| // -*- 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 |
| |
| // Libc++ is shipped by various vendors. In particular, it is used as a system |
| // library on macOS, iOS and other Apple platforms. In order for users to be |
| // able to compile a binary that is intended to be deployed to an older version |
| // of a platform, Clang provides availability attributes [1]. These attributes |
| // can be placed on declarations and are used to describe the life cycle of a |
| // symbol in the library. |
| // |
| // The main goal is to ensure a compile-time error if a symbol that hasn't been |
| // introduced in a previously released library is used in a program that targets |
| // that previously released library. Normally, this would be a load-time error |
| // when one tries to launch the program against the older library. |
| // |
| // For example, the filesystem library was introduced in the dylib in LLVM 9. |
| // On Apple platforms, this corresponds to macOS 10.15. If a user compiles on |
| // a macOS 10.15 host but targets macOS 10.13 with their program, the compiler |
| // would normally not complain (because the required declarations are in the |
| // headers), but the dynamic loader would fail to find the symbols when actually |
| // trying to launch the program on macOS 10.13. To turn this into a compile-time |
| // issue instead, declarations are annotated with when they were introduced, and |
| // the compiler can produce a diagnostic if the program references something that |
| // isn't available on the deployment target. |
| // |
| // This mechanism is general in nature, and any vendor can add their markup to |
| // the library (see below). Whenever a new feature is added that requires support |
| // in the shared library, two macros are added below to allow marking the feature |
| // as unavailable: |
| // 1. A macro named `_LIBCPP_AVAILABILITY_HAS_<feature>` which must be defined |
| // to `_LIBCPP_INTRODUCED_IN_<version>` for the appropriate LLVM version. |
| // 2. A macro named `_LIBCPP_AVAILABILITY_<feature>`, which must be defined to |
| // `_LIBCPP_INTRODUCED_IN_<version>_MARKUP` for the appropriate LLVM version. |
| // |
| // When vendors decide to ship the feature as part of their shared library, they |
| // can update the `_LIBCPP_INTRODUCED_IN_<version>` macro (and the markup counterpart) |
| // based on the platform version they shipped that version of LLVM in. The library |
| // will then use this markup to provide an optimal user experience on these platforms. |
| // |
| // Furthermore, many features in the standard library have corresponding |
| // feature-test macros. The `_LIBCPP_AVAILABILITY_HAS_<feature>` macros |
| // are checked by the corresponding feature-test macros generated by |
| // generate_feature_test_macro_components.py to ensure that the library |
| // doesn't announce a feature as being implemented if it is unavailable on |
| // the deployment target. |
| // |
| // Note that this mechanism is disabled by default in the "upstream" libc++. |
| // Availability annotations are only meaningful when shipping libc++ inside |
| // a platform (i.e. as a system library), and so vendors that want them should |
| // turn those annotations on at CMake configuration time. |
| // |
| // [1]: https://clang.llvm.org/docs/AttributeReference.html#availability |
| |
| // Availability markup is disabled when building the library, or when a non-Clang |
| // compiler is used because only Clang supports the necessary attributes. |
| #if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCXXABI_BUILDING_LIBRARY) || !defined(_LIBCPP_COMPILER_CLANG_BASED) |
| # 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_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 */ |
| |
| # define _LIBCPP_INTRODUCED_IN_LLVM_11 1 |
| # define _LIBCPP_INTRODUCED_IN_LLVM_11_ATTRIBUTE /* nothing */ |
| |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9 1 |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE /* nothing */ |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE_PUSH /* nothing */ |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE_POP /* nothing */ |
| |
| # define _LIBCPP_INTRODUCED_IN_LLVM_4 1 |
| # define _LIBCPP_INTRODUCED_IN_LLVM_4_ATTRIBUTE /* nothing */ |
| |
| #elif defined(__APPLE__) |
| |
| // clang-format off |
| |
| // LLVM 20 |
| // TODO: Fill this in |
| # define _LIBCPP_INTRODUCED_IN_LLVM_20 0 |
| # define _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE __attribute__((unavailable)) |
| |
| // LLVM 19 |
| // TODO: Fill this in |
| # define _LIBCPP_INTRODUCED_IN_LLVM_19 0 |
| # define _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE __attribute__((unavailable)) |
| |
| // 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__ < 130400) || \ |
| (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 160500) || \ |
| (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 160500) || \ |
| (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 90500) || \ |
| (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 = 13.4))) \ |
| __attribute__((availability(ios, strict, introduced = 16.5))) \ |
| __attribute__((availability(tvos, strict, introduced = 16.5))) \ |
| __attribute__((availability(watchos, strict, introduced = 9.5))) \ |
| __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))) |
| |
| // LLVM 11 |
| # 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__ < 140000) || \ |
| (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 140000) || \ |
| (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 70000) |
| # define _LIBCPP_INTRODUCED_IN_LLVM_11 0 |
| # else |
| # define _LIBCPP_INTRODUCED_IN_LLVM_11 1 |
| # endif |
| # define _LIBCPP_INTRODUCED_IN_LLVM_11_ATTRIBUTE \ |
| __attribute__((availability(macos, strict, introduced = 11.0))) \ |
| __attribute__((availability(ios, strict, introduced = 14.0))) \ |
| __attribute__((availability(tvos, strict, introduced = 14.0))) \ |
| __attribute__((availability(watchos, strict, introduced = 7.0))) |
| |
| // LLVM 9 |
| # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) || \ |
| (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 130000) || \ |
| (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 130000) || \ |
| (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 60000) |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9 0 |
| # else |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9 1 |
| # endif |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE \ |
| __attribute__((availability(macos, strict, introduced = 10.15))) \ |
| __attribute__((availability(ios, strict, introduced = 13.0))) \ |
| __attribute__((availability(tvos, strict, introduced = 13.0))) \ |
| __attribute__((availability(watchos, strict, introduced = 6.0))) |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE_PUSH \ |
| _Pragma("clang attribute push(__attribute__((availability(macos,strict,introduced=10.15))), apply_to=any(function,record))") \ |
| _Pragma("clang attribute push(__attribute__((availability(ios,strict,introduced=13.0))), apply_to=any(function,record))") \ |
| _Pragma("clang attribute push(__attribute__((availability(tvos,strict,introduced=13.0))), apply_to=any(function,record))") \ |
| _Pragma("clang attribute push(__attribute__((availability(watchos,strict,introduced=6.0))), apply_to=any(function,record))") |
| # define _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE_POP \ |
| _Pragma("clang attribute pop") \ |
| _Pragma("clang attribute pop") \ |
| _Pragma("clang attribute pop") \ |
| _Pragma("clang attribute pop") |
| |
| // LLVM 4 |
| # if defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000 |
| # define _LIBCPP_INTRODUCED_IN_LLVM_4 0 |
| # else |
| # define _LIBCPP_INTRODUCED_IN_LLVM_4 1 |
| # endif |
| # define _LIBCPP_INTRODUCED_IN_LLVM_4_ATTRIBUTE __attribute__((availability(watchos, strict, introduced = 5.0))) |
| |
| // clang-format on |
| |
| #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 |
| |
| // These macros control the availability of std::bad_optional_access and |
| // other exception types. These were put in the shared library to prevent |
| // code bloat from every user program defining the vtable for these exception |
| // types. |
| // |
| // Note that when exceptions are disabled, the methods that normally throw |
| // these exceptions can be used even on older deployment targets, but those |
| // methods will abort instead of throwing. |
| #define _LIBCPP_AVAILABILITY_HAS_BAD_OPTIONAL_ACCESS _LIBCPP_INTRODUCED_IN_LLVM_4 |
| #define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS _LIBCPP_INTRODUCED_IN_LLVM_4_ATTRIBUTE |
| |
| #define _LIBCPP_AVAILABILITY_HAS_BAD_VARIANT_ACCESS _LIBCPP_INTRODUCED_IN_LLVM_4 |
| #define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS _LIBCPP_INTRODUCED_IN_LLVM_4_ATTRIBUTE |
| |
| #define _LIBCPP_AVAILABILITY_HAS_BAD_ANY_CAST _LIBCPP_INTRODUCED_IN_LLVM_4 |
| #define _LIBCPP_AVAILABILITY_BAD_ANY_CAST _LIBCPP_INTRODUCED_IN_LLVM_4_ATTRIBUTE |
| |
| // These macros control the availability of all parts of <filesystem> that |
| // depend on something in the dylib. |
| #define _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY _LIBCPP_INTRODUCED_IN_LLVM_9 |
| #define _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE |
| #define _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE_PUSH |
| #define _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_POP _LIBCPP_INTRODUCED_IN_LLVM_9_ATTRIBUTE_POP |
| |
| // This controls the availability of the C++20 synchronization library, |
| // which requires shared library support for various operations |
| // (see libcxx/src/atomic.cpp). This includes <barier>, <latch>, |
| // <semaphore>, and notification functions on std::atomic. |
| #define _LIBCPP_AVAILABILITY_HAS_SYNC _LIBCPP_INTRODUCED_IN_LLVM_11 |
| #define _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INTRODUCED_IN_LLVM_11_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 |
| |
| // 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 |
| |
| // 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 the C++17 std::pmr library, |
| // which is implemented in large part in the built library. |
| // |
| // TODO: Enable std::pmr markup once https://github.com/llvm/llvm-project/issues/40340 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 |
| |
| // 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 C++23 <print>, which |
| // has a dependency on the built library (it needs access to |
| // the underlying buffer types of std::cout, std::cerr, and std::clog. |
| #define _LIBCPP_AVAILABILITY_HAS_PRINT _LIBCPP_INTRODUCED_IN_LLVM_18 |
| #define _LIBCPP_AVAILABILITY_PRINT _LIBCPP_INTRODUCED_IN_LLVM_18_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 |
| |
| // 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 |
| |
| // Define availability attributes that depend on _LIBCPP_HAS_EXCEPTIONS. |
| // Those are defined in terms of the availability attributes above, and |
| // should not be vendor-specific. |
| #if !_LIBCPP_HAS_EXCEPTIONS |
| # define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST |
| # define _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS |
| # define _LIBCPP_AVAILABILITY_THROW_BAD_VARIANT_ACCESS |
| #else |
| # define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST _LIBCPP_AVAILABILITY_BAD_ANY_CAST |
| # define _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS |
| # define _LIBCPP_AVAILABILITY_THROW_BAD_VARIANT_ACCESS _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS |
| #endif |
| |
| // Define availability attributes that depend on both |
| // _LIBCPP_HAS_EXCEPTIONS and _LIBCPP_HAS_RTTI. |
| #if !_LIBCPP_HAS_EXCEPTIONS || !_LIBCPP_HAS_RTTI |
| # undef _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION |
| # undef _LIBCPP_AVAILABILITY_INIT_PRIMARY_EXCEPTION |
| # define _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION 0 |
| # define _LIBCPP_AVAILABILITY_INIT_PRIMARY_EXCEPTION |
| #endif |
| |
| #endif // _LIBCPP___CONFIGURATION_AVAILABILITY_H |
