// -*- C++ -*- //===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef _LIBCPP___CONFIG #define _LIBCPP___CONFIG #include <__config_site> #include <__configuration/abi.h> #include <__configuration/availability.h> #include <__configuration/compiler.h> #include <__configuration/platform.h> #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER # pragma GCC system_header #endif #ifdef __cplusplus // The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html // _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM. // Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is // defined to XXYYZZ. #define _LIBCPP_VERSION … #define _LIBCPP_CONCAT_IMPL(_X, _Y) … #define _LIBCPP_CONCAT(_X, _Y) … # if __STDC_HOSTED__ == 0 #define _LIBCPP_FREESTANDING # endif // HARDENING { // This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes) // equivalent to setting the extensive mode. This is deprecated and will be removed in LLVM 20. # ifdef _LIBCPP_ENABLE_ASSERTIONS # warning "_LIBCPP_ENABLE_ASSERTIONS is deprecated, please use _LIBCPP_HARDENING_MODE instead" # if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1 # error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1" # endif # if _LIBCPP_ENABLE_ASSERTIONS #define _LIBCPP_HARDENING_MODE … # endif # endif // The library provides the macro `_LIBCPP_HARDENING_MODE` which can be set to one of the following values: // // - `_LIBCPP_HARDENING_MODE_NONE`; // - `_LIBCPP_HARDENING_MODE_FAST`; // - `_LIBCPP_HARDENING_MODE_EXTENSIVE`; // - `_LIBCPP_HARDENING_MODE_DEBUG`. // // These values have the following effects: // // - `_LIBCPP_HARDENING_MODE_NONE` -- sets the hardening mode to "none" which disables all runtime hardening checks; // // - `_LIBCPP_HARDENING_MODE_FAST` -- sets that hardening mode to "fast". The fast mode enables security-critical checks // that can be done with relatively little runtime overhead in constant time; // // - `_LIBCPP_HARDENING_MODE_EXTENSIVE` -- sets the hardening mode to "extensive". The extensive mode is a superset of // the fast mode that additionally enables checks that are relatively cheap and prevent common types of logic errors // but are not necessarily security-critical; // // - `_LIBCPP_HARDENING_MODE_DEBUG` -- sets the hardening mode to "debug". The debug mode is a superset of the extensive // mode and enables all checks available in the library, including internal assertions. Checks that are part of the // debug mode can be very expensive and thus the debug mode is intended to be used for testing, not in production. // Inside the library, assertions are categorized so they can be cherry-picked based on the chosen hardening mode. These // macros are only for internal use -- users should only pick one of the high-level hardening modes described above. // // - `_LIBCPP_ASSERT_VALID_INPUT_RANGE` -- checks that ranges (whether expressed as an iterator pair, an iterator and // a sentinel, an iterator and a count, or a `std::range`) given as input to library functions are valid: // - the sentinel is reachable from the begin iterator; // - TODO(hardening): both iterators refer to the same container. // // - `_LIBCPP_ASSERT_VALID_ELEMENT_ACCESS` -- checks that any attempts to access a container element, whether through // the container object or through an iterator, are valid and do not attempt to go out of bounds or otherwise access // a non-existent element. For iterator checks to work, bounded iterators must be enabled in the ABI. Types like // `optional` and `function` are considered one-element containers for the purposes of this check. // // - `_LIBCPP_ASSERT_NON_NULL` -- checks that the pointer being dereferenced is not null. On most modern platforms zero // address does not refer to an actual location in memory, so a null pointer dereference would not compromize the // memory security of a program (however, it is still undefined behavior that can result in strange errors due to // compiler optimizations). // // - `_LIBCPP_ASSERT_NON_OVERLAPPING_RANGES` -- for functions that take several ranges as arguments, checks that the // given ranges do not overlap. // // - `_LIBCPP_ASSERT_VALID_DEALLOCATION` -- checks that an attempt to deallocate memory is valid (e.g. the given object // was allocated by the given allocator). Violating this category typically results in a memory leak. // // - `_LIBCPP_ASSERT_VALID_EXTERNAL_API_CALL` -- checks that a call to an external API doesn't fail in // an unexpected manner. This includes triggering documented cases of undefined behavior in an external library (like // attempting to unlock an unlocked mutex in pthreads). Any API external to the library falls under this category // (from system calls to compiler intrinsics). We generally don't expect these failures to compromize memory safety or // otherwise create an immediate security issue. // // - `_LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR` -- checks any operations that exchange nodes between containers to make sure // the containers have compatible allocators. // // - `_LIBCPP_ASSERT_ARGUMENT_WITHIN_DOMAIN` -- checks that the given argument is within the domain of valid arguments // for the function. Violating this typically produces an incorrect result (e.g. the clamp algorithm returns the // original value without clamping it due to incorrect functors) or puts an object into an invalid state (e.g. // a string view where only a subset of elements is possible to access). This category is for assertions violating // which doesn't cause any immediate issues in the library -- whatever the consequences are, they will happen in the // user code. // // - `_LIBCPP_ASSERT_PEDANTIC` -- checks prerequisites which are imposed by the Standard, but violating which happens to // be benign in our implementation. // // - `_LIBCPP_ASSERT_SEMANTIC_REQUIREMENT` -- checks that the given argument satisfies the semantic requirements imposed // by the Standard. Typically, there is no simple way to completely prove that a semantic requirement is satisfied; // thus, this would often be a heuristic check and it might be quite expensive. // // - `_LIBCPP_ASSERT_INTERNAL` -- checks that internal invariants of the library hold. These assertions don't depend on // user input. // // - `_LIBCPP_ASSERT_UNCATEGORIZED` -- for assertions that haven't been properly classified yet. // clang-format off #define _LIBCPP_HARDENING_MODE_NONE … #define _LIBCPP_HARDENING_MODE_FAST … #define _LIBCPP_HARDENING_MODE_EXTENSIVE … #define _LIBCPP_HARDENING_MODE_DEBUG … // clang-format on # ifndef _LIBCPP_HARDENING_MODE # ifndef _LIBCPP_HARDENING_MODE_DEFAULT # error _LIBCPP_HARDENING_MODE_DEFAULT is not defined. This definition should be set at configuration time in the \ `__config_site` header, please make sure your installation of libc++ is not broken. # endif #define _LIBCPP_HARDENING_MODE … # endif # if _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_NONE && \ _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_FAST && \ _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_EXTENSIVE && \ _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_DEBUG # error _LIBCPP_HARDENING_MODE must be set to one of the following values: \ _LIBCPP_HARDENING_MODE_NONE, \ _LIBCPP_HARDENING_MODE_FAST, \ _LIBCPP_HARDENING_MODE_EXTENSIVE, \ _LIBCPP_HARDENING_MODE_DEBUG # endif // } HARDENING #define _LIBCPP_TOSTRING2(x) … #define _LIBCPP_TOSTRING(x) … // NOLINTNEXTLINE(libcpp-cpp-version-check) # if __cplusplus < 201103L #define _LIBCPP_CXX03_LANG # endif # ifndef __has_constexpr_builtin #define __has_constexpr_builtin … # endif // This checks wheter a Clang module is built # ifndef __building_module #define __building_module … # endif // '__is_identifier' returns '0' if '__x' is a reserved identifier provided by // the compiler and '1' otherwise. # ifndef __is_identifier #define __is_identifier … # endif # ifndef __has_declspec_attribute #define __has_declspec_attribute … # endif #define __has_keyword(__x) … # ifndef __has_warning #define __has_warning … # endif # if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L # error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" # endif // FIXME: ABI detection should be done via compiler builtin macros. This // is just a placeholder until Clang implements such macros. For now assume // that Windows compilers pretending to be MSVC++ target the Microsoft ABI, // and allow the user to explicitly specify the ABI to handle cases where this // heuristic falls short. # if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) # error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" # elif defined(_LIBCPP_ABI_FORCE_ITANIUM) #define _LIBCPP_ABI_ITANIUM # elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) #define _LIBCPP_ABI_MICROSOFT # else # if defined(_WIN32) && defined(_MSC_VER) #define _LIBCPP_ABI_MICROSOFT # else #define _LIBCPP_ABI_ITANIUM # endif # endif # if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) #define _LIBCPP_ABI_VCRUNTIME # endif # if __has_feature(experimental_library) # ifndef _LIBCPP_ENABLE_EXPERIMENTAL #define _LIBCPP_ENABLE_EXPERIMENTAL # endif # endif // Incomplete features get their own specific disabling flags. This makes it // easier to grep for target specific flags once the feature is complete. # if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) #define _LIBCPP_HAS_NO_INCOMPLETE_PSTL #define _LIBCPP_HAS_NO_EXPERIMENTAL_STOP_TOKEN #define _LIBCPP_HAS_NO_EXPERIMENTAL_TZDB #define _LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM # endif # if defined(__MVS__) # include <features.h> // for __NATIVE_ASCII_F # endif # if defined(_WIN32) #define _LIBCPP_WIN32API #define _LIBCPP_SHORT_WCHAR … // Both MinGW and native MSVC provide a "MSVC"-like environment #define _LIBCPP_MSVCRT_LIKE // If mingw not explicitly detected, assume using MS C runtime only if // a MS compatibility version is specified. # if defined(_MSC_VER) && !defined(__MINGW32__) #define _LIBCPP_MSVCRT … # endif # if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) #define _LIBCPP_HAS_BITSCAN64 # endif #define _LIBCPP_HAS_OPEN_WITH_WCHAR # endif // defined(_WIN32) # if defined(_AIX) && !defined(__64BIT__) // The size of wchar is 2 byte on 32-bit mode on AIX. #define _LIBCPP_SHORT_WCHAR … # endif // Libc++ supports various implementations of std::random_device. // // _LIBCPP_USING_DEV_RANDOM // Read entropy from the given file, by default `/dev/urandom`. // If a token is provided, it is assumed to be the path to a file // to read entropy from. This is the default behavior if nothing // else is specified. This implementation requires storing state // inside `std::random_device`. // // _LIBCPP_USING_ARC4_RANDOM // Use arc4random(). This allows obtaining random data even when // using sandboxing mechanisms. On some platforms like Apple, this // is the recommended source of entropy for user-space programs. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_GETENTROPY // Use getentropy(). // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_FUCHSIA_CPRNG // Use Fuchsia's zx_cprng_draw() system call, which is specified to // deliver high-quality entropy and cannot fail. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_NACL_RANDOM // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, // including accesses to the special files under `/dev`. This implementation // uses the NaCL syscall `nacl_secure_random_init()` to get entropy. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_WIN32_RANDOM // Use rand_s(), for use on Windows. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. # if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ defined(__DragonFly__) #define _LIBCPP_USING_ARC4_RANDOM # elif defined(__wasi__) || defined(__EMSCRIPTEN__) #define _LIBCPP_USING_GETENTROPY # elif defined(__Fuchsia__) #define _LIBCPP_USING_FUCHSIA_CPRNG # elif defined(__native_client__) #define _LIBCPP_USING_NACL_RANDOM # elif defined(_LIBCPP_WIN32API) #define _LIBCPP_USING_WIN32_RANDOM # else #define _LIBCPP_USING_DEV_RANDOM # endif # ifndef _LIBCPP_CXX03_LANG #define _LIBCPP_ALIGNOF(_Tp) … #define _ALIGNAS_TYPE(x) … #define _ALIGNAS(x) … #define _LIBCPP_NORETURN … #define _NOEXCEPT … #define _NOEXCEPT_(...) … #define _LIBCPP_CONSTEXPR … # else #define _LIBCPP_ALIGNOF … #define _ALIGNAS_TYPE … #define _ALIGNAS … #define _LIBCPP_NORETURN … #define _LIBCPP_HAS_NO_NOEXCEPT # define nullptr __nullptr #define _NOEXCEPT … #define _NOEXCEPT_ … # define static_assert(...) _Static_assert(__VA_ARGS__) # define decltype(...) __decltype(__VA_ARGS__) #define _LIBCPP_CONSTEXPR typedef __char16_t char16_t; typedef __char32_t char32_t; # endif #define _LIBCPP_PREFERRED_ALIGNOF(_Tp) … // Objective-C++ features (opt-in) # if __has_feature(objc_arc) #define _LIBCPP_HAS_OBJC_ARC # endif # if __has_feature(objc_arc_weak) #define _LIBCPP_HAS_OBJC_ARC_WEAK # endif # if __has_extension(blocks) #define _LIBCPP_HAS_EXTENSION_BLOCKS # endif # if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) #define _LIBCPP_HAS_BLOCKS_RUNTIME # endif # if !__has_feature(address_sanitizer) #define _LIBCPP_HAS_NO_ASAN # endif #define _LIBCPP_ALWAYS_INLINE … #define _LIBCPP_DISABLE_EXTENSION_WARNING … # if defined(_LIBCPP_OBJECT_FORMAT_COFF) # ifdef _DLL #define _LIBCPP_CRT_FUNC … # else #define _LIBCPP_CRT_FUNC # endif # if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) #define _LIBCPP_DLL_VIS #define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS #define _LIBCPP_OVERRIDABLE_FUNC_VIS #define _LIBCPP_EXPORTED_FROM_ABI # elif defined(_LIBCPP_BUILDING_LIBRARY) #define _LIBCPP_DLL_VIS … # if defined(__MINGW32__) #define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS … #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS # else #define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS … # endif #define _LIBCPP_OVERRIDABLE_FUNC_VIS … #define _LIBCPP_EXPORTED_FROM_ABI … # else #define _LIBCPP_DLL_VIS … #define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS … #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS #define _LIBCPP_OVERRIDABLE_FUNC_VIS #define _LIBCPP_EXPORTED_FROM_ABI … # endif #define _LIBCPP_HIDDEN #define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS #define _LIBCPP_TEMPLATE_VIS #define _LIBCPP_TEMPLATE_DATA_VIS #define _LIBCPP_TYPE_VISIBILITY_DEFAULT # else # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) #define _LIBCPP_VISIBILITY(vis) … # else #define _LIBCPP_VISIBILITY … # endif #define _LIBCPP_HIDDEN … #define _LIBCPP_TEMPLATE_DATA_VIS … #define _LIBCPP_EXPORTED_FROM_ABI … #define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS … #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS // TODO: Make this a proper customization point or remove the option to override it. # ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS #define _LIBCPP_OVERRIDABLE_FUNC_VIS … # endif # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) // The inline should be removed once PR32114 is resolved #define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS … # else #define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS # endif // GCC doesn't support the type_visibility attribute, so we have to keep the visibility attribute on templates # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && !__has_attribute(__type_visibility__) #define _LIBCPP_TEMPLATE_VIS … # else #define _LIBCPP_TEMPLATE_VIS # endif # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) #define _LIBCPP_TYPE_VISIBILITY_DEFAULT … # else #define _LIBCPP_TYPE_VISIBILITY_DEFAULT # endif # endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) # if __has_attribute(exclude_from_explicit_instantiation) #define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION … # else // Try to approximate the effect of exclude_from_explicit_instantiation // (which is that entities are not assumed to be provided by explicit // template instantiations in the dylib) by always inlining those entities. #define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION … # endif # ifdef _LIBCPP_COMPILER_CLANG_BASED #define _LIBCPP_DIAGNOSTIC_PUSH … #define _LIBCPP_DIAGNOSTIC_POP … #define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) … #define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) … # elif defined(_LIBCPP_COMPILER_GCC) #define _LIBCPP_DIAGNOSTIC_PUSH … #define _LIBCPP_DIAGNOSTIC_POP … #define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED … #define _LIBCPP_GCC_DIAGNOSTIC_IGNORED … # else #define _LIBCPP_DIAGNOSTIC_PUSH #define _LIBCPP_DIAGNOSTIC_POP #define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED … #define _LIBCPP_GCC_DIAGNOSTIC_IGNORED … # endif # if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST #define _LIBCPP_HARDENING_SIG … # elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE #define _LIBCPP_HARDENING_SIG … # elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG #define _LIBCPP_HARDENING_SIG … # else #define _LIBCPP_HARDENING_SIG … # endif # ifdef _LIBCPP_HAS_NO_EXCEPTIONS #define _LIBCPP_EXCEPTIONS_SIG … # else #define _LIBCPP_EXCEPTIONS_SIG … # endif #define _LIBCPP_ODR_SIGNATURE … // This macro marks a symbol as being hidden from libc++'s ABI. This is achieved // on two levels: // 1. The symbol is given hidden visibility, which ensures that users won't start exporting // symbols from their dynamic library by means of using the libc++ headers. This ensures // that those symbols stay private to the dynamic library in which it is defined. // // 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library. // This ensures that no ODR violation can arise from mixing two TUs compiled with different // versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the // program contains two definitions of a function, the ODR requires them to be token-by-token // equivalent, and the linker is allowed to pick either definition and discard the other one. // // For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled // *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs // compiled with different settings), the two definitions are both visible by the linker and they // have the same name, but they have a meaningfully different implementation (one throws an exception // and the other aborts the program). This violates the ODR and makes the program ill-formed, and in // practice what will happen is that the linker will pick one of the definitions at random and will // discard the other one. This can quite clearly lead to incorrect program behavior. // // A similar reasoning holds for many other properties that are ODR-affecting. Essentially any // property that causes the code of a function to differ from the code in another configuration // can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI // tag, but we encode the ones that we think are most important: library version, exceptions, and // hardening mode. // // Note that historically, solving this problem has been achieved in various ways, including // force-inlining all functions or giving internal linkage to all functions. Both these previous // solutions suffer from drawbacks that lead notably to code bloat. // // Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend // on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. // // Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions // instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled // name of a virtual function is part of its ABI, since some architectures like arm64e can sign // the virtual function pointer in the vtable based on the mangled name of the function. Since // we use an ABI tag that changes with each released version, the mangled name of the virtual // function would change, which is incorrect. Note that it doesn't make much sense to change // the implementation of a virtual function in an ABI-incompatible way in the first place, // since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable. // // The macro can be applied to record and enum types. When the tagged type is nested in // a record this "parent" record needs to have the macro too. Another use case for applying // this macro to records and unions is to apply an ABI tag to inline constexpr variables. // This can be useful for inline variables that are implementation details which are expected // to change in the future. // // TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing // the length of symbols with an ABI tag. In practice, we should remove the escape hatch and // use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. # ifndef _LIBCPP_NO_ABI_TAG #define _LIBCPP_HIDE_FROM_ABI … # else #define _LIBCPP_HIDE_FROM_ABI … # endif #define _LIBCPP_HIDE_FROM_ABI_VIRTUAL … # ifdef _LIBCPP_BUILDING_LIBRARY # if _LIBCPP_ABI_VERSION > 1 #define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 … # else #define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 # endif # else #define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 … # endif // TODO: Remove this workaround once we drop support for Clang 16 # if __has_warning("-Wc++23-extensions") #define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION … # else #define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION … # endif // Clang modules take a significant compile time hit when pushing and popping diagnostics. // Since all the headers are marked as system headers in the modulemap, we can simply disable this // pushing and popping when building with clang modules. # if !__has_feature(modules) #define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS … #define _LIBCPP_POP_EXTENSION_DIAGNOSTICS … # else #define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS #define _LIBCPP_POP_EXTENSION_DIAGNOSTICS # endif // Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. // clang-format off #define _LIBCPP_BEGIN_NAMESPACE_STD … #define _LIBCPP_END_NAMESPACE_STD … #ifdef _LIBCPP_ABI_NO_FILESYSTEM_INLINE_NAMESPACE #define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM … #define _LIBCPP_END_NAMESPACE_FILESYSTEM … #else #define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM … #define _LIBCPP_END_NAMESPACE_FILESYSTEM … #endif // clang-format on # if __has_attribute(__enable_if__) #define _LIBCPP_PREFERRED_OVERLOAD … # endif # if !defined(__SIZEOF_INT128__) || defined(_MSC_VER) #define _LIBCPP_HAS_NO_INT128 # endif # ifdef _LIBCPP_CXX03_LANG #define _LIBCPP_DECLARE_STRONG_ENUM … // clang-format off #define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG … // clang-format on # else // _LIBCPP_CXX03_LANG #define _LIBCPP_DECLARE_STRONG_ENUM(x) … #define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) … # endif // _LIBCPP_CXX03_LANG # if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__NetBSD__) #define _LIBCPP_LOCALE__L_EXTENSIONS … # endif # ifdef __FreeBSD__ #define _DECLARE_C99_LDBL_MATH … # endif // If we are getting operator new from the MSVC CRT, then allocation overloads // for align_val_t were added in 19.12, aka VS 2017 version 15.3. # if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 #define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION # elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) // We're deferring to Microsoft's STL to provide aligned new et al. We don't // have it unless the language feature test macro is defined. #define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION # elif defined(__MVS__) #define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION # endif # if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) #define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION # endif // It is not yet possible to use aligned_alloc() on all Apple platforms since // 10.15 was the first version to ship an implementation of aligned_alloc(). # if defined(__APPLE__) # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) #define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC # endif # elif defined(__ANDROID__) && __ANDROID_API__ < 28 // Android only provides aligned_alloc when targeting API 28 or higher. #define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC # endif # if defined(__APPLE__) || defined(__FreeBSD__) #define _LIBCPP_HAS_DEFAULTRUNELOCALE # endif # if defined(__APPLE__) || defined(__FreeBSD__) #define _LIBCPP_WCTYPE_IS_MASK # endif # if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) #define _LIBCPP_HAS_NO_CHAR8_T # endif // Deprecation macros. // // Deprecations warnings are always enabled, except when users explicitly opt-out // by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. # if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) # if __has_attribute(__deprecated__) #define _LIBCPP_DEPRECATED … #define _LIBCPP_DEPRECATED_(m) … # elif _LIBCPP_STD_VER >= 14 #define _LIBCPP_DEPRECATED … #define _LIBCPP_DEPRECATED_ … # else #define _LIBCPP_DEPRECATED #define _LIBCPP_DEPRECATED_ … # endif # else #define _LIBCPP_DEPRECATED #define _LIBCPP_DEPRECATED_ … # endif # if !defined(_LIBCPP_CXX03_LANG) #define _LIBCPP_DEPRECATED_IN_CXX11 … # else #define _LIBCPP_DEPRECATED_IN_CXX11 # endif # if _LIBCPP_STD_VER >= 14 #define _LIBCPP_DEPRECATED_IN_CXX14 … # else #define _LIBCPP_DEPRECATED_IN_CXX14 # endif # if _LIBCPP_STD_VER >= 17 #define _LIBCPP_DEPRECATED_IN_CXX17 … # else #define _LIBCPP_DEPRECATED_IN_CXX17 # endif # if _LIBCPP_STD_VER >= 20 #define _LIBCPP_DEPRECATED_IN_CXX20 … # else #define _LIBCPP_DEPRECATED_IN_CXX20 # endif # if _LIBCPP_STD_VER >= 23 #define _LIBCPP_DEPRECATED_IN_CXX23 … # else #define _LIBCPP_DEPRECATED_IN_CXX23 # endif # if _LIBCPP_STD_VER >= 26 #define _LIBCPP_DEPRECATED_IN_CXX26 … # else #define _LIBCPP_DEPRECATED_IN_CXX26 # endif # if !defined(_LIBCPP_HAS_NO_CHAR8_T) #define _LIBCPP_DEPRECATED_WITH_CHAR8_T … # else #define _LIBCPP_DEPRECATED_WITH_CHAR8_T # endif // Macros to enter and leave a state where deprecation warnings are suppressed. # if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) #define _LIBCPP_SUPPRESS_DEPRECATED_PUSH … #define _LIBCPP_SUPPRESS_DEPRECATED_POP … # else #define _LIBCPP_SUPPRESS_DEPRECATED_PUSH #define _LIBCPP_SUPPRESS_DEPRECATED_POP # endif # if _LIBCPP_STD_VER <= 11 #define _LIBCPP_EXPLICIT_SINCE_CXX14 # else #define _LIBCPP_EXPLICIT_SINCE_CXX14 … # endif # if _LIBCPP_STD_VER >= 23 #define _LIBCPP_EXPLICIT_SINCE_CXX23 … # else #define _LIBCPP_EXPLICIT_SINCE_CXX23 # endif # if _LIBCPP_STD_VER >= 14 #define _LIBCPP_CONSTEXPR_SINCE_CXX14 … # else #define _LIBCPP_CONSTEXPR_SINCE_CXX14 # endif # if _LIBCPP_STD_VER >= 17 #define _LIBCPP_CONSTEXPR_SINCE_CXX17 … # else #define _LIBCPP_CONSTEXPR_SINCE_CXX17 # endif # if _LIBCPP_STD_VER >= 20 #define _LIBCPP_CONSTEXPR_SINCE_CXX20 … # else #define _LIBCPP_CONSTEXPR_SINCE_CXX20 # endif # if _LIBCPP_STD_VER >= 23 #define _LIBCPP_CONSTEXPR_SINCE_CXX23 … # else #define _LIBCPP_CONSTEXPR_SINCE_CXX23 # endif # if _LIBCPP_STD_VER >= 26 #define _LIBCPP_CONSTEXPR_SINCE_CXX26 … # else #define _LIBCPP_CONSTEXPR_SINCE_CXX26 # endif # ifndef _LIBCPP_WEAK #define _LIBCPP_WEAK … # endif // Thread API // clang-format off # if !defined(_LIBCPP_HAS_NO_THREADS) && \ !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) # if defined(__FreeBSD__) || \ defined(__wasi__) || \ defined(__NetBSD__) || \ defined(__OpenBSD__) || \ defined(__NuttX__) || \ defined(__linux__) || \ defined(__GNU__) || \ defined(__APPLE__) || \ defined(__MVS__) || \ defined(_AIX) || \ defined(__EMSCRIPTEN__) // clang-format on #define _LIBCPP_HAS_THREAD_API_PTHREAD # elif defined(__Fuchsia__) // TODO(44575): Switch to C11 thread API when possible. #define _LIBCPP_HAS_THREAD_API_PTHREAD # elif defined(_LIBCPP_WIN32API) #define _LIBCPP_HAS_THREAD_API_WIN32 # else # error "No thread API" # endif // _LIBCPP_HAS_THREAD_API # endif // _LIBCPP_HAS_NO_THREADS # if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) # if defined(__ANDROID__) && __ANDROID_API__ >= 30 #define _LIBCPP_HAS_COND_CLOCKWAIT # elif defined(_LIBCPP_GLIBC_PREREQ) # if _LIBCPP_GLIBC_PREREQ(2, 30) #define _LIBCPP_HAS_COND_CLOCKWAIT # endif # endif # endif # if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) # error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ _LIBCPP_HAS_NO_THREADS is not defined. # endif # if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) # error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ _LIBCPP_HAS_NO_THREADS is defined. # endif # if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) # error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ _LIBCPP_HAS_NO_THREADS is defined. # endif # if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) #define __STDCPP_THREADS__ … # endif // The glibc and Bionic implementation of pthreads implements // pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 // mutexes have no destroy mechanism. // // This optimization can't be performed on Apple platforms, where // pthread_mutex_destroy can allow the kernel to release resources. // See https://llvm.org/D64298 for details. // // TODO(EricWF): Enable this optimization on Bionic after speaking to their // respective stakeholders. // clang-format off # if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ defined(_LIBCPP_HAS_THREAD_API_WIN32) // clang-format on #define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION # endif // Destroying a condvar is a nop on Windows. // // This optimization can't be performed on Apple platforms, where // pthread_cond_destroy can allow the kernel to release resources. // See https://llvm.org/D64298 for details. // // TODO(EricWF): This is potentially true for some pthread implementations // as well. # if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) #define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION # endif # if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) #define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE # endif # if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) #define _LIBCPP_HAS_C_ATOMIC_IMP # elif defined(_LIBCPP_COMPILER_GCC) #define _LIBCPP_HAS_GCC_ATOMIC_IMP # endif # if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) #define _LIBCPP_HAS_NO_ATOMIC_HEADER # else # ifndef _LIBCPP_ATOMIC_FLAG_TYPE #define _LIBCPP_ATOMIC_FLAG_TYPE … # endif # endif # if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(__no_thread_safety_analysis__) #define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS … # else #define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS # endif # if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) # if defined(__clang__) && __has_attribute(acquire_capability) // Work around the attribute handling in clang. When both __declspec and // __attribute__ are present, the processing goes awry preventing the definition // of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus // combining the two does work. # if !defined(_MSC_VER) #define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS # endif # endif # endif # ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS #define _LIBCPP_THREAD_SAFETY_ANNOTATION … # else #define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) … # endif # if _LIBCPP_STD_VER >= 20 #define _LIBCPP_CONSTINIT … # elif __has_attribute(__require_constant_initialization__) #define _LIBCPP_CONSTINIT … # else #define _LIBCPP_CONSTINIT # endif # if defined(__CUDACC__) || defined(__CUDA_ARCH__) || defined(__CUDA_LIBDEVICE__) // The CUDA SDK contains an unfortunate definition for the __noinline__ macro, // which breaks the regular __attribute__((__noinline__)) syntax. Therefore, // when compiling for CUDA we use the non-underscored version of the noinline // attribute. // // This is a temporary workaround and we still expect the CUDA SDK team to solve // this issue properly in the SDK headers. // // See https://github.com/llvm/llvm-project/pull/73838 for more details. #define _LIBCPP_NOINLINE … # elif __has_attribute(__noinline__) #define _LIBCPP_NOINLINE … # else #define _LIBCPP_NOINLINE # endif // We often repeat things just for handling wide characters in the library. // When wide characters are disabled, it can be useful to have a quick way of // disabling it without having to resort to #if-#endif, which has a larger // impact on readability. # if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) #define _LIBCPP_IF_WIDE_CHARACTERS … # else #define _LIBCPP_IF_WIDE_CHARACTERS(...) … # endif // clang-format off #define _LIBCPP_PUSH_MACROS … #define _LIBCPP_POP_MACROS … // clang-format on # ifndef _LIBCPP_NO_AUTO_LINK # if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # pragma comment(lib, "c++.lib") # else # pragma comment(lib, "libc++.lib") # endif # endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) # endif // _LIBCPP_NO_AUTO_LINK // Configures the fopen close-on-exec mode character, if any. This string will // be appended to any mode string used by fstream for fopen/fdopen. // // Not all platforms support this, but it helps avoid fd-leaks on platforms that // do. # if defined(__BIONIC__) #define _LIBCPP_FOPEN_CLOEXEC_MODE … # else #define _LIBCPP_FOPEN_CLOEXEC_MODE # endif # if __has_cpp_attribute(msvc::no_unique_address) // MSVC implements [[no_unique_address]] as a silent no-op currently. // (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) // However, MSVC implements [[msvc::no_unique_address]] which does what // [[no_unique_address]] is supposed to do, in general. // Clang-cl does not yet (14.0) implement either [[no_unique_address]] or // [[msvc::no_unique_address]] though. If/when it does implement // [[msvc::no_unique_address]], this should be preferred though. #define _LIBCPP_NO_UNIQUE_ADDRESS … # elif __has_cpp_attribute(no_unique_address) #define _LIBCPP_NO_UNIQUE_ADDRESS … # else #define _LIBCPP_NO_UNIQUE_ADDRESS … // Note that this can be replaced by #error as soon as clang-cl // implements msvc::no_unique_address, since there should be no C++20 // compiler that doesn't support one of the two attributes at that point. // We generally don't want to use this macro outside of C++20-only code, // because using it conditionally in one language version only would make // the ABI inconsistent. # endif // c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these // functions is gradually being added to existing C libraries. The conditions // below check for known C library versions and conditions under which these // functions are declared by the C library. #define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 // GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if // __cpp_char8_t is defined or if C2X extensions are enabled. Determining // the latter depends on internal GNU libc details that are not appropriate // to depend on here, so any declarations present when __cpp_char8_t is not // defined are ignored. # if defined(_LIBCPP_GLIBC_PREREQ) # if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) # undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 # endif # endif // There are a handful of public standard library types that are intended to // support CTAD but don't need any explicit deduction guides to do so. This // macro is used to mark them as such, which suppresses the // '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code // with these classes. # if _LIBCPP_STD_VER >= 17 # ifdef _LIBCPP_COMPILER_CLANG_BASED #define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) … # else #define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE … # endif # else #define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE … # endif // TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use // compiler intrinsics in the Objective-C++ mode. # ifdef __OBJC__ #define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS # endif #define _PSTL_PRAGMA(x) … // Enable SIMD for compilers that support OpenMP 4.0 # if (defined(_OPENMP) && _OPENMP >= 201307) #define _PSTL_UDR_PRESENT #define _PSTL_PRAGMA_SIMD … #define _PSTL_PRAGMA_DECLARE_SIMD … #define _PSTL_PRAGMA_SIMD_REDUCTION … #define _PSTL_PRAGMA_SIMD_SCAN … #define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN … #define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN … // Declaration of reduction functor, where // NAME - the name of the functor // OP - type of the callable object with the reduction operation // omp_in - refers to the local partial result // omp_out - refers to the final value of the combiner operator // omp_priv - refers to the private copy of the initial value // omp_orig - refers to the original variable to be reduced #define _PSTL_PRAGMA_DECLARE_REDUCTION … # elif defined(_LIBCPP_COMPILER_CLANG_BASED) #define _PSTL_PRAGMA_SIMD … #define _PSTL_PRAGMA_DECLARE_SIMD #define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) … #define _PSTL_PRAGMA_SIMD_SCAN(PRM) … #define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) … #define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) … #define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) … # else // (defined(_OPENMP) && _OPENMP >= 201307) #define _PSTL_PRAGMA_SIMD #define _PSTL_PRAGMA_DECLARE_SIMD #define _PSTL_PRAGMA_SIMD_REDUCTION … #define _PSTL_PRAGMA_SIMD_SCAN … #define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN … #define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN … #define _PSTL_PRAGMA_DECLARE_REDUCTION … # endif // (defined(_OPENMP) && _OPENMP >= 201307) #define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED // Optional attributes - these are useful for a better QoI, but not required to be available # if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) #define _LIBCPP_NO_CFI … # else #define _LIBCPP_NO_CFI # endif # if __has_attribute(__malloc__) #define _LIBCPP_NOALIAS … # else #define _LIBCPP_NOALIAS # endif # if __has_attribute(__using_if_exists__) #define _LIBCPP_USING_IF_EXISTS … # else #define _LIBCPP_USING_IF_EXISTS # endif # if __has_cpp_attribute(__nodiscard__) #define _LIBCPP_NODISCARD … # else // We can't use GCC's [[gnu::warn_unused_result]] and // __attribute__((warn_unused_result)), because GCC does not silence them via // (void) cast. #define _LIBCPP_NODISCARD # endif # if __has_attribute(__no_destroy__) #define _LIBCPP_NO_DESTROY … # else #define _LIBCPP_NO_DESTROY # endif # if __has_attribute(__diagnose_if__) #define _LIBCPP_DIAGNOSE_WARNING(...) … # else #define _LIBCPP_DIAGNOSE_WARNING … # endif // Use a function like macro to imply that it must be followed by a semicolon # if __has_cpp_attribute(fallthrough) #define _LIBCPP_FALLTHROUGH() … # elif __has_attribute(__fallthrough__) #define _LIBCPP_FALLTHROUGH … # else #define _LIBCPP_FALLTHROUGH … # endif # if __has_cpp_attribute(_Clang::__lifetimebound__) #define _LIBCPP_LIFETIMEBOUND … # else #define _LIBCPP_LIFETIMEBOUND # endif # if __has_attribute(__nodebug__) #define _LIBCPP_NODEBUG … # else #define _LIBCPP_NODEBUG # endif # if __has_attribute(__standalone_debug__) #define _LIBCPP_STANDALONE_DEBUG … # else #define _LIBCPP_STANDALONE_DEBUG # endif # if __has_attribute(__preferred_name__) #define _LIBCPP_PREFERRED_NAME(x) … # else #define _LIBCPP_PREFERRED_NAME … # endif # if __has_attribute(__no_sanitize__) #define _LIBCPP_NO_SANITIZE(...) … # else #define _LIBCPP_NO_SANITIZE … # endif # if __has_attribute(__init_priority__) #define _LIBCPP_INIT_PRIORITY_MAX … # else #define _LIBCPP_INIT_PRIORITY_MAX # endif # if __has_attribute(__format__) // The attribute uses 1-based indices for ordinary and static member functions. // The attribute uses 2-based indices for non-static member functions. #define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) … # else #define _LIBCPP_ATTRIBUTE_FORMAT … # endif # if __has_attribute(__packed__) #define _LIBCPP_PACKED … # else #define _LIBCPP_PACKED # endif # if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases) #define _LIBCPP_DECLSPEC_EMPTY_BASES … # else #define _LIBCPP_DECLSPEC_EMPTY_BASES # endif // Allow for build-time disabling of unsigned integer sanitization # if __has_attribute(no_sanitize) && !defined(_LIBCPP_COMPILER_GCC) #define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK … # else #define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK # endif // Clang-18 has support for deducing this, but it does not set the FTM. # if defined(__cpp_explicit_this_parameter) || (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1800) #define _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER # endif #endif // __cplusplus #endif // _LIBCPP___CONFIG
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