else 567# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 568# endif 569 570# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 571# if __has_attribute(__type_visibility__) 572# define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default"))) 573# else 574# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 575# endif 576# else 577# define _LIBCPP_TEMPLATE_VIS 578# endif 579 580# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 581# define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default"))) 582# else 583# define _LIBCPP_ENUM_VIS 584# endif 585 586# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 587 588# if __has_attribute(exclude_from_explicit_instantiation) 589# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 590# else 591// Try to approximate the effect of exclude_from_explicit_instantiation 592// (which is that entities are not assumed to be provided by explicit 593// template instantiations in the dylib) by always inlining those entities. 594# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 595# endif 596 597// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved 598// on two levels: 599// 1. The symbol is given hidden visibility, which ensures that users won't start exporting 600// symbols from their dynamic library by means of using the libc++ headers. This ensures 601// that those symbols stay private to the dynamic library in which it is defined. 602// 603// 2. The symbol is given an ABI tag that changes with each version of libc++. This ensures 604// that no ODR violation can arise from mixing two TUs compiled with different versions 605// of libc++ where we would have changed the definition of a symbol. If the symbols shared 606// the same name, the ODR would require that their definitions be token-by-token equivalent, 607// which basically prevents us from being able to make any change to any function in our 608// headers. Using this ABI tag ensures that the symbol name is "bumped" artificially at 609// each release, which lets us change the definition of these symbols at our leisure. 610// Note that historically, this has been achieved in various ways, including force-inlining 611// all functions or giving internal linkage to all functions. Both these (previous) solutions 612// suffer from drawbacks that lead notably to code bloat. 613// 614// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend 615// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. 616// 617// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing 618// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and 619// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. 620# ifndef _LIBCPP_NO_ABI_TAG 621# define _LIBCPP_HIDE_FROM_ABI \ 622 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ 623 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER)))) 624# else 625# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 626# endif 627 628# ifdef _LIBCPP_BUILDING_LIBRARY 629# if _LIBCPP_ABI_VERSION > 1 630# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 631# else 632# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 633# endif 634# else 635# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 636# endif 637 638// Just so we can migrate to the new macros gradually. 639# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 640 641// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 642// clang-format off 643# define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 644# define _LIBCPP_END_NAMESPACE_STD }} 645# define _VSTD std 646 647_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 648 649# if _LIBCPP_STD_VER > 14 650# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 651 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 652# else 653# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 654 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 655# endif 656 657# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} 658// clang-format on 659 660# define _VSTD_FS std::__fs::filesystem 661 662# if __has_attribute(__enable_if__) 663# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 664# endif 665 666# ifndef __SIZEOF_INT128__ 667# define _LIBCPP_HAS_NO_INT128 668# endif 669 670# ifdef _LIBCPP_CXX03_LANG 671# define static_assert(...) _Static_assert(__VA_ARGS__) 672# define decltype(...) __decltype(__VA_ARGS__) 673# endif // _LIBCPP_CXX03_LANG 674 675# ifdef _LIBCPP_CXX03_LANG 676# define _LIBCPP_CONSTEXPR 677# else 678# define _LIBCPP_CONSTEXPR constexpr 679# endif 680 681# ifndef __cpp_consteval 682# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 683# else 684# define _LIBCPP_CONSTEVAL consteval 685# endif 686 687# ifdef __GNUC__ 688# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 689# else 690# define _LIBCPP_NOALIAS 691# endif 692 693# if __has_attribute(using_if_exists) 694# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 695# else 696# define _LIBCPP_USING_IF_EXISTS 697# endif 698 699# ifdef _LIBCPP_CXX03_LANG 700# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 701 struct _LIBCPP_TYPE_VIS x { \ 702 enum __lx 703// clang-format off 704# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 705 __lx __v_; \ 706 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 707 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 708 _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \ 709 }; 710// clang-format on 711 712# else // _LIBCPP_CXX03_LANG 713# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 714# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 715# endif // _LIBCPP_CXX03_LANG 716 717# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) || \ 718 defined(__NetBSD__) 719# define _LIBCPP_LOCALE__L_EXTENSIONS 1 720# endif 721 722# ifdef __FreeBSD__ 723# define _DECLARE_C99_LDBL_MATH 1 724# endif 725 726// If we are getting operator new from the MSVC CRT, then allocation overloads 727// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 728# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 729# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 730# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 731// We're deferring to Microsoft's STL to provide aligned new et al. We don't 732// have it unless the language feature test macro is defined. 733# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 734# elif defined(__MVS__) 735# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 736# endif 737 738# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 739# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 740# endif 741 742# if defined(__APPLE__) || defined(__FreeBSD__) 743# define _LIBCPP_HAS_DEFAULTRUNELOCALE 744# endif 745 746# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 747# define _LIBCPP_WCTYPE_IS_MASK 748# endif 749 750# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 751# define _LIBCPP_HAS_NO_CHAR8_T 752# endif 753 754// Deprecation macros. 755// 756// Deprecations warnings are always enabled, except when users explicitly opt-out 757// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 758# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 759# if __has_attribute(deprecated) 760# define _LIBCPP_DEPRECATED __attribute__((deprecated)) 761# define _LIBCPP_DEPRECATED_(m) __attribute__((deprected(m))) 762# elif _LIBCPP_STD_VER > 11 763# define _LIBCPP_DEPRECATED [[deprecated]] 764# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] 765# else 766# define _LIBCPP_DEPRECATED 767# define _LIBCPP_DEPRECATED_(m) 768# endif 769# else 770# define _LIBCPP_DEPRECATED 771# define _LIBCPP_DEPRECATED_(m) 772# endif 773 774# if !defined(_LIBCPP_CXX03_LANG) 775# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 776# else 777# define _LIBCPP_DEPRECATED_IN_CXX11 778# endif 779 780# if _LIBCPP_STD_VER > 11 781# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 782# else 783# define _LIBCPP_DEPRECATED_IN_CXX14 784# endif 785 786# if _LIBCPP_STD_VER > 14 787# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 788# else 789# define _LIBCPP_DEPRECATED_IN_CXX17 790# endif 791 792# if _LIBCPP_STD_VER > 17 793# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 794# else 795# define _LIBCPP_DEPRECATED_IN_CXX20 796# endif 797 798# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 799# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 800# else 801# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 802# endif 803 804// Macros to enter and leave a state where deprecation warnings are suppressed. 805# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 806# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 807 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 808 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 809# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 810# else 811# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 812# define _LIBCPP_SUPPRESS_DEPRECATED_POP 813# endif 814 815# if _LIBCPP_STD_VER <= 11 816# define _LIBCPP_EXPLICIT_AFTER_CXX11 817# else 818# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 819# endif 820 821# if _LIBCPP_STD_VER > 11 822# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 823# else 824# define _LIBCPP_CONSTEXPR_AFTER_CXX11 825# endif 826 827# if _LIBCPP_STD_VER > 14 828# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 829# else 830# define _LIBCPP_CONSTEXPR_AFTER_CXX14 831# endif 832 833# if _LIBCPP_STD_VER > 17 834# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 835# else 836# define _LIBCPP_CONSTEXPR_AFTER_CXX17 837# endif 838 839# if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 840# define _LIBCPP_NODISCARD [[nodiscard]] 841# elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 842# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 843# else 844// We can't use GCC's [[gnu::warn_unused_result]] and 845// __attribute__((warn_unused_result)), because GCC does not silence them via 846// (void) cast. 847# define _LIBCPP_NODISCARD 848# endif 849 850// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 851// specified as such as an extension. 852# if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 853# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 854# else 855# define _LIBCPP_NODISCARD_EXT 856# endif 857 858# if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 859# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 860# else 861# define _LIBCPP_NODISCARD_AFTER_CXX17 862# endif 863 864# if __has_attribute(no_destroy) 865# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 866# else 867# define _LIBCPP_NO_DESTROY 868# endif 869 870# ifndef _LIBCPP_HAS_NO_ASAN 871 extern "C" _LIBCPP_FUNC_VIS void 872 __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); 873# endif 874 875// Try to find out if RTTI is disabled. 876# if !defined(__cpp_rtti) || __cpp_rtti < 199711L 877# define _LIBCPP_NO_RTTI 878# endif 879 880# ifndef _LIBCPP_WEAK 881# define _LIBCPP_WEAK __attribute__((__weak__)) 882# endif 883 884// Thread API 885// clang-format off 886# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 887 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 888 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 889 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 890 891# if defined(__FreeBSD__) || \ 892 defined(__wasi__) || \ 893 defined(__NetBSD__) || \ 894 defined(__OpenBSD__) || \ 895 defined(__NuttX__) || \ 896 defined(__linux__) || \ 897 defined(__GNU__) || \ 898 defined(__APPLE__) || \ 899 defined(__sun__) || \ 900 defined(__MVS__) || \ 901 defined(_AIX) || \ 902 defined(__EMSCRIPTEN__) 903// clang-format on 904# define _LIBCPP_HAS_THREAD_API_PTHREAD 905# elif defined(__Fuchsia__) 906// TODO(44575): Switch to C11 thread API when possible. 907# define _LIBCPP_HAS_THREAD_API_PTHREAD 908# elif defined(_LIBCPP_WIN32API) 909# define _LIBCPP_HAS_THREAD_API_WIN32 910# else 911# error "No thread API" 912# endif // _LIBCPP_HAS_THREAD_API 913# endif // _LIBCPP_HAS_NO_THREADS 914 915# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 916# if defined(__ANDROID__) && __ANDROID_API__ >= 30 917# define _LIBCPP_HAS_COND_CLOCKWAIT 918# elif defined(_LIBCPP_GLIBC_PREREQ) 919# if _LIBCPP_GLIBC_PREREQ(2, 30) 920# define _LIBCPP_HAS_COND_CLOCKWAIT 921# endif 922# endif 923# endif 924 925# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 926# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 927 _LIBCPP_HAS_NO_THREADS is not defined. 928# endif 929 930# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 931# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 932 _LIBCPP_HAS_NO_THREADS is defined. 933# endif 934 935# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 936# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 937 _LIBCPP_HAS_NO_THREADS is defined. 938# endif 939 940# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 941# define __STDCPP_THREADS__ 1 942# endif 943 944// The glibc and Bionic implementation of pthreads implements 945// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 946// mutexes have no destroy mechanism. 947// 948// This optimization can't be performed on Apple platforms, where 949// pthread_mutex_destroy can allow the kernel to release resources. 950// See https://llvm.org/D64298 for details. 951// 952// TODO(EricWF): Enable this optimization on Bionic after speaking to their 953// respective stakeholders. 954// clang-format off 955# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 956 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 957 defined(_LIBCPP_HAS_THREAD_API_WIN32) 958// clang-format on 959# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 960# endif 961 962// Destroying a condvar is a nop on Windows. 963// 964// This optimization can't be performed on Apple platforms, where 965// pthread_cond_destroy can allow the kernel to release resources. 966// See https://llvm.org/D64298 for details. 967// 968// TODO(EricWF): This is potentially true for some pthread implementations 969// as well. 970# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 971# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 972# endif 973 974// Some systems do not provide gets() in their C library, for security reasons. 975# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) 976# define _LIBCPP_C_HAS_NO_GETS 977# endif 978 979# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 980 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 981# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 982# endif 983 984# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 985# define _LIBCPP_HAS_C_ATOMIC_IMP 986# elif defined(_LIBCPP_COMPILER_GCC) 987# define _LIBCPP_HAS_GCC_ATOMIC_IMP 988# endif 989 990# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 991 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 992# define _LIBCPP_HAS_NO_ATOMIC_HEADER 993# else 994# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 995# define _LIBCPP_ATOMIC_FLAG_TYPE bool 996# endif 997# ifdef _LIBCPP_FREESTANDING 998# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 999# endif 1000# endif 1001 1002# ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1003# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1004# endif 1005 1006# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1007# if defined(__clang__) && __has_attribute(acquire_capability) 1008// Work around the attribute handling in clang. When both __declspec and 1009// __attribute__ are present, the processing goes awry preventing the definition 1010// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1011// combining the two does work. 1012# if !defined(_MSC_VER) 1013# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1014# endif 1015# endif 1016# endif 1017 1018# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1019# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1020# else 1021# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1022# endif 1023 1024# if _LIBCPP_STD_VER > 17 1025# define _LIBCPP_CONSTINIT constinit 1026# elif __has_attribute(require_constant_initialization) 1027# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1028# else 1029# define _LIBCPP_CONSTINIT 1030# endif 1031 1032# if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1033# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1034# define _LIBCPP_DIAGNOSE_ERROR(...) __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1035# else 1036# define _LIBCPP_DIAGNOSE_WARNING(...) 1037# define _LIBCPP_DIAGNOSE_ERROR(...) 1038# endif 1039 1040// Use a function like macro to imply that it must be followed by a semicolon 1041# if __has_cpp_attribute(fallthrough) 1042# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1043# elif __has_attribute(__fallthrough__) 1044# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1045# else 1046# define _LIBCPP_FALLTHROUGH() ((void)0) 1047# endif 1048 1049# if __has_attribute(__nodebug__) 1050# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1051# else 1052# define _LIBCPP_NODEBUG 1053# endif 1054 1055# if __has_attribute(__standalone_debug__) 1056# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1057# else 1058# define _LIBCPP_STANDALONE_DEBUG 1059# endif 1060 1061# if __has_attribute(__preferred_name__) 1062# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1063# else 1064# define _LIBCPP_PREFERRED_NAME(x) 1065# endif 1066 1067// We often repeat things just for handling wide characters in the library. 1068// When wide characters are disabled, it can be useful to have a quick way of 1069// disabling it without having to resort to #if-#endif, which has a larger 1070// impact on readability. 1071# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1072# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1073# else 1074# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1075# endif 1076 1077# if defined(_LIBCPP_ABI_MICROSOFT) && (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1078# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1079# else 1080# define _LIBCPP_DECLSPEC_EMPTY_BASES 1081# endif 1082 1083# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1084# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1085# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1086# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1087# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1088# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1089# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1090 1091# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1092# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1093# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION 1094# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1095# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1096# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1097# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1098# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1099 1100# if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1101# define _LIBCPP_HAS_NO_CXX20_COROUTINES 1102# endif 1103 1104# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") 1105# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") 1106 1107# ifndef _LIBCPP_NO_AUTO_LINK 1108# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1109# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1110# pragma comment(lib, "c++.lib") 1111# else 1112# pragma comment(lib, "libc++.lib") 1113# endif 1114# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1115# endif // _LIBCPP_NO_AUTO_LINK 1116 1117// Configures the fopen close-on-exec mode character, if any. This string will 1118// be appended to any mode string used by fstream for fopen/fdopen. 1119// 1120// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1121// do. 1122# if defined(__BIONIC__) 1123# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1124# else 1125# define _LIBCPP_FOPEN_CLOEXEC_MODE 1126# endif 1127 1128// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1129// of functions used in cstdio may not be available for low API levels when 1130// using 64-bit file offsets on LP32. 1131# if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1132# define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1133# endif 1134 1135# if __has_attribute(init_priority) 1136// TODO: Remove this once we drop support for building libc++ with old Clangs 1137# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1138 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1139# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1140# else 1141# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1142# endif 1143# else 1144# define _LIBCPP_INIT_PRIORITY_MAX 1145# endif 1146 1147# if defined(__GNUC__) || defined(__clang__) 1148// The attribute uses 1-based indices for ordinary and static member functions. 1149// The attribute uses 2-based indices for non-static member functions. 1150# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1151 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1152# else 1153# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1154# endif 1155 1156# if __has_cpp_attribute(msvc::no_unique_address) 1157// MSVC implements [[no_unique_address]] as a silent no-op currently. 1158// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1159// However, MSVC implements [[msvc::no_unique_address]] which does what 1160// [[no_unique_address]] is supposed to do, in general. 1161 1162// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1163// [[msvc::no_unique_address]] though. If/when it does implement 1164// [[msvc::no_unique_address]], this should be preferred though. 1165# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1166# elif __has_cpp_attribute(no_unique_address) 1167# define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] 1168# else 1169# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1170// Note that this can be replaced by #error as soon as clang-cl 1171// implements msvc::no_unique_address, since there should be no C++20 1172// compiler that doesn't support one of the two attributes at that point. 1173// We generally don't want to use this macro outside of C++20-only code, 1174// because using it conditionally in one language version only would make 1175// the ABI inconsistent. 1176# endif 1177 1178# ifdef _LIBCPP_COMPILER_CLANG_BASED 1179# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1180# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1181# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1182# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1183# elif defined(_LIBCPP_COMPILER_GCC) 1184# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1185# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1186# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1187# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1188# else 1189# define _LIBCPP_DIAGNOSTIC_PUSH 1190# define _LIBCPP_DIAGNOSTIC_POP 1191# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1192# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1193# endif 1194 1195# if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) 1196# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") 1197# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") 1198# else 1199# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ 1200# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ 1201# endif 1202 1203# if __has_attribute(__packed__) 1204# define _LIBCPP_PACKED __attribute__((__packed__)) 1205# else 1206# define _LIBCPP_PACKED 1207# endif 1208 1209#endif // __cplusplus 1210 1211#endif // _LIBCPP___CONFIG 1212