Make the back-deployed concurrency dylibs depend only on what's available in older runtimes #39102
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The code that saves/restores the exclusivity checks for tasks was newly introduced into the runtime. Clone that code into the back- deployed version of the runtime.
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@swift-ci please test |
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@swift-ci please build toolchain macOS |
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Build failed |
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@swift-ci please smoke test macOS |
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@swift-ci please build toolchain macOS |
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@swift-ci please test macOS |
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macOS Toolchain Install command |
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The concurrency library has some dependencies on newer Swift runtimes. Break the two immediate dependencies that cause link failures on older OS versions: