1// -*- C++ -*- 2//===--------------------------- __config ---------------------------------===// 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#if defined(_MSC_VER) && !defined(__clang__) 14# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 16# endif 17#endif 18 19#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 20#pragma GCC system_header 21#endif 22 23#ifdef __cplusplus 24 25#ifdef __GNUC__ 26# define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__) 27// The _GNUC_VER_NEW macro better represents the new GCC versioning scheme 28// introduced in GCC 5.0. 29# define _GNUC_VER_NEW (_GNUC_VER * 10 + __GNUC_PATCHLEVEL__) 30#else 31# define _GNUC_VER 0 32# define _GNUC_VER_NEW 0 33#endif 34 35#define _LIBCPP_VERSION 12000 36 37#ifndef _LIBCPP_ABI_VERSION 38# define _LIBCPP_ABI_VERSION 1 39#endif 40 41#if __STDC_HOSTED__ == 0 42# define _LIBCPP_FREESTANDING 43#endif 44 45#ifndef _LIBCPP_STD_VER 46# if __cplusplus <= 201103L 47# define _LIBCPP_STD_VER 11 48# elif __cplusplus <= 201402L 49# define _LIBCPP_STD_VER 14 50# elif __cplusplus <= 201703L 51# define _LIBCPP_STD_VER 17 52# else 53# define _LIBCPP_STD_VER 18 // current year, or date of c++2a ratification 54# endif 55#endif // _LIBCPP_STD_VER 56 57#if defined(__ELF__) 58# define _LIBCPP_OBJECT_FORMAT_ELF 1 59#elif defined(__MACH__) 60# define _LIBCPP_OBJECT_FORMAT_MACHO 1 61#elif defined(_WIN32) 62# define _LIBCPP_OBJECT_FORMAT_COFF 1 63#elif defined(__wasm__) 64# define _LIBCPP_OBJECT_FORMAT_WASM 1 65#else 66# error Unknown object file format 67#endif 68 69#if defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2 70// Change short string representation so that string data starts at offset 0, 71// improving its alignment in some cases. 72# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 73// Fix deque iterator type in order to support incomplete types. 74# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 75// Fix undefined behavior in how std::list stores its linked nodes. 76# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 77// Fix undefined behavior in how __tree stores its end and parent nodes. 78# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 79// Fix undefined behavior in how __hash_table stores its pointer types. 80# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 81# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 82# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 83// Don't use a nullptr_t simulation type in C++03 instead using C++11 nullptr 84// provided under the alternate keyword __nullptr, which changes the mangling 85// of nullptr_t. This option is ABI incompatible with GCC in C++03 mode. 86# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR 87// Define the `pointer_safety` enum as a C++11 strongly typed enumeration 88// instead of as a class simulating an enum. If this option is enabled 89// `pointer_safety` and `get_pointer_safety()` will no longer be available 90// in C++03. 91# define _LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE 92// Define a key function for `bad_function_call` in the library, to centralize 93// its vtable and typeinfo to libc++ rather than having all other libraries 94// using that class define their own copies. 95# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 96// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 97# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 98// Use the smallest possible integer type to represent the index of the variant. 99// Previously libc++ used "unsigned int" exclusively. 100# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 101// Unstable attempt to provide a more optimized std::function 102# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 103// All the regex constants must be distinct and nonzero. 104# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 105// Re-worked external template instantiations for std::string with a focus on 106// performance and fast-path inlining. 107# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 108// Enable clang::trivial_abi on std::unique_ptr. 109# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 110// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 111# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 112#elif _LIBCPP_ABI_VERSION == 1 113# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 114// Enable compiling copies of now inline methods into the dylib to support 115// applications compiled against older libraries. This is unnecessary with 116// COFF dllexport semantics, since dllexport forces a non-inline definition 117// of inline functions to be emitted anyway. Our own non-inline copy would 118// conflict with the dllexport-emitted copy, so we disable it. 119# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 120# endif 121// Feature macros for disabling pre ABI v1 features. All of these options 122// are deprecated. 123# if defined(__FreeBSD__) 124# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 125# endif 126#endif 127 128#ifdef _LIBCPP_TRIVIAL_PAIR_COPY_CTOR 129#error "_LIBCPP_TRIVIAL_PAIR_COPY_CTOR" is no longer supported. \ 130 use _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR instead 131#endif 132 133#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y 134#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) 135 136#ifndef _LIBCPP_ABI_NAMESPACE 137# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION) 138#endif 139 140#if __cplusplus < 201103L 141#define _LIBCPP_CXX03_LANG 142#endif 143 144#ifndef __has_attribute 145#define __has_attribute(__x) 0 146#endif 147 148#ifndef __has_builtin 149#define __has_builtin(__x) 0 150#endif 151 152#ifndef __has_extension 153#define __has_extension(__x) 0 154#endif 155 156#ifndef __has_feature 157#define __has_feature(__x) 0 158#endif 159 160#ifndef __has_cpp_attribute 161#define __has_cpp_attribute(__x) 0 162#endif 163 164// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 165// the compiler and '1' otherwise. 166#ifndef __is_identifier 167#define __is_identifier(__x) 1 168#endif 169 170#ifndef __has_declspec_attribute 171#define __has_declspec_attribute(__x) 0 172#endif 173 174#define __has_keyword(__x) !(__is_identifier(__x)) 175 176#ifndef __has_include 177#define __has_include(...) 0 178#endif 179 180#if defined(__clang__) 181# define _LIBCPP_COMPILER_CLANG 182# ifndef __apple_build_version__ 183# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 184# endif 185#elif defined(__GNUC__) 186# define _LIBCPP_COMPILER_GCC 187#elif defined(_MSC_VER) 188# define _LIBCPP_COMPILER_MSVC 189#elif defined(__IBMCPP__) 190# define _LIBCPP_COMPILER_IBM 191#endif 192 193#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L 194#error "libc++ does not support using GCC with C++03. Please enable C++11" 195#endif 196 197// FIXME: ABI detection should be done via compiler builtin macros. This 198// is just a placeholder until Clang implements such macros. For now assume 199// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 200// and allow the user to explicitly specify the ABI to handle cases where this 201// heuristic falls short. 202#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 203# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 204#elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 205# define _LIBCPP_ABI_ITANIUM 206#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 207# define _LIBCPP_ABI_MICROSOFT 208#else 209# if defined(_WIN32) && defined(_MSC_VER) 210# define _LIBCPP_ABI_MICROSOFT 211# else 212# define _LIBCPP_ABI_ITANIUM 213# endif 214#endif 215 216#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 217# define _LIBCPP_ABI_VCRUNTIME 218#endif 219 220// Need to detect which libc we're using if we're on Linux. 221#if defined(__linux__) 222# include <features.h> 223# if defined(__GLIBC_PREREQ) 224# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 225# else 226# define _LIBCPP_GLIBC_PREREQ(a, b) 0 227# endif // defined(__GLIBC_PREREQ) 228#endif // defined(__linux__) 229 230#ifdef __LITTLE_ENDIAN__ 231# if __LITTLE_ENDIAN__ 232# define _LIBCPP_LITTLE_ENDIAN 233# endif // __LITTLE_ENDIAN__ 234#endif // __LITTLE_ENDIAN__ 235 236#ifdef __BIG_ENDIAN__ 237# if __BIG_ENDIAN__ 238# define _LIBCPP_BIG_ENDIAN 239# endif // __BIG_ENDIAN__ 240#endif // __BIG_ENDIAN__ 241 242#ifdef __BYTE_ORDER__ 243# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 244# define _LIBCPP_LITTLE_ENDIAN 245# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 246# define _LIBCPP_BIG_ENDIAN 247# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 248#endif // __BYTE_ORDER__ 249 250#ifdef __FreeBSD__ 251# include <sys/endian.h> 252# include <osreldate.h> 253# if _BYTE_ORDER == _LITTLE_ENDIAN 254# define _LIBCPP_LITTLE_ENDIAN 255# else // _BYTE_ORDER == _LITTLE_ENDIAN 256# define _LIBCPP_BIG_ENDIAN 257# endif // _BYTE_ORDER == _LITTLE_ENDIAN 258# ifndef __LONG_LONG_SUPPORTED 259# define _LIBCPP_HAS_NO_LONG_LONG 260# endif // __LONG_LONG_SUPPORTED 261#endif // __FreeBSD__ 262 263#ifdef __NetBSD__ 264# include <sys/endian.h> 265# if _BYTE_ORDER == _LITTLE_ENDIAN 266# define _LIBCPP_LITTLE_ENDIAN 267# else // _BYTE_ORDER == _LITTLE_ENDIAN 268# define _LIBCPP_BIG_ENDIAN 269# endif // _BYTE_ORDER == _LITTLE_ENDIAN 270#endif // __NetBSD__ 271 272#if defined(_WIN32) 273# define _LIBCPP_WIN32API 274# define _LIBCPP_LITTLE_ENDIAN 275# define _LIBCPP_SHORT_WCHAR 1 276// Both MinGW and native MSVC provide a "MSVC"-like environment 277# define _LIBCPP_MSVCRT_LIKE 278// If mingw not explicitly detected, assume using MS C runtime only if 279// a MS compatibility version is specified. 280# if defined(_MSC_VER) && !defined(__MINGW32__) 281# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 282# endif 283# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 284# define _LIBCPP_HAS_BITSCAN64 285# endif 286# define _LIBCPP_HAS_OPEN_WITH_WCHAR 287# if defined(_LIBCPP_MSVCRT) 288# define _LIBCPP_HAS_QUICK_EXIT 289# endif 290 291// Some CRT APIs are unavailable to store apps 292# if defined(WINAPI_FAMILY) 293# include <winapifamily.h> 294# if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \ 295 (!defined(WINAPI_PARTITION_SYSTEM) || \ 296 !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM)) 297# define _LIBCPP_WINDOWS_STORE_APP 298# endif 299# endif 300#endif // defined(_WIN32) 301 302#ifdef __sun__ 303# include <sys/isa_defs.h> 304# ifdef _LITTLE_ENDIAN 305# define _LIBCPP_LITTLE_ENDIAN 306# else 307# define _LIBCPP_BIG_ENDIAN 308# endif 309#endif // __sun__ 310 311#if defined(__CloudABI__) 312 // Certain architectures provide arc4random(). Prefer using 313 // arc4random() over /dev/{u,}random to make it possible to obtain 314 // random data even when using sandboxing mechanisms such as chroots, 315 // Capsicum, etc. 316# define _LIBCPP_USING_ARC4_RANDOM 317#elif defined(__Fuchsia__) || defined(__wasi__) 318# define _LIBCPP_USING_GETENTROPY 319#elif defined(__native_client__) 320 // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 321 // including accesses to the special files under /dev. C++11's 322 // std::random_device is instead exposed through a NaCl syscall. 323# define _LIBCPP_USING_NACL_RANDOM 324#elif defined(_LIBCPP_WIN32API) 325# define _LIBCPP_USING_WIN32_RANDOM 326#else 327# define _LIBCPP_USING_DEV_RANDOM 328#endif 329 330#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 331# include <endian.h> 332# if __BYTE_ORDER == __LITTLE_ENDIAN 333# define _LIBCPP_LITTLE_ENDIAN 334# elif __BYTE_ORDER == __BIG_ENDIAN 335# define _LIBCPP_BIG_ENDIAN 336# else // __BYTE_ORDER == __BIG_ENDIAN 337# error unable to determine endian 338# endif 339#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 340 341#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 342# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 343#else 344# define _LIBCPP_NO_CFI 345#endif 346 347#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L 348# if defined(__FreeBSD__) 349# define _LIBCPP_HAS_ALIGNED_ALLOC 350# define _LIBCPP_HAS_QUICK_EXIT 351# if __FreeBSD_version >= 1300064 || \ 352 (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000) 353# define _LIBCPP_HAS_TIMESPEC_GET 354# endif 355# elif defined(__BIONIC__) 356# if __ANDROID_API__ >= 21 357# define _LIBCPP_HAS_QUICK_EXIT 358# endif 359# if __ANDROID_API__ >= 28 360# define _LIBCPP_HAS_ALIGNED_ALLOC 361# endif 362# if __ANDROID_API__ >= 29 363# define _LIBCPP_HAS_TIMESPEC_GET 364# endif 365# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__) 366# define _LIBCPP_HAS_ALIGNED_ALLOC 367# define _LIBCPP_HAS_QUICK_EXIT 368# define _LIBCPP_HAS_TIMESPEC_GET 369# elif defined(__linux__) 370# if !defined(_LIBCPP_HAS_MUSL_LIBC) 371# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__) 372# define _LIBCPP_HAS_QUICK_EXIT 373# endif 374# if _LIBCPP_GLIBC_PREREQ(2, 17) 375# define _LIBCPP_HAS_ALIGNED_ALLOC 376# define _LIBCPP_HAS_TIMESPEC_GET 377# endif 378# else // defined(_LIBCPP_HAS_MUSL_LIBC) 379# define _LIBCPP_HAS_ALIGNED_ALLOC 380# define _LIBCPP_HAS_QUICK_EXIT 381# define _LIBCPP_HAS_TIMESPEC_GET 382# endif 383# elif defined(__APPLE__) 384 // timespec_get and aligned_alloc were introduced in macOS 10.15 and 385 // aligned releases 386# if (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500 || \ 387 __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000 || \ 388 __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000 || \ 389 __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000) 390# define _LIBCPP_HAS_ALIGNED_ALLOC 391# define _LIBCPP_HAS_TIMESPEC_GET 392# endif 393# endif // __APPLE__ 394#endif 395 396#ifndef _LIBCPP_CXX03_LANG 397# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 398#elif defined(_LIBCPP_COMPILER_CLANG) 399# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 400#else 401# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 402#endif 403 404#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 405 406#if defined(_LIBCPP_COMPILER_CLANG) 407 408#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT) 409# error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead 410#endif 411#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 412 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 413# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 414#endif 415 416#if __has_feature(cxx_alignas) 417# define _ALIGNAS_TYPE(x) alignas(x) 418# define _ALIGNAS(x) alignas(x) 419#else 420# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 421# define _ALIGNAS(x) __attribute__((__aligned__(x))) 422#endif 423 424#if __cplusplus < 201103L 425typedef __char16_t char16_t; 426typedef __char32_t char32_t; 427#endif 428 429#if !__has_feature(cxx_exceptions) 430# define _LIBCPP_NO_EXCEPTIONS 431#endif 432 433#if !(__has_feature(cxx_strong_enums)) 434#define _LIBCPP_HAS_NO_STRONG_ENUMS 435#endif 436 437#if __has_feature(cxx_attributes) 438# define _LIBCPP_NORETURN [[noreturn]] 439#else 440# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 441#endif 442 443#if !(__has_feature(cxx_lambdas)) 444#define _LIBCPP_HAS_NO_LAMBDAS 445#endif 446 447#if !(__has_feature(cxx_nullptr)) 448# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR) 449# define nullptr __nullptr 450# else 451# define _LIBCPP_HAS_NO_NULLPTR 452# endif 453#endif 454 455#if !(__has_feature(cxx_auto_type)) 456#define _LIBCPP_HAS_NO_AUTO_TYPE 457#endif 458 459// Objective-C++ features (opt-in) 460#if __has_feature(objc_arc) 461#define _LIBCPP_HAS_OBJC_ARC 462#endif 463 464#if __has_feature(objc_arc_weak) 465#define _LIBCPP_HAS_OBJC_ARC_WEAK 466#endif 467 468#if __has_extension(blocks) 469# define _LIBCPP_HAS_EXTENSION_BLOCKS 470#endif 471 472#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 473# define _LIBCPP_HAS_BLOCKS_RUNTIME 474#endif 475 476#if !(__has_feature(cxx_relaxed_constexpr)) 477#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR 478#endif 479 480#if !(__has_feature(cxx_variable_templates)) 481#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 482#endif 483 484#if !(__has_feature(cxx_noexcept)) 485#define _LIBCPP_HAS_NO_NOEXCEPT 486#endif 487 488#if !defined(_LIBCPP_HAS_NO_ASAN) && !__has_feature(address_sanitizer) 489#define _LIBCPP_HAS_NO_ASAN 490#endif 491 492// Allow for build-time disabling of unsigned integer sanitization 493#if !defined(_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK) && __has_attribute(no_sanitize) 494#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 495#endif 496 497#if __has_builtin(__builtin_launder) 498#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER 499#endif 500 501#if __has_builtin(__builtin_constant_p) 502#define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P 503#endif 504 505#if !__is_identifier(__has_unique_object_representations) 506#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS 507#endif 508 509#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 510 511// Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1 512#if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 800) || \ 513 (defined(__apple_build_version__) && __apple_build_version__ < 10010000) 514#define _LIBCPP_HAS_NO_CXX20_CHRONO_LITERALS 515#endif 516 517#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 518 519#elif defined(_LIBCPP_COMPILER_GCC) 520 521#define _ALIGNAS(x) __attribute__((__aligned__(x))) 522#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 523 524#define _LIBCPP_NORETURN __attribute__((noreturn)) 525 526#if !__EXCEPTIONS 527# define _LIBCPP_NO_EXCEPTIONS 528#endif 529 530// Determine if GCC supports relaxed constexpr 531#if !defined(__cpp_constexpr) || __cpp_constexpr < 201304L 532#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR 533#endif 534 535// GCC 5 supports variable templates 536#if !defined(__cpp_variable_templates) || __cpp_variable_templates < 201304L 537#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 538#endif 539 540#if !defined(_LIBCPP_HAS_NO_ASAN) && !defined(__SANITIZE_ADDRESS__) 541#define _LIBCPP_HAS_NO_ASAN 542#endif 543 544#if _GNUC_VER >= 700 545#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER 546#define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P 547#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS 548#endif 549 550#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 551 552#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 553 554#elif defined(_LIBCPP_COMPILER_MSVC) 555 556#define _LIBCPP_TOSTRING2(x) #x 557#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 558#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 559 560#if _MSC_VER < 1900 561#error "MSVC versions prior to Visual Studio 2015 are not supported" 562#endif 563 564#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR 565#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 566#define __alignof__ __alignof 567#define _LIBCPP_NORETURN __declspec(noreturn) 568#define _ALIGNAS(x) __declspec(align(x)) 569#define _ALIGNAS_TYPE(x) alignas(x) 570 571#define _LIBCPP_WEAK 572 573#define _LIBCPP_HAS_NO_ASAN 574 575#define _LIBCPP_ALWAYS_INLINE __forceinline 576 577#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 578 579#define _LIBCPP_DISABLE_EXTENSION_WARNING 580 581#elif defined(_LIBCPP_COMPILER_IBM) 582 583#define _ALIGNAS(x) __attribute__((__aligned__(x))) 584#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 585#define _ATTRIBUTE(x) __attribute__((x)) 586#define _LIBCPP_NORETURN __attribute__((noreturn)) 587 588#define _LIBCPP_HAS_NO_UNICODE_CHARS 589#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 590 591#if defined(_AIX) 592#define __MULTILOCALE_API 593#endif 594 595#define _LIBCPP_HAS_NO_ASAN 596 597#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 598 599#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 600 601#define _LIBCPP_DISABLE_EXTENSION_WARNING 602 603#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 604 605#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 606 607#ifdef _DLL 608# define _LIBCPP_CRT_FUNC __declspec(dllimport) 609#else 610# define _LIBCPP_CRT_FUNC 611#endif 612 613#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 614# define _LIBCPP_DLL_VIS 615# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 616# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 617# define _LIBCPP_OVERRIDABLE_FUNC_VIS 618# define _LIBCPP_EXPORTED_FROM_ABI 619#elif defined(_LIBCPP_BUILDING_LIBRARY) 620# define _LIBCPP_DLL_VIS __declspec(dllexport) 621# if defined(__MINGW32__) 622# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 623# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 624# else 625# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 626# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 627# endif 628# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 629# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 630#else 631# define _LIBCPP_DLL_VIS __declspec(dllimport) 632# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 633# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 634# define _LIBCPP_OVERRIDABLE_FUNC_VIS 635# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 636#endif 637 638#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 639#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 640#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 641#define _LIBCPP_HIDDEN 642#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 643#define _LIBCPP_TEMPLATE_VIS 644#define _LIBCPP_ENUM_VIS 645 646#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 647 648#ifndef _LIBCPP_HIDDEN 649# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 650# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 651# else 652# define _LIBCPP_HIDDEN 653# endif 654#endif 655 656#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 657# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 658// The inline should be removed once PR32114 is resolved 659# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 660# else 661# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 662# endif 663#endif 664 665#ifndef _LIBCPP_FUNC_VIS 666# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 667# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 668# else 669# define _LIBCPP_FUNC_VIS 670# endif 671#endif 672 673#ifndef _LIBCPP_TYPE_VIS 674# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 675# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 676# else 677# define _LIBCPP_TYPE_VIS 678# endif 679#endif 680 681#ifndef _LIBCPP_TEMPLATE_VIS 682# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 683# if __has_attribute(__type_visibility__) 684# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 685# else 686# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 687# endif 688# else 689# define _LIBCPP_TEMPLATE_VIS 690# endif 691#endif 692 693#ifndef _LIBCPP_EXPORTED_FROM_ABI 694# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 695# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 696# else 697# define _LIBCPP_EXPORTED_FROM_ABI 698# endif 699#endif 700 701#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 702#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 703#endif 704 705#ifndef _LIBCPP_EXCEPTION_ABI 706# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 707# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 708# else 709# define _LIBCPP_EXCEPTION_ABI 710# endif 711#endif 712 713#ifndef _LIBCPP_ENUM_VIS 714# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 715# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 716# else 717# define _LIBCPP_ENUM_VIS 718# endif 719#endif 720 721#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 722# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 723# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 724# else 725# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 726# endif 727#endif 728 729#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 730#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 731#endif 732 733#if __has_attribute(internal_linkage) 734# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 735#else 736# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 737#endif 738 739#if __has_attribute(exclude_from_explicit_instantiation) 740# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 741#else 742 // Try to approximate the effect of exclude_from_explicit_instantiation 743 // (which is that entities are not assumed to be provided by explicit 744 // template instantiations in the dylib) by always inlining those entities. 745# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 746#endif 747 748#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 749# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 750# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 751# else 752# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 753# endif 754#endif 755 756#ifndef _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION 757# ifdef _LIBCPP_OBJECT_FORMAT_COFF // Windows binaries can't merge typeinfos. 758# define _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION 2 759# else 760 // TODO: This isn't strictly correct on ELF platforms due to llvm.org/PR37398 761 // And we should consider defaulting to OFF. 762# define _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION 1 763# endif 764#endif 765 766#ifndef _LIBCPP_HIDE_FROM_ABI 767# if _LIBCPP_HIDE_FROM_ABI_PER_TU 768# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 769# else 770# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 771# endif 772#endif 773 774#ifdef _LIBCPP_BUILDING_LIBRARY 775# if _LIBCPP_ABI_VERSION > 1 776# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 777# else 778# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 779# endif 780#else 781# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 782#endif 783 784// Just so we can migrate to the new macros gradually. 785#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 786 787// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 788#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 789#define _LIBCPP_END_NAMESPACE_STD } } 790#define _VSTD std::_LIBCPP_ABI_NAMESPACE 791_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 792 793#if _LIBCPP_STD_VER >= 17 794#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 795 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 796#else 797#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 798 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 799#endif 800 801#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 802 _LIBCPP_END_NAMESPACE_STD } } 803 804#define _VSTD_FS _VSTD::__fs::filesystem 805 806#ifndef _LIBCPP_PREFERRED_OVERLOAD 807# if __has_attribute(__enable_if__) 808# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 809# endif 810#endif 811 812#ifndef _LIBCPP_HAS_NO_NOEXCEPT 813# define _NOEXCEPT noexcept 814# define _NOEXCEPT_(x) noexcept(x) 815#else 816# define _NOEXCEPT throw() 817# define _NOEXCEPT_(x) 818#endif 819 820#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 821typedef unsigned short char16_t; 822typedef unsigned int char32_t; 823#endif // _LIBCPP_HAS_NO_UNICODE_CHARS 824 825#ifndef __SIZEOF_INT128__ 826#define _LIBCPP_HAS_NO_INT128 827#endif 828 829#ifdef _LIBCPP_CXX03_LANG 830# define static_assert(...) _Static_assert(__VA_ARGS__) 831# define decltype(...) __decltype(__VA_ARGS__) 832#endif // _LIBCPP_CXX03_LANG 833 834#ifdef _LIBCPP_CXX03_LANG 835# define _LIBCPP_CONSTEXPR 836#else 837# define _LIBCPP_CONSTEXPR constexpr 838#endif 839 840#ifndef __cpp_consteval 841# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 842#else 843# define _LIBCPP_CONSTEVAL consteval 844#endif 845 846#ifdef _LIBCPP_CXX03_LANG 847# define _LIBCPP_DEFAULT {} 848#else 849# define _LIBCPP_DEFAULT = default; 850#endif 851 852#ifdef _LIBCPP_CXX03_LANG 853# define _LIBCPP_EQUAL_DELETE 854#else 855# define _LIBCPP_EQUAL_DELETE = delete 856#endif 857 858#ifdef __GNUC__ 859# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 860#else 861# define _LIBCPP_NOALIAS 862#endif 863 864#if __has_feature(cxx_explicit_conversions) || defined(__IBMCPP__) || \ 865 (!defined(_LIBCPP_CXX03_LANG) && defined(__GNUC__)) // All supported GCC versions 866# define _LIBCPP_EXPLICIT explicit 867#else 868# define _LIBCPP_EXPLICIT 869#endif 870 871#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS 872# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 873# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 874 __lx __v_; \ 875 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 876 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 877 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 878 }; 879#else // _LIBCPP_HAS_NO_STRONG_ENUMS 880# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 881# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 882#endif // _LIBCPP_HAS_NO_STRONG_ENUMS 883 884// _LIBCPP_DEBUG potential values: 885// - undefined: No assertions. This is the default. 886// - 0: Basic assertions 887// - 1: Basic assertions + iterator validity checks. 888#if !defined(_LIBCPP_DEBUG) 889# define _LIBCPP_DEBUG_LEVEL 0 890#elif _LIBCPP_DEBUG == 0 891# define _LIBCPP_DEBUG_LEVEL 1 892#elif _LIBCPP_DEBUG == 1 893# define _LIBCPP_DEBUG_LEVEL 2 894#else 895# error Supported values for _LIBCPP_DEBUG are 0 and 1 896#endif 897 898// _LIBCPP_DEBUG_LEVEL is always defined to one of [0, 1, 2] at this point 899#if _LIBCPP_DEBUG_LEVEL >= 1 900# define _LIBCPP_DISABLE_EXTERN_TEMPLATE 901#endif 902 903#ifdef _LIBCPP_DISABLE_EXTERN_TEMPLATE 904#define _LIBCPP_EXTERN_TEMPLATE(...) 905#endif 906 907#ifndef _LIBCPP_EXTERN_TEMPLATE 908#define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 909#endif 910 911#ifndef _LIBCPP_EXTERN_TEMPLATE_DEFINE 912#define _LIBCPP_EXTERN_TEMPLATE_DEFINE(...) template __VA_ARGS__; 913#endif 914 915#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 916 defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__) 917#define _LIBCPP_LOCALE__L_EXTENSIONS 1 918#endif 919 920#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) 921// Most unix variants have catopen. These are the specific ones that don't. 922# if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) 923# define _LIBCPP_HAS_CATOPEN 1 924# endif 925#endif 926 927#ifdef __FreeBSD__ 928#define _DECLARE_C99_LDBL_MATH 1 929#endif 930 931// If we are getting operator new from the MSVC CRT, then allocation overloads 932// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 933#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 934# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 935#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 936 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 937 // have it unless the language feature test macro is defined. 938# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 939#endif 940 941#if defined(__APPLE__) 942# if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \ 943 defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) 944# define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 945# endif 946#endif // defined(__APPLE__) 947 948#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \ 949 (defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 950 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)) 951# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 952#endif 953 954#if defined(__APPLE__) || defined(__FreeBSD__) 955#define _LIBCPP_HAS_DEFAULTRUNELOCALE 956#endif 957 958#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 959#define _LIBCPP_WCTYPE_IS_MASK 960#endif 961 962#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 963#define _LIBCPP_NO_HAS_CHAR8_T 964#endif 965 966// Deprecation macros. 967// 968// Deprecations warnings are always enabled, except when users explicitly opt-out 969// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 970#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 971# if __has_attribute(deprecated) 972# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 973# elif _LIBCPP_STD_VER > 11 974# define _LIBCPP_DEPRECATED [[deprecated]] 975# else 976# define _LIBCPP_DEPRECATED 977# endif 978#else 979# define _LIBCPP_DEPRECATED 980#endif 981 982#if !defined(_LIBCPP_CXX03_LANG) 983# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 984#else 985# define _LIBCPP_DEPRECATED_IN_CXX11 986#endif 987 988#if _LIBCPP_STD_VER >= 14 989# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 990#else 991# define _LIBCPP_DEPRECATED_IN_CXX14 992#endif 993 994#if _LIBCPP_STD_VER >= 17 995# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 996#else 997# define _LIBCPP_DEPRECATED_IN_CXX17 998#endif 999 1000// Macros to enter and leave a state where deprecation warnings are suppressed. 1001#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) && \ 1002 (defined(_LIBCPP_COMPILER_CLANG) || defined(_LIBCPP_COMPILER_GCC)) 1003# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 1004 _Pragma("GCC diagnostic push") \ 1005 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") 1006# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 1007 _Pragma("GCC diagnostic pop") 1008#endif 1009#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) 1010# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1011# define _LIBCPP_SUPPRESS_DEPRECATED_POP 1012#endif 1013 1014#if _LIBCPP_STD_VER <= 11 1015# define _LIBCPP_EXPLICIT_AFTER_CXX11 1016#else 1017# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 1018#endif 1019 1020#if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1021# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 1022#else 1023# define _LIBCPP_CONSTEXPR_AFTER_CXX11 1024#endif 1025 1026#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1027# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 1028#else 1029# define _LIBCPP_CONSTEXPR_AFTER_CXX14 1030#endif 1031 1032#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1033# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 1034#else 1035# define _LIBCPP_CONSTEXPR_AFTER_CXX17 1036#endif 1037 1038#if _LIBCPP_STD_VER > 17 && \ 1039 !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) && \ 1040 !defined(_LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED) 1041# define _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED constexpr 1042#else 1043# define _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED 1044#endif 1045 1046// The _LIBCPP_NODISCARD_ATTRIBUTE should only be used to define other 1047// NODISCARD macros to the correct attribute. 1048#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 1049# define _LIBCPP_NODISCARD_ATTRIBUTE [[nodiscard]] 1050#elif defined(_LIBCPP_COMPILER_CLANG) && !defined(_LIBCPP_CXX03_LANG) 1051# define _LIBCPP_NODISCARD_ATTRIBUTE [[clang::warn_unused_result]] 1052#else 1053// We can't use GCC's [[gnu::warn_unused_result]] and 1054// __attribute__((warn_unused_result)), because GCC does not silence them via 1055// (void) cast. 1056# define _LIBCPP_NODISCARD_ATTRIBUTE 1057#endif 1058 1059// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1060// specified as such as an extension. 1061#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1062# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD_ATTRIBUTE 1063#else 1064# define _LIBCPP_NODISCARD_EXT 1065#endif 1066 1067#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 1068 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 1069# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD_ATTRIBUTE 1070#else 1071# define _LIBCPP_NODISCARD_AFTER_CXX17 1072#endif 1073 1074#if _LIBCPP_STD_VER > 14 && defined(__cpp_inline_variables) && (__cpp_inline_variables >= 201606L) 1075# define _LIBCPP_INLINE_VAR inline 1076#else 1077# define _LIBCPP_INLINE_VAR 1078#endif 1079 1080#ifndef _LIBCPP_CONSTEXPR_IF_NODEBUG 1081#if defined(_LIBCPP_DEBUG) || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1082#define _LIBCPP_CONSTEXPR_IF_NODEBUG 1083#else 1084#define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr 1085#endif 1086#endif 1087 1088#if __has_attribute(no_destroy) 1089# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1090#else 1091# define _LIBCPP_NO_DESTROY 1092#endif 1093 1094#ifndef _LIBCPP_HAS_NO_ASAN 1095_LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container( 1096 const void *, const void *, const void *, const void *); 1097#endif 1098 1099// Try to find out if RTTI is disabled. 1100#if defined(_LIBCPP_COMPILER_CLANG) && !__has_feature(cxx_rtti) 1101# define _LIBCPP_NO_RTTI 1102#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1103# define _LIBCPP_NO_RTTI 1104#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1105# define _LIBCPP_NO_RTTI 1106#endif 1107 1108#ifndef _LIBCPP_WEAK 1109#define _LIBCPP_WEAK __attribute__((__weak__)) 1110#endif 1111 1112// Thread API 1113#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1114 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1115 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1116 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1117# if defined(__FreeBSD__) || \ 1118 defined(__wasi__) || \ 1119 defined(__NetBSD__) || \ 1120 defined(__linux__) || \ 1121 defined(__GNU__) || \ 1122 defined(__APPLE__) || \ 1123 defined(__CloudABI__) || \ 1124 defined(__sun__) || \ 1125 (defined(__MINGW32__) && __has_include(<pthread.h>)) 1126# define _LIBCPP_HAS_THREAD_API_PTHREAD 1127# elif defined(__Fuchsia__) 1128 // TODO(44575): Switch to C11 thread API when possible. 1129# define _LIBCPP_HAS_THREAD_API_PTHREAD 1130# elif defined(_LIBCPP_WIN32API) 1131# define _LIBCPP_HAS_THREAD_API_WIN32 1132# else 1133# error "No thread API" 1134# endif // _LIBCPP_HAS_THREAD_API 1135#endif // _LIBCPP_HAS_NO_THREADS 1136 1137#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1138#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1139#define _LIBCPP_HAS_COND_CLOCKWAIT 1140#elif defined(_LIBCPP_GLIBC_PREREQ) 1141#if _LIBCPP_GLIBC_PREREQ(2, 30) 1142#define _LIBCPP_HAS_COND_CLOCKWAIT 1143#endif 1144#endif 1145#endif 1146 1147#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1148#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1149 _LIBCPP_HAS_NO_THREADS is not defined. 1150#endif 1151 1152#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1153#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1154 _LIBCPP_HAS_NO_THREADS is defined. 1155#endif 1156 1157#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1158#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1159 _LIBCPP_HAS_NO_THREADS is defined. 1160#endif 1161 1162#if defined(__STDCPP_THREADS__) && defined(_LIBCPP_HAS_NO_THREADS) 1163#error _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set. 1164#endif 1165 1166#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1167#define __STDCPP_THREADS__ 1 1168#endif 1169 1170// The glibc and Bionic implementation of pthreads implements 1171// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1172// mutexes have no destroy mechanism. 1173// 1174// This optimization can't be performed on Apple platforms, where 1175// pthread_mutex_destroy can allow the kernel to release resources. 1176// See https://llvm.org/D64298 for details. 1177// 1178// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1179// respective stakeholders. 1180#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1181 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1182 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1183# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1184#endif 1185 1186// Destroying a condvar is a nop on Windows. 1187// 1188// This optimization can't be performed on Apple platforms, where 1189// pthread_cond_destroy can allow the kernel to release resources. 1190// See https://llvm.org/D64298 for details. 1191// 1192// TODO(EricWF): This is potentially true for some pthread implementations 1193// as well. 1194#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1195 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1196# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1197#endif 1198 1199// Systems that use capability-based security (FreeBSD with Capsicum, 1200// Nuxi CloudABI) may only provide local filesystem access (using *at()). 1201// Functions like open(), rename(), unlink() and stat() should not be 1202// used, as they attempt to access the global filesystem namespace. 1203#ifdef __CloudABI__ 1204#define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE 1205#endif 1206 1207// CloudABI is intended for running networked services. Processes do not 1208// have standard input and output channels. 1209#ifdef __CloudABI__ 1210#define _LIBCPP_HAS_NO_STDIN 1211#define _LIBCPP_HAS_NO_STDOUT 1212#endif 1213 1214// Some systems do not provide gets() in their C library, for security reasons. 1215#ifndef _LIBCPP_C_HAS_NO_GETS 1216# if defined(_LIBCPP_MSVCRT) || \ 1217 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) 1218# define _LIBCPP_C_HAS_NO_GETS 1219# endif 1220#endif 1221 1222#if defined(__BIONIC__) || defined(__CloudABI__) || \ 1223 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) 1224#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1225#endif 1226 1227// Thread-unsafe functions such as strtok() and localtime() 1228// are not available. 1229#ifdef __CloudABI__ 1230#define _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS 1231#endif 1232 1233#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1234# define _LIBCPP_HAS_C_ATOMIC_IMP 1235#elif defined(_LIBCPP_COMPILER_GCC) 1236# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1237#endif 1238 1239#if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1240 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1241 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)) \ 1242 || defined(_LIBCPP_HAS_NO_THREADS) 1243# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1244#else 1245# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1246# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1247# endif 1248# ifdef _LIBCPP_FREESTANDING 1249# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1250# endif 1251#endif 1252 1253#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1254#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1255#endif 1256 1257#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1258# if defined(__clang__) && __has_attribute(acquire_capability) 1259// Work around the attribute handling in clang. When both __declspec and 1260// __attribute__ are present, the processing goes awry preventing the definition 1261// of the types. 1262# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1263# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1264# endif 1265# endif 1266#endif 1267 1268#ifndef _LIBCPP_THREAD_SAFETY_ANNOTATION 1269# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1270# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1271# else 1272# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1273# endif 1274#endif // _LIBCPP_THREAD_SAFETY_ANNOTATION 1275 1276#if __has_attribute(require_constant_initialization) 1277# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__)) 1278#else 1279# define _LIBCPP_SAFE_STATIC 1280#endif 1281 1282#if !__has_builtin(__builtin_addressof) && _GNUC_VER < 700 1283#define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF 1284#endif 1285 1286#if !__has_builtin(__builtin_is_constant_evaluated) && _GNUC_VER < 900 1287#define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED 1288#endif 1289 1290#if !defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 1291# if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION) 1292# define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS 1293# endif 1294#endif 1295 1296#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1297# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1298 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1299# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1300 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1301#else 1302# define _LIBCPP_DIAGNOSE_WARNING(...) 1303# define _LIBCPP_DIAGNOSE_ERROR(...) 1304#endif 1305 1306// Use a function like macro to imply that it must be followed by a semicolon 1307#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 1308# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1309#elif __has_cpp_attribute(clang::fallthrough) 1310# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1311#elif __has_attribute(fallthrough) || _GNUC_VER >= 700 1312# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1313#else 1314# define _LIBCPP_FALLTHROUGH() ((void)0) 1315#endif 1316 1317#if __has_attribute(__nodebug__) 1318#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1319#else 1320#define _LIBCPP_NODEBUG 1321#endif 1322 1323#ifndef _LIBCPP_NODEBUG_TYPE 1324#if __has_attribute(__nodebug__) && \ 1325 (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 900) 1326#define _LIBCPP_NODEBUG_TYPE __attribute__((nodebug)) 1327#else 1328#define _LIBCPP_NODEBUG_TYPE 1329#endif 1330#endif // !defined(_LIBCPP_NODEBUG_TYPE) 1331 1332#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1333 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1334# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1335#else 1336# define _LIBCPP_DECLSPEC_EMPTY_BASES 1337#endif 1338 1339#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1340#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1341#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1342#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1343#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1344#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1345 1346#if !defined(__cpp_deduction_guides) || __cpp_deduction_guides < 201611 1347#define _LIBCPP_HAS_NO_DEDUCTION_GUIDES 1348#endif 1349 1350#if !__has_keyword(__is_aggregate) && (_GNUC_VER_NEW < 7001) 1351#define _LIBCPP_HAS_NO_IS_AGGREGATE 1352#endif 1353 1354#if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L 1355#define _LIBCPP_HAS_NO_COROUTINES 1356#endif 1357 1358#if !defined(__cpp_impl_three_way_comparison) || __cpp_impl_three_way_comparison < 201907L 1359#define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR 1360#endif 1361 1362#if defined(_LIBCPP_COMPILER_IBM) 1363#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1364#endif 1365 1366#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1367# define _LIBCPP_PUSH_MACROS 1368# define _LIBCPP_POP_MACROS 1369#else 1370 // Don't warn about macro conflicts when we can restore them at the 1371 // end of the header. 1372# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1373# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1374# endif 1375# if defined(_LIBCPP_COMPILER_MSVC) 1376# define _LIBCPP_PUSH_MACROS \ 1377 __pragma(push_macro("min")) \ 1378 __pragma(push_macro("max")) 1379# define _LIBCPP_POP_MACROS \ 1380 __pragma(pop_macro("min")) \ 1381 __pragma(pop_macro("max")) 1382# else 1383# define _LIBCPP_PUSH_MACROS \ 1384 _Pragma("push_macro(\"min\")") \ 1385 _Pragma("push_macro(\"max\")") 1386# define _LIBCPP_POP_MACROS \ 1387 _Pragma("pop_macro(\"min\")") \ 1388 _Pragma("pop_macro(\"max\")") 1389# endif 1390#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1391 1392#ifndef _LIBCPP_NO_AUTO_LINK 1393# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1394# if defined(_DLL) 1395# pragma comment(lib, "c++.lib") 1396# else 1397# pragma comment(lib, "libc++.lib") 1398# endif 1399# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1400#endif // _LIBCPP_NO_AUTO_LINK 1401 1402#define _LIBCPP_UNUSED_VAR(x) ((void)(x)) 1403 1404// Configures the fopen close-on-exec mode character, if any. This string will 1405// be appended to any mode string used by fstream for fopen/fdopen. 1406// 1407// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1408// do. 1409#if defined(__BIONIC__) 1410# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1411#else 1412# define _LIBCPP_FOPEN_CLOEXEC_MODE 1413#endif 1414 1415#ifdef _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P 1416#define _LIBCPP_BUILTIN_CONSTANT_P(x) __builtin_constant_p(x) 1417#else 1418#define _LIBCPP_BUILTIN_CONSTANT_P(x) false 1419#endif 1420 1421// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1422// of functions used in cstdio may not be available for low API levels when 1423// using 64-bit file offsets on LP32. 1424#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1425#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1426#endif 1427 1428#endif // __cplusplus 1429 1430#endif // _LIBCPP_CONFIG 1431