mirror of
https://codeberg.org/ziglang/zig.git
synced 2026-04-26 13:01:34 +03:00
Alex Rønne Petersen
315 lines
20 KiB
C++
Vendored
315 lines
20 KiB
C++
Vendored
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___CONFIGURATION_AVAILABILITY_H
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#define _LIBCPP___CONFIGURATION_AVAILABILITY_H
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#include <__configuration/compiler.h>
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#include <__configuration/language.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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// This file defines a framework that can be used by vendors to encode the version of an operating system that various
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// features of libc++ has been shipped in. This is primarily intended to allow safely deploying an executable built with
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// a new version of the library on a platform containing an older version of the built library.
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// Detailed documentation for this can be found at https://libcxx.llvm.org/VendorDocumentation.html#availability-markup
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// Availability markup is disabled when building the library, or when a non-Clang
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// compiler is used because only Clang supports the necessary attributes.
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//
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// We also allow users to force-disable availability markup via the `_LIBCPP_DISABLE_AVAILABILITY`
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// macro because that is the only way to work around a Clang bug related to availability
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// attributes: https://llvm.org/PR134151.
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// Once that bug has been fixed, we should remove the macro.
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#if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCXXABI_BUILDING_LIBRARY) || \
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!defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_DISABLE_AVAILABILITY)
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# undef _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS
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# define _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS 0
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#endif
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// When availability annotations are disabled, we take for granted that features introduced
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// in all versions of the library are available.
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#if !_LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS
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# define _LIBCPP_INTRODUCED_IN_LLVM_22 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_22_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_21 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_21_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_20 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_19 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_18 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_16 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_16_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_15 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_14 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_14_ATTRIBUTE /* nothing */
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# define _LIBCPP_INTRODUCED_IN_LLVM_12 1
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# define _LIBCPP_INTRODUCED_IN_LLVM_12_ATTRIBUTE /* nothing */
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#elif defined(__APPLE__)
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// clang-format off
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// LLVM 22
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// TODO: Fill this in
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# define _LIBCPP_INTRODUCED_IN_LLVM_22 0
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# define _LIBCPP_INTRODUCED_IN_LLVM_22_ATTRIBUTE __attribute__((unavailable))
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// LLVM 21
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// TODO: Fill this in
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# define _LIBCPP_INTRODUCED_IN_LLVM_21 0
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# define _LIBCPP_INTRODUCED_IN_LLVM_21_ATTRIBUTE __attribute__((unavailable))
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// LLVM 20
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//
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// Note that versions for most Apple OSes were bumped forward and aligned in that release.
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 260000) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 260000) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 260000) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 260000) || \
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(defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 100000)
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# define _LIBCPP_INTRODUCED_IN_LLVM_20 0
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# else
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# define _LIBCPP_INTRODUCED_IN_LLVM_20 1
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# endif
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# define _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE \
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__attribute__((availability(macos, strict, introduced = 26.0))) \
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__attribute__((availability(ios, strict, introduced = 26.0))) \
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__attribute__((availability(tvos, strict, introduced = 26.0))) \
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__attribute__((availability(watchos, strict, introduced = 26.0))) \
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__attribute__((availability(bridgeos, strict, introduced = 10.0)))
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// LLVM 19
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 150400) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 180400) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 180400) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 110400) || \
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(defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 90400)
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# define _LIBCPP_INTRODUCED_IN_LLVM_19 0
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# else
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# define _LIBCPP_INTRODUCED_IN_LLVM_19 1
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# endif
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# define _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE \
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__attribute__((availability(macos, strict, introduced = 15.4))) \
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__attribute__((availability(ios, strict, introduced = 18.4))) \
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__attribute__((availability(tvos, strict, introduced = 18.4))) \
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__attribute__((availability(watchos, strict, introduced = 11.4))) \
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__attribute__((availability(bridgeos, strict, introduced = 9.4)))
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// LLVM 18
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 150000) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 180000) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 180000) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 110000) || \
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(defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 90000) || \
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(defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 240000)
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# define _LIBCPP_INTRODUCED_IN_LLVM_18 0
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# else
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# define _LIBCPP_INTRODUCED_IN_LLVM_18 1
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# endif
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# define _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE \
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__attribute__((availability(macos, strict, introduced = 15.0))) \
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__attribute__((availability(ios, strict, introduced = 18.0))) \
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__attribute__((availability(tvos, strict, introduced = 18.0))) \
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__attribute__((availability(watchos, strict, introduced = 11.0))) \
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__attribute__((availability(bridgeos, strict, introduced = 9.0))) \
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__attribute__((availability(driverkit, strict, introduced = 24.0)))
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// LLVM 16
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 140000) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 170000) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 170000) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 100000) || \
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(defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 80000) || \
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(defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 230000)
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# define _LIBCPP_INTRODUCED_IN_LLVM_16 0
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# else
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# define _LIBCPP_INTRODUCED_IN_LLVM_16 1
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# endif
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# define _LIBCPP_INTRODUCED_IN_LLVM_16_ATTRIBUTE \
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__attribute__((availability(macos, strict, introduced = 14.0))) \
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__attribute__((availability(ios, strict, introduced = 17.0))) \
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__attribute__((availability(tvos, strict, introduced = 17.0))) \
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__attribute__((availability(watchos, strict, introduced = 10.0))) \
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__attribute__((availability(bridgeos, strict, introduced = 8.0))) \
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__attribute__((availability(driverkit, strict, introduced = 23.0)))
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// LLVM 15
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 130300) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 160300) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 160300) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 90300) || \
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(defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 70500) || \
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(defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 220400)
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# define _LIBCPP_INTRODUCED_IN_LLVM_15 0
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# else
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# define _LIBCPP_INTRODUCED_IN_LLVM_15 1
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# endif
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# define _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE \
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__attribute__((availability(macos, strict, introduced = 13.3))) \
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__attribute__((availability(ios, strict, introduced = 16.3))) \
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__attribute__((availability(tvos, strict, introduced = 16.3))) \
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__attribute__((availability(watchos, strict, introduced = 9.3))) \
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__attribute__((availability(bridgeos, strict, introduced = 7.5))) \
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__attribute__((availability(driverkit, strict, introduced = 22.4)))
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// LLVM 14
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# define _LIBCPP_INTRODUCED_IN_LLVM_14 _LIBCPP_INTRODUCED_IN_LLVM_15
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# define _LIBCPP_INTRODUCED_IN_LLVM_14_ATTRIBUTE _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE
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// LLVM 12
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 120300) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 150300) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 150300) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 80300) || \
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(defined(__ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_BRIDGE_OS_VERSION_MIN_REQUIRED__ < 60000) || \
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(defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 210300)
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# define _LIBCPP_INTRODUCED_IN_LLVM_12 0
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# else
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# define _LIBCPP_INTRODUCED_IN_LLVM_12 1
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# endif
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# define _LIBCPP_INTRODUCED_IN_LLVM_12_ATTRIBUTE \
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__attribute__((availability(macos, strict, introduced = 12.3))) \
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__attribute__((availability(ios, strict, introduced = 15.3))) \
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__attribute__((availability(tvos, strict, introduced = 15.3))) \
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__attribute__((availability(watchos, strict, introduced = 8.3))) \
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__attribute__((availability(bridgeos, strict, introduced = 6.0))) \
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__attribute__((availability(driverkit, strict, introduced = 21.3)))
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# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 110000) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 150000) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 150000) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 80000) || \
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(defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 200000)
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# warning "The selected platform is no longer supported by libc++."
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# endif
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#else
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// ...New vendors can add availability markup here...
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# error \
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"It looks like you're trying to enable vendor availability markup, but you haven't defined the corresponding macros yet!"
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#endif
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// This controls the availability of new implementation of std::atomic's
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// wait, notify_one and notify_all. The new implementation uses
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// the native atomic wait/notify operations on platforms that support them
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// based on the size of the atomic type, instead of the type itself.
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#define _LIBCPP_AVAILABILITY_HAS_NEW_SYNC _LIBCPP_INTRODUCED_IN_LLVM_22
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#define _LIBCPP_AVAILABILITY_NEW_SYNC _LIBCPP_INTRODUCED_IN_LLVM_22_ATTRIBUTE
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// Enable additional explicit instantiations of iostreams components. This
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// reduces the number of weak definitions generated in programs that use
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// iostreams by providing a single strong definition in the shared library.
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//
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// TODO: Enable additional explicit instantiations on GCC once it supports exclude_from_explicit_instantiation,
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// or once libc++ doesn't use the attribute anymore.
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// TODO: Enable them on Windows once https://llvm.org/PR41018 has been fixed.
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#if !defined(_LIBCPP_COMPILER_GCC) && !defined(_WIN32)
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# define _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 _LIBCPP_INTRODUCED_IN_LLVM_12
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#else
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# define _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 0
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#endif
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// This controls the availability of floating-point std::to_chars functions.
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// These overloads were added later than the integer overloads.
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#define _LIBCPP_AVAILABILITY_HAS_TO_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_14
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#define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_14_ATTRIBUTE
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// This controls whether the library claims to provide a default verbose
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// termination function, and consequently whether the headers will try
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// to use it when the mechanism isn't overriden at compile-time.
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#define _LIBCPP_AVAILABILITY_HAS_VERBOSE_ABORT _LIBCPP_INTRODUCED_IN_LLVM_15
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#define _LIBCPP_AVAILABILITY_VERBOSE_ABORT _LIBCPP_INTRODUCED_IN_LLVM_15_ATTRIBUTE
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// This controls the availability of the C++17 std::pmr library,
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// which is implemented in large part in the built library.
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//
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// TODO: Enable std::pmr markup once https://llvm.org/PR40340 has been fixed
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// Until then, it is possible for folks to try to use `std::pmr` when back-deploying to targets that don't support
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// 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
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// use availability annotations until that bug has been fixed.
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#define _LIBCPP_AVAILABILITY_HAS_PMR _LIBCPP_INTRODUCED_IN_LLVM_16
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#define _LIBCPP_AVAILABILITY_PMR
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// These macros controls the availability of __cxa_init_primary_exception
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// in the built library, which std::make_exception_ptr might use
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// (see libcxx/include/__exception/exception_ptr.h).
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#define _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION _LIBCPP_INTRODUCED_IN_LLVM_18
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#define _LIBCPP_AVAILABILITY_INIT_PRIMARY_EXCEPTION _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE
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// This controls the availability of C++23 <print>, which
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// has a dependency on the built library (it needs access to
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// the underlying buffer types of std::cout, std::cerr, and std::clog.
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#define _LIBCPP_AVAILABILITY_HAS_PRINT _LIBCPP_INTRODUCED_IN_LLVM_18
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#define _LIBCPP_AVAILABILITY_PRINT _LIBCPP_INTRODUCED_IN_LLVM_18_ATTRIBUTE
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// This controls the availability of the C++20 time zone database.
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// The parser code is built in the library.
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#define _LIBCPP_AVAILABILITY_HAS_TZDB _LIBCPP_INTRODUCED_IN_LLVM_19
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#define _LIBCPP_AVAILABILITY_TZDB _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE
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// These macros determine whether we assume that std::bad_function_call and
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// std::bad_expected_access provide a key function in the dylib. This allows
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// centralizing their vtable and typeinfo instead of having all TUs provide
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// a weak definition that then gets deduplicated.
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#define _LIBCPP_AVAILABILITY_HAS_BAD_FUNCTION_CALL_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19
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#define _LIBCPP_AVAILABILITY_BAD_FUNCTION_CALL_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE
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#define _LIBCPP_AVAILABILITY_HAS_BAD_EXPECTED_ACCESS_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19
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#define _LIBCPP_AVAILABILITY_BAD_EXPECTED_ACCESS_KEY_FUNCTION _LIBCPP_INTRODUCED_IN_LLVM_19_ATTRIBUTE
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// This controls the availability of floating-point std::from_chars functions.
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// These overloads were added later than the integer overloads.
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#define _LIBCPP_AVAILABILITY_HAS_FROM_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_20
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#define _LIBCPP_AVAILABILITY_FROM_CHARS_FLOATING_POINT _LIBCPP_INTRODUCED_IN_LLVM_20_ATTRIBUTE
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// This controls whether `std::__hash_memory` is available in the dylib, which
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// is used for some `std::hash` specializations.
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#define _LIBCPP_AVAILABILITY_HAS_HASH_MEMORY _LIBCPP_INTRODUCED_IN_LLVM_21
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// No attribute, since we've had hash in the headers before
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// This controls whether we provide a message for `bad_function_call::what()` that specific to `std::bad_function_call`.
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// See https://wg21.link/LWG2233. This requires `std::bad_function_call::what()` to be available in the dylib.
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#define _LIBCPP_AVAILABILITY_HAS_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE _LIBCPP_INTRODUCED_IN_LLVM_21
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// No attribute, since we've had bad_function_call::what() in the headers before
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// Define availability attributes that depend on both
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// _LIBCPP_HAS_EXCEPTIONS and _LIBCPP_HAS_RTTI.
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#if !_LIBCPP_HAS_EXCEPTIONS || !_LIBCPP_HAS_RTTI
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# undef _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION
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# undef _LIBCPP_AVAILABILITY_INIT_PRIMARY_EXCEPTION
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# define _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION 0
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# define _LIBCPP_AVAILABILITY_INIT_PRIMARY_EXCEPTION
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#endif
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// Only define a bunch of symbols in the dylib if we need to be compatible with LLVM 7 headers or older
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# if defined(_LIBCPP_BUILDING_LIBRARY) && _LIBCPP_AVAILABILITY_MINIMUM_HEADER_VERSION < 8
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# define _LIBCPP_HIDE_FROM_ABI_SINCE_LLVM8
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# else
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# define _LIBCPP_HIDE_FROM_ABI_SINCE_LLVM8 _LIBCPP_HIDE_FROM_ABI
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# endif
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#endif // _LIBCPP___CONFIGURATION_AVAILABILITY_H
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