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