[Concurrency] Add availability to Concurrency APIs. #36702
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This allows programs to target older OSes while using Concurrency behind an availability check. When targeting older OSes, the symbols are weak-linked and the compiler will require the use of Concurrency features to be guarded by an availability check. rdar://75850003
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@swift-ci please test |
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Build failed |
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@swift-ci please test |
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Build failed |
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Only macOS failures are unrelated LLDB ones. Merging. |
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This allows programs to target older OSes while using Concurrency behind an availability check. When targeting older OSes, the symbols are weak-linked and the compiler will require the use of Concurrency features to be guarded by an availability check.
rdar://75850003