Ensure the ObjectiveC module is visible to Discovery.swift#933
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With recent work to rewrite our C++ code in Swift, we've wound up not including any Objective-C headers in `_TestingInternals`, but they are included transitively on some Apple platforms including macOS. Ensure the `ObjectiveC` module is included in Discovery.swift when available so that platforms that don't transitively include the libobjc headers can see (in particular) the `objc_addLoadImageFunc()` function.
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stmontgomery
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Jan 28, 2025
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With recent work to rewrite our C++ code in Swift, we've wound up not including any Objective-C headers in
_TestingInternals, but they are included transitively on some Apple platforms including macOS. Ensure theObjectiveCmodule is included in Discovery.swift when available so that platforms that don't transitively include the libobjc headers can see (in particular) theobjc_addLoadImageFunc()function.Checklist: