Split libcxx on msvc/other

1 files changed, 273 insertions, 0 deletions

diff --git a/contrib/libs/cxxsupp/libcxxmsvc/include/__availability b/contrib/libs/cxxsupp/libcxxmsvc/include/__availability
new file mode 100644
index 0000000000..12eafee99b
--- /dev/null
+++ b/contrib/libs/cxxsupp/libcxxmsvc/include/__availability
@@ -0,0 +1,273 @@
+// -*- 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___AVAILABILITY
+#define _LIBCPP___AVAILABILITY
+
+#include <__config>
+
+#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 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, a macro should be added below to mark this feature
+// as unavailable. When vendors decide to ship the feature as part of their
+// shared library, they can update the markup appropriately.
+//
+// Furthermore, many features in the standard library have corresponding
+// feature-test macros. When a feature is made unavailable on some deployment
+// target, a macro should be defined to signal that it is unavailable. That
+// macro can then be picked up when feature-test macros are generated (see
+// generate_feature_test_macro_components.py) to make sure that feature-test
+// macros don't announce a feature as being implemented if it has been marked
+// as unavailable.
+//
+// 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
+
+
+// For backwards compatibility, allow users to define _LIBCPP_DISABLE_AVAILABILITY
+// for a while.
+#if defined(_LIBCPP_DISABLE_AVAILABILITY)
+#   if !defined(_LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS)
+#       define _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS
+#   endif
+#endif
+
+// Availability markup is disabled when building the library, or when the compiler
+// doesn't support the proper attributes.
+#if defined(_LIBCPP_BUILDING_LIBRARY) ||                                        \
+    defined(_LIBCXXABI_BUILDING_LIBRARY) ||                                     \
+    !__has_feature(attribute_availability_with_strict) ||                       \
+    !__has_feature(attribute_availability_in_templates) ||                      \
+    !__has_extension(pragma_clang_attribute_external_declaration)
+#   if !defined(_LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS)
+#       define _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS
+#   endif
+#endif
+
+#if defined(_LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS)
+
+    // This controls the availability of std::shared_mutex and std::shared_timed_mutex,
+    // which were added to the dylib later.
+#   define _LIBCPP_AVAILABILITY_SHARED_MUTEX
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_shared_mutex
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_shared_timed_mutex
+
+    // 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.
+#   define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
+#   define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS
+#   define _LIBCPP_AVAILABILITY_BAD_ANY_CAST
+
+    // This controls the availability of std::uncaught_exceptions().
+#   define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS
+
+    // This controls the availability of the sized version of ::operator delete,
+    // which was added to the dylib later.
+#   define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE
+
+    // This controls the availability of the std::future_error exception.
+#   define _LIBCPP_AVAILABILITY_FUTURE_ERROR
+
+    // This controls the availability of std::type_info's vtable.
+    // I can't imagine how using std::type_info can work at all if
+    // this isn't supported.
+#   define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE
+
+    // This controls the availability of std::locale::category members
+    // (e.g. std::locale::collate), which are defined in the dylib.
+#   define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY
+
+    // This controls the availability of atomic operations on std::shared_ptr
+    // (e.g. `std::atomic_store(std::shared_ptr)`), which require a shared
+    // lock table located in the dylib.
+#   define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
+
+    // These macros control the availability of all parts of <filesystem> that
+    // depend on something in the dylib.
+#   define _LIBCPP_AVAILABILITY_FILESYSTEM
+#   define _LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
+#   define _LIBCPP_AVAILABILITY_FILESYSTEM_POP
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_filesystem
+
+    // This controls the availability of std::to_chars.
+#   define _LIBCPP_AVAILABILITY_TO_CHARS
+
+    // This controls the availability of floating-point std::to_chars functions.
+    // These overloads were added later than the integer overloads.
+#   define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT
+
+    // This controls the availability of the C++20 synchronization library,
+    // which requires shared library support for various operations
+    // (see libcxx/src/atomic.cpp).
+#   define _LIBCPP_AVAILABILITY_SYNC
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_atomic_wait
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_barrier
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_latch
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_semaphore
+
+    // This controls the availability of the C++20 format library.
+    // The library is in development and not ABI stable yet. P2216 is
+    // retroactively accepted in C++20. This paper contains ABI breaking
+    // changes.
+#   define _LIBCPP_AVAILABILITY_FORMAT
+// #   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_format
+
+#elif defined(__APPLE__)
+
+#   define _LIBCPP_AVAILABILITY_SHARED_MUTEX                                    \
+        __attribute__((availability(macosx,strict,introduced=10.12)))           \
+        __attribute__((availability(ios,strict,introduced=10.0)))               \
+        __attribute__((availability(tvos,strict,introduced=10.0)))              \
+        __attribute__((availability(watchos,strict,introduced=3.0)))
+#   if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101200) ||    \
+        (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 100000) || \
+        (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 100000) ||         \
+        (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 30000)
+#       define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_shared_mutex
+#       define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_shared_timed_mutex
+#   endif
+
+#   define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS                             \
+        __attribute__((availability(macosx,strict,introduced=10.13)))           \
+        __attribute__((availability(ios,strict,introduced=11.0)))               \
+        __attribute__((availability(tvos,strict,introduced=11.0)))              \
+        __attribute__((availability(watchos,strict,introduced=4.0)))
+#   define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS                              \
+        _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
+#   define _LIBCPP_AVAILABILITY_BAD_ANY_CAST                                    \
+        _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
+
+#   define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS                             \
+        __attribute__((availability(macosx,strict,introduced=10.12)))           \
+        __attribute__((availability(ios,strict,introduced=10.0)))               \
+        __attribute__((availability(tvos,strict,introduced=10.0)))              \
+        __attribute__((availability(watchos,strict,introduced=3.0)))
+
+#   define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE                                \
+        __attribute__((availability(macosx,strict,introduced=10.12)))           \
+        __attribute__((availability(ios,strict,introduced=10.0)))               \
+        __attribute__((availability(tvos,strict,introduced=10.0)))              \
+        __attribute__((availability(watchos,strict,introduced=3.0)))
+
+#   define _LIBCPP_AVAILABILITY_FUTURE_ERROR                                    \
+        __attribute__((availability(ios,strict,introduced=6.0)))
+
+#   define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE                                 \
+        __attribute__((availability(macosx,strict,introduced=10.9)))            \
+        __attribute__((availability(ios,strict,introduced=7.0)))
+
+#   define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY                                 \
+        __attribute__((availability(macosx,strict,introduced=10.9)))            \
+        __attribute__((availability(ios,strict,introduced=7.0)))
+
+#   define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR                               \
+        __attribute__((availability(macosx,strict,introduced=10.9)))            \
+        __attribute__((availability(ios,strict,introduced=7.0)))
+
+#   define _LIBCPP_AVAILABILITY_FILESYSTEM                                      \
+        __attribute__((availability(macosx,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_AVAILABILITY_FILESYSTEM_PUSH                                 \
+        _Pragma("clang attribute push(__attribute__((availability(macosx,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_AVAILABILITY_FILESYSTEM_POP                                  \
+        _Pragma("clang attribute pop")                                          \
+        _Pragma("clang attribute pop")                                          \
+        _Pragma("clang attribute pop")                                          \
+        _Pragma("clang attribute pop")
+#   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_AVAILABILITY_DISABLE_FTM___cpp_lib_filesystem
+#   endif
+
+#   define _LIBCPP_AVAILABILITY_TO_CHARS                                        \
+        _LIBCPP_AVAILABILITY_FILESYSTEM
+
+#   define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT                         \
+        __attribute__((unavailable))
+
+#   define _LIBCPP_AVAILABILITY_SYNC                                            \
+        __attribute__((availability(macosx,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)))
+#   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_AVAILABILITY_DISABLE_FTM___cpp_lib_atomic_wait
+#       define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_barrier
+#       define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_latch
+#       define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_semaphore
+#   endif
+
+#   define _LIBCPP_AVAILABILITY_FORMAT                                          \
+        __attribute__((unavailable))
+#   define _LIBCPP_AVAILABILITY_DISABLE_FTM___cpp_lib_format
+#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
+
+// Define availability attributes that depend on _LIBCPP_NO_EXCEPTIONS.
+// Those are defined in terms of the availability attributes above, and
+// should not be vendor-specific.
+#if defined(_LIBCPP_NO_EXCEPTIONS)
+#   define _LIBCPP_AVAILABILITY_FUTURE
+#   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_FUTURE                    _LIBCPP_AVAILABILITY_FUTURE_ERROR
+#   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
+
+#endif // _LIBCPP___AVAILABILITY