// -*- 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___CONFIGURATION_AVAILABILITY_H #define _LIBCPP___CONFIGURATION_AVAILABILITY_H #include <__configuration/compiler.h> #include <__configuration/language.h> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif // This file defines a framework that can be used by vendors to encode the version of an operating system that various // features of libc++ has been shipped in. This is primarily intended to allow safely deploying an executable built with // a new version of the library on a platform containing an older version of the built library. // Detailed documentation for this can be found at https://libcxx.llvm.org/VendorDocumentation.html#availability-markup // Availability markup is disabled when building the library, or when a non-Clang // compiler is used because only Clang supports the necessary attributes. // // We also allow users to force-disable availability markup via the `_LIBCPP_DISABLE_AVAILABILITY` // macro because that is the only way to work around a Clang bug related to availability // attributes: https://llvm.org/PR134151. // Once that bug has been fixed, we should remove the macro. #if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCXXABI_BUILDING_LIBRARY) || \ !defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_DISABLE_AVAILABILITY) # undef _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS # define _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS 0 #endif // When availability annotations are disabled, we take for granted that features introduced // in all versions of the library are available. #if !_LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS # define _LIBCPP_INTRODUCED_IN_LLVM_22 1 # define _LIBCPP_INTRODUCED_IN_LLVM_22_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_21 1 # define _LIBCPP_INTRODUCED_IN_LLVM_21_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_20 1 # define _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_19 1 # define _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_18 1 # define _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_16 1 # define _LIBCPP_INTRODUCED_IN_LLVM_16_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_15 1 # define _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_14 1 # define _LIBCPP_INTRODUCED_IN_LLVM_14_ATTRIBUTE /* nothing */ # define _LIBCPP_INTRODUCED_IN_LLVM_12 1 # define _LIBCPP_INTRODUCED_IN_LLVM_12_ATTRIBUTE /* nothing */ #elif defined(__APPLE__) // clang-format off // LLVM 22 // TODO: Fill this in # define _LIBCPP_INTRODUCED_IN_LLVM_22 0 # define _LIBCPP_INTRODUCED_IN_LLVM_22_ATTRIBUTE __attribute__((unavailable)) // LLVM 21 // TODO: Fill this in # define _LIBCPP_INTRODUCED_IN_LLVM_21 0 # define _LIBCPP_INTRODUCED_IN_LLVM_21_ATTRIBUTE __attribute__((unavailable)) // LLVM 20 // // Note that versions for most Apple OSes were bumped forward and aligned in that release. # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 260000) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 260000) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 260000) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 260000) || \ (defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 100000) # define _LIBCPP_INTRODUCED_IN_LLVM_20 0 # else # define _LIBCPP_INTRODUCED_IN_LLVM_20 1 # endif # define _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE \ __attribute__((availability(macos, strict, introduced = 26.0))) \ __attribute__((availability(ios, strict, introduced = 26.0))) \ __attribute__((availability(tvos, strict, introduced = 26.0))) \ __attribute__((availability(watchos, strict, introduced = 26.0))) \ __attribute__((availability(bridgeos, strict, introduced = 10.0))) // LLVM 19 # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 150400) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 180400) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 180400) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 110400) || \ (defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 90400) # define _LIBCPP_INTRODUCED_IN_LLVM_19 0 # else # define _LIBCPP_INTRODUCED_IN_LLVM_19 1 # endif # define _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE \ __attribute__((availability(macos, strict, introduced = 15.4))) \ __attribute__((availability(ios, strict, introduced = 18.4))) \ __attribute__((availability(tvos, strict, introduced = 18.4))) \ __attribute__((availability(watchos, strict, introduced = 11.4))) \ __attribute__((availability(bridgeos, strict, introduced = 9.4))) // LLVM 18 # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 150000) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 180000) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 180000) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 110000) || \ (defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 90000) || \ (defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 240000) # define _LIBCPP_INTRODUCED_IN_LLVM_18 0 # else # define _LIBCPP_INTRODUCED_IN_LLVM_18 1 # endif # define _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE \ __attribute__((availability(macos, strict, introduced = 15.0))) \ __attribute__((availability(ios, strict, introduced = 18.0))) \ __attribute__((availability(tvos, strict, introduced = 18.0))) \ __attribute__((availability(watchos, strict, introduced = 11.0))) \ __attribute__((availability(bridgeos, strict, introduced = 9.0))) \ __attribute__((availability(driverkit, strict, introduced = 24.0))) // LLVM 16 # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 140000) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 170000) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 170000) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 100000) || \ (defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 80000) || \ (defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 230000) # define _LIBCPP_INTRODUCED_IN_LLVM_16 0 # else # define _LIBCPP_INTRODUCED_IN_LLVM_16 1 # endif # define _LIBCPP_INTRODUCED_IN_LLVM_16_ATTRIBUTE \ __attribute__((availability(macos, strict, introduced = 14.0))) \ __attribute__((availability(ios, strict, introduced = 17.0))) \ __attribute__((availability(tvos, strict, introduced = 17.0))) \ __attribute__((availability(watchos, strict, introduced = 10.0))) \ __attribute__((availability(bridgeos, strict, introduced = 8.0))) \ __attribute__((availability(driverkit, strict, introduced = 23.0))) // LLVM 15 # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 130300) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 160300) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 160300) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 90300) || \ (defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 70500) || \ (defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 220400) # define _LIBCPP_INTRODUCED_IN_LLVM_15 0 # else # define _LIBCPP_INTRODUCED_IN_LLVM_15 1 # endif # define _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE \ __attribute__((availability(macos, strict, introduced = 13.3))) \ __attribute__((availability(ios, strict, introduced = 16.3))) \ __attribute__((availability(tvos, strict, introduced = 16.3))) \ __attribute__((availability(watchos, strict, introduced = 9.3))) \ __attribute__((availability(bridgeos, strict, introduced = 7.5))) \ __attribute__((availability(driverkit, strict, introduced = 22.4))) // LLVM 14 # define _LIBCPP_INTRODUCED_IN_LLVM_14 _LIBCPP_INTRODUCED_IN_LLVM_15 # define _LIBCPP_INTRODUCED_IN_LLVM_14_ATTRIBUTE _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE // LLVM 12 # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 120300) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 150300) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 150300) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 80300) || \ (defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 60000) || \ (defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 210300) # define _LIBCPP_INTRODUCED_IN_LLVM_12 0 # else # define _LIBCPP_INTRODUCED_IN_LLVM_12 1 # endif # define _LIBCPP_INTRODUCED_IN_LLVM_12_ATTRIBUTE \ __attribute__((availability(macos, strict, introduced = 12.3))) \ __attribute__((availability(ios, strict, introduced = 15.3))) \ __attribute__((availability(tvos, strict, introduced = 15.3))) \ __attribute__((availability(watchos, strict, introduced = 8.3))) \ __attribute__((availability(bridgeos, strict, introduced = 6.0))) \ __attribute__((availability(driverkit, strict, introduced = 21.3))) # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 110000) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 150000) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 150000) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 80000) || \ (defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 200000) # warning "The selected platform is no longer supported by libc++." # endif #else // ...New vendors can add availability markup here... # error \ "It looks like you're trying to enable vendor availability markup, but you haven't defined the corresponding macros yet!" #endif // This controls the availability of new implementation of std::atomic's // wait, notify_one and notify_all. The new implementation uses // the native atomic wait/notify operations on platforms that support them // based on the size of the atomic type, instead of the type itself. #define _LIBCPP_AVAILABILITY_HAS_NEW_SYNC _LIBCPP_INTRODUCED_IN_LLVM_22 #define _LIBCPP_AVAILABILITY_NEW_SYNC _LIBCPP_INTRODUCED_IN_LLVM_22_ATTRIBUTE // This controls whether `std::__hash_memory` is available in the dylib, which // is used for some `std::hash` specializations. #define _LIBCPP_AVAILABILITY_HAS_HASH_MEMORY _LIBCPP_INTRODUCED_IN_LLVM_21 // No attribute, since we've had hash in the headers before // This controls whether we provide a message for `bad_function_call::what()` that specific to `std::bad_function_call`. // See https://wg21.link/LWG2233. This requires `std::bad_function_call::what()` to be available in the dylib. #define _LIBCPP_AVAILABILITY_HAS_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE _LIBCPP_INTRODUCED_IN_LLVM_21 // No attribute, since we've had bad_function_call::what() in the headers before // This controls the availability of floating-point std::from_chars functions. // These overloads were added later than the integer overloads. #define _LIBCPP_AVAILABILITY_HAS_FROM_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_20 #define _LIBCPP_AVAILABILITY_FROM_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE // This controls the availability of the C++20 time zone database. // The parser code is built in the library. #define _LIBCPP_AVAILABILITY_HAS_TZDB _LIBCPP_INTRODUCED_IN_LLVM_19 #define _LIBCPP_AVAILABILITY_TZDB _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE // These macros determine whether we assume that std::bad_function_call and // std::bad_expected_access provide a key function in the dylib. This allows // centralizing their vtable and typeinfo instead of having all TUs provide // a weak definition that then gets deduplicated. #define _LIBCPP_AVAILABILITY_HAS_BAD_FUNCTION_CALL_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19 #define _LIBCPP_AVAILABILITY_BAD_FUNCTION_CALL_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE #define _LIBCPP_AVAILABILITY_HAS_BAD_EXPECTED_ACCESS_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19 #define _LIBCPP_AVAILABILITY_BAD_EXPECTED_ACCESS_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE // These macros controls the availability of __cxa_init_primary_exception // in the built library, which std::make_exception_ptr might use // (see libcxx/include/__exception/exception_ptr.h). #define _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION _LIBCPP_INTRODUCED_IN_LLVM_18 #define _LIBCPP_AVAILABILITY_INIT_PRIMARY_EXCEPTION _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE // This controls the availability of the C++17 std::pmr library, // which is implemented in large part in the built library. // // TODO: Enable std::pmr markup once https://llvm.org/PR40340 has been fixed // Until then, it is possible for folks to try to use `std::pmr` when back-deploying to targets that don't support // it and it'll be a load-time error, but we don't have a good alternative because the library won't compile if we // use availability annotations until that bug has been fixed. #define _LIBCPP_AVAILABILITY_HAS_PMR _LIBCPP_INTRODUCED_IN_LLVM_16 #define _LIBCPP_AVAILABILITY_PMR // This controls whether the library claims to provide a default verbose // termination function, and consequently whether the headers will try // to use it when the mechanism isn't overriden at compile-time. #define _LIBCPP_AVAILABILITY_HAS_VERBOSE_ABORT _LIBCPP_INTRODUCED_IN_LLVM_15 #define _LIBCPP_AVAILABILITY_VERBOSE_ABORT _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE // This controls the availability of floating-point std::to_chars functions. // These overloads were added later than the integer overloads. #define _LIBCPP_AVAILABILITY_HAS_TO_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_14 #define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_14_ATTRIBUTE // Enable additional explicit instantiations of iostreams components. This // reduces the number of weak definitions generated in programs that use // iostreams by providing a single strong definition in the shared library. // // TODO: Enable additional explicit instantiations on GCC once it supports exclude_from_explicit_instantiation, // or once libc++ doesn't use the attribute anymore. // TODO: Enable them on Windows once https://llvm.org/PR41018 has been fixed. #if !defined(_LIBCPP_COMPILER_GCC) && !defined(_WIN32) # define _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 _LIBCPP_INTRODUCED_IN_LLVM_12 #else # define _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 0 #endif // Only define a bunch of symbols in the dylib if we need to be compatible with LLVM 7 headers or older # if defined(_LIBCPP_BUILDING_LIBRARY) && _LIBCPP_AVAILABILITY_MINIMUM_HEADER_VERSION < 8 # define _LIBCPP_HIDE_FROM_ABI_SINCE_LLVM8 # else # define _LIBCPP_HIDE_FROM_ABI_SINCE_LLVM8 _LIBCPP_HIDE_FROM_ABI # endif #endif // _LIBCPP___CONFIGURATION_AVAILABILITY_H