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The _Builtin_float symbols were moved twice, most recently from the OS Darwin library, but previously they were in the embedded @rpath Darwin library. @_originallyDefinedIn doesn't support multiple install names, but it can be replaced with -module-abi-name, and then multiple $ld$previous$ symbols can be used. Update the Platform and Concurrency magic symbols to use $ld$previous$ everywhere. rdar://130107191
89 lines
4.2 KiB
C
89 lines
4.2 KiB
C
//===--- magic-symbols-for-install-name.c - Magic linker directive symbols ===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// A file containing magic symbols that instruct the linker to use a
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// different install name when targeting older OSes. This file gets
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// compiled into all of the libraries that are embedded for backward
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// deployment.
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//
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// This file is specific to the Builtin_float library; there is a matching
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// file for the standard library with the same name.
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//
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//===----------------------------------------------------------------------===//
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#if defined(__APPLE__) && defined(__MACH__) && SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT
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#include <mach-o/loader.h>
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#include <TargetConditionals.h>
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#include "swift/shims/Visibility.h"
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// Builtin_float was split out from the Darwin library in macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0,
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// visionOS 2.0 Prior to macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, Darwin was supported as an
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// embedded library starting in macOS (née OS X) 10.9, iOS 7.0, watchOS 2.0, tvOS 9.0. In order to
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// support back deployment, add a magic symbol so that back deployment will link on Darwin instead, and
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// the embedded version on particularly old deployment targets. On newer OS versions, Darwin re-exports
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// Builtin_float which is where the APIs are implemented.
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// The linker uses a specially formatted symbol to do the back deployment:
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// $ld$previous$<install-name>$<compatibility-version>$<platform>$<start-version>$<end-version>$<symbol-name>$
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// compatibility-version and symbol-name are left off to apply to all library versions and symbols.
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// This symbol isn't a legal C identifier, so it needs to be specified with __asm.
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#define DARWIN_RPATH_PREVIOUS_DIRECTIVE(platform, startVersion, endVersion) \
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SWIFT_RUNTIME_EXPORT const char ld_previous_rpath_ ## platform \
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__asm("$ld$previous$@rpath/libswiftDarwin.dylib$$" __STRING(platform) "$" __STRING(startVersion) "$" __STRING(endVersion) "$$"); \
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const char ld_previous_rpath_ ## platform = 0;
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// Using the __STRING macro is important so that platform gets expanded before being stringified.
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// The versions could just be #version, __STRING is only used for consistency.
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#define DARWIN_PREVIOUS_DIRECTIVE(platform, startVersion, endVersion) \
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SWIFT_RUNTIME_EXPORT const char ld_previous_ ## platform \
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__asm("$ld$previous$/usr/lib/swift/libswiftDarwin.dylib$$" __STRING(platform) "$" __STRING(startVersion) "$" __STRING(endVersion) "$$"); \
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const char ld_previous_ ## platform = 0;
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#if TARGET_OS_OSX || TARGET_OS_MACCATALYST
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_MACOS, 10.9, 10.14.4)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_MACOS, 10.14.4, 15.0)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_MACCATALYST, 13.1, 18.0)
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#elif TARGET_OS_IOS && !TARGET_OS_VISION
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#if TARGET_OS_SIMULATOR
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_IOSSIMULATOR, 7.0, 12.2)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_IOSSIMULATOR, 12.2, 18.0)
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#else
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_IOS, 7.0, 12.2)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_IOS, 12.2, 18.0)
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#endif
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#elif TARGET_OS_WATCH
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#if TARGET_OS_SIMULATOR
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_WATCHOSSIMULATOR, 2.0, 5.2)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_WATCHOSSIMULATOR, 5.2, 11.0)
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#else
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_WATCHOS, 2.0, 5.2)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_WATCHOS, 5.2, 11.0)
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#endif
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#elif TARGET_OS_TV
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#if TARGET_OS_SIMULATOR
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_TVOSSIMULATOR, 9.0, 12.2)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_TVOSSIMULATOR, 12.2, 18.0)
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#else
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DARWIN_RPATH_PREVIOUS_DIRECTIVE(PLATFORM_TVOS, 9.0, 12.2)
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_TVOS, 12.2, 18.0)
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#endif
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#elif TARGET_OS_VISION
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#if TARGET_OS_SIMULATOR
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_VISIONOSSIMULATOR, 1.0, 2.0);
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#else
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DARWIN_PREVIOUS_DIRECTIVE(PLATFORM_VISIONOS, 1.0, 2.0);
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#endif
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#endif
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#endif // defined(__APPLE__) && defined(__MACH__) && SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT
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