[libc-commits] [libc] [libc] Implement BSD extensions in <err.h> (PR #199055)

[Michael Jones via libc-commits]

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michaelrj-google wrote:

ideally each function would have its own test file. That ensures that functions are still tested even if some of them are disabled on a target.

https://github.com/llvm/llvm-project/pull/199055