mirror of
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5b813f1a2a
Prior to this change we would assume the ABI for Apple targets to be GNU which could result in subtle errors in LLVM emitting calls to non-existent system libc provided functions such as `_sincosf` which is a GNU extension and as such is not provided by macOS for example. This would result in linker errors where the linker would not be able to find the said symbol in `libSystem.tbd`. With this change, we now correctly identify macOS (and other Apple platforms) as having ABI `unknown` which translates to unspecified in LLVM under-the-hood: ``` // main.ll target triple = "aarch64-unknown-macos-unknown" ``` Note however that we never suffix the target OS with target version such as `macos11` or `macos12` which means we fail to instruct LLVM of potential optimisations provided by the OS such as the availability of function `___sincosf_stret`. I suggest we investigate that in a follow-up commit.
280 lines
8.3 KiB
C++
Vendored
280 lines
8.3 KiB
C++
Vendored
/*
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* Copyright (c) 1999-2006 Apple Inc. All Rights Reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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// Copyright 1988-1996 NeXT Software, Inc.
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#ifndef _OBJC_OBJC_API_H_
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#define _OBJC_OBJC_API_H_
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#include <Availability.h>
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#include <AvailabilityMacros.h>
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#include <TargetConditionals.h>
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#include <sys/types.h>
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#ifndef __has_feature
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# define __has_feature(x) 0
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#endif
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#ifndef __has_extension
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# define __has_extension __has_feature
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#endif
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#ifndef __has_attribute
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# define __has_attribute(x) 0
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#endif
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#if !__has_feature(nullability)
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# ifndef _Nullable
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# define _Nullable
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# endif
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# ifndef _Nonnull
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# define _Nonnull
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# endif
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# ifndef _Null_unspecified
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# define _Null_unspecified
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# endif
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#endif
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/*
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* OBJC_API_VERSION 0 or undef: Tiger and earlier API only
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* OBJC_API_VERSION 2: Leopard and later API available
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*/
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#if !defined(OBJC_API_VERSION)
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# if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_5
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# define OBJC_API_VERSION 0
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# else
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# define OBJC_API_VERSION 2
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# endif
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#endif
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/*
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* OBJC_NO_GC 1: GC is not supported
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* OBJC_NO_GC undef: GC is supported. This SDK no longer supports this mode.
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*
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* OBJC_NO_GC_API undef: Libraries must export any symbols that
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* dual-mode code may links to.
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* OBJC_NO_GC_API 1: Libraries need not export GC-related symbols.
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*/
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#if defined(__OBJC_GC__)
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# error Objective-C garbage collection is not supported.
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#elif TARGET_OS_OSX
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/* GC is unsupported. GC API symbols are exported. */
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# define OBJC_NO_GC 1
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# undef OBJC_NO_GC_API
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#else
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/* GC is unsupported. GC API symbols are not exported. */
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# define OBJC_NO_GC 1
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# define OBJC_NO_GC_API 1
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#endif
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/* NS_ENFORCE_NSOBJECT_DESIGNATED_INITIALIZER == 1
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* marks -[NSObject init] as a designated initializer. */
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#if !defined(NS_ENFORCE_NSOBJECT_DESIGNATED_INITIALIZER)
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# define NS_ENFORCE_NSOBJECT_DESIGNATED_INITIALIZER 1
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#endif
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/* OBJC_OLD_DISPATCH_PROTOTYPES == 0 enforces the rule that the dispatch
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* functions must be cast to an appropriate function pointer type. */
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#if !defined(OBJC_OLD_DISPATCH_PROTOTYPES)
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# if __swift__
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// Existing Swift code expects IMP to be Comparable.
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// Variadic IMP is comparable via OpaquePointer; non-variadic IMP isn't.
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# define OBJC_OLD_DISPATCH_PROTOTYPES 1
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# else
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# define OBJC_OLD_DISPATCH_PROTOTYPES 0
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# endif
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#endif
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/* OBJC_AVAILABLE: shorthand for all-OS availability */
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# if !defined(OBJC_AVAILABLE)
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# define OBJC_AVAILABLE(x, i, t, w, b) \
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__OSX_AVAILABLE(x) __IOS_AVAILABLE(i) __TVOS_AVAILABLE(t) \
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__WATCHOS_AVAILABLE(w)
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# endif
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/* OBJC_OSX_DEPRECATED_OTHERS_UNAVAILABLE: Deprecated on OS X,
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* unavailable everywhere else. */
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# if !defined(OBJC_OSX_DEPRECATED_OTHERS_UNAVAILABLE)
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# define OBJC_OSX_DEPRECATED_OTHERS_UNAVAILABLE(_start, _dep, _msg) \
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__OSX_DEPRECATED(_start, _dep, _msg) \
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__IOS_UNAVAILABLE __TVOS_UNAVAILABLE \
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__WATCHOS_UNAVAILABLE
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# endif
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/* OBJC_OSX_AVAILABLE_OTHERS_UNAVAILABLE: Available on OS X,
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* unavailable everywhere else. */
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# if !defined(OBJC_OSX_AVAILABLE_OTHERS_UNAVAILABLE)
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# define OBJC_OSX_AVAILABLE_OTHERS_UNAVAILABLE(vers) \
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__OSX_AVAILABLE(vers) \
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__IOS_UNAVAILABLE __TVOS_UNAVAILABLE \
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__WATCHOS_UNAVAILABLE
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# endif
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/* OBJC_ISA_AVAILABILITY: `isa` will be deprecated or unavailable
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* in the future */
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#if !defined(OBJC_ISA_AVAILABILITY)
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# if __OBJC2__
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# define OBJC_ISA_AVAILABILITY __attribute__((deprecated))
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# else
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# define OBJC_ISA_AVAILABILITY /* still available */
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# endif
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#endif
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/* OBJC2_UNAVAILABLE: unavailable in objc 2.0, deprecated in Leopard */
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#if !defined(OBJC2_UNAVAILABLE)
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# if __OBJC2__
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# define OBJC2_UNAVAILABLE UNAVAILABLE_ATTRIBUTE
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# else
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/* plain C code also falls here, but this is close enough */
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# define OBJC2_UNAVAILABLE \
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__OSX_DEPRECATED(10.5, 10.5, "not available in __OBJC2__") \
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__IOS_DEPRECATED(2.0, 2.0, "not available in __OBJC2__") \
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__TVOS_UNAVAILABLE __WATCHOS_UNAVAILABLE
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# endif
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#endif
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/* OBJC_UNAVAILABLE: unavailable, with a message where supported */
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#if !defined(OBJC_UNAVAILABLE)
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# if __has_extension(attribute_unavailable_with_message)
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# define OBJC_UNAVAILABLE(_msg) __attribute__((unavailable(_msg)))
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# else
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# define OBJC_UNAVAILABLE(_msg) __attribute__((unavailable))
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# endif
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#endif
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/* OBJC_DEPRECATED: deprecated, with a message where supported */
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#if !defined(OBJC_DEPRECATED)
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# if __has_extension(attribute_deprecated_with_message)
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# define OBJC_DEPRECATED(_msg) __attribute__((deprecated(_msg)))
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# else
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# define OBJC_DEPRECATED(_msg) __attribute__((deprecated))
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# endif
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#endif
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/* OBJC_ARC_UNAVAILABLE: unavailable with -fobjc-arc */
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#if !defined(OBJC_ARC_UNAVAILABLE)
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# if __has_feature(objc_arc)
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# define OBJC_ARC_UNAVAILABLE OBJC_UNAVAILABLE("not available in automatic reference counting mode")
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# else
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# define OBJC_ARC_UNAVAILABLE
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# endif
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#endif
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/* OBJC_SWIFT_UNAVAILABLE: unavailable in Swift */
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#if !defined(OBJC_SWIFT_UNAVAILABLE)
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# if __has_feature(attribute_availability_swift)
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# define OBJC_SWIFT_UNAVAILABLE(_msg) __attribute__((availability(swift, unavailable, message=_msg)))
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# else
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# define OBJC_SWIFT_UNAVAILABLE(_msg)
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# endif
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#endif
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/* OBJC_ARM64_UNAVAILABLE: unavailable on arm64 (i.e. stret dispatch) */
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#if !defined(OBJC_ARM64_UNAVAILABLE)
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# if defined(__arm64__)
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# define OBJC_ARM64_UNAVAILABLE OBJC_UNAVAILABLE("not available in arm64")
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# else
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# define OBJC_ARM64_UNAVAILABLE
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# endif
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#endif
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/* OBJC_GC_UNAVAILABLE: unavailable with -fobjc-gc or -fobjc-gc-only */
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#if !defined(OBJC_GC_UNAVAILABLE)
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# define OBJC_GC_UNAVAILABLE
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#endif
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#if !defined(OBJC_EXTERN)
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# if defined(__cplusplus)
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# define OBJC_EXTERN extern "C"
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# else
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# define OBJC_EXTERN extern
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# endif
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#endif
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#if !defined(OBJC_VISIBLE)
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# define OBJC_VISIBLE __attribute__((visibility("default")))
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#endif
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#if !defined(OBJC_EXPORT)
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# define OBJC_EXPORT OBJC_EXTERN OBJC_VISIBLE
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#endif
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#if !defined(OBJC_IMPORT)
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# define OBJC_IMPORT extern
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#endif
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#if !defined(OBJC_ROOT_CLASS)
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# if __has_attribute(objc_root_class)
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# define OBJC_ROOT_CLASS __attribute__((objc_root_class))
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# else
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# define OBJC_ROOT_CLASS
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# endif
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#endif
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#ifndef __DARWIN_NULL
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#define __DARWIN_NULL NULL
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#endif
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#if !defined(OBJC_INLINE)
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# define OBJC_INLINE __inline
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#endif
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// Declares an enum type or option bits type as appropriate for each language.
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#if (__cplusplus && __cplusplus >= 201103L && (__has_extension(cxx_strong_enums) || __has_feature(objc_fixed_enum))) || (!__cplusplus && __has_feature(objc_fixed_enum))
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#define OBJC_ENUM(_type, _name) enum _name : _type _name; enum _name : _type
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#if (__cplusplus)
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#define OBJC_OPTIONS(_type, _name) _type _name; enum : _type
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#else
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#define OBJC_OPTIONS(_type, _name) enum _name : _type _name; enum _name : _type
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#endif
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#else
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#define OBJC_ENUM(_type, _name) _type _name; enum
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#define OBJC_OPTIONS(_type, _name) _type _name; enum
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#endif
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#if !defined(OBJC_RETURNS_RETAINED)
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# if __OBJC__ && __has_attribute(ns_returns_retained)
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# define OBJC_RETURNS_RETAINED __attribute__((ns_returns_retained))
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# else
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# define OBJC_RETURNS_RETAINED
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# endif
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#endif
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#endif |