llvm 19.1.0

[lukeshingles]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

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Final release of LLVM 19.1.0.

The LIBCXX_PSTL_CPU_BACKEND=libdispatch option in llvm 18 has been renamed to LIBCXX_PSTL_BACKEND in llvm 19. I have also enabled parallel STL (pstl) in libc++ (which shouldn't break anything since it's still hidden behind -fexperimental-library).

[lukeshingles]

Ok, there's apparently a check on the presence of "rc" in the URL. Is there a label that can be applied to bypass that and run the tests, or should I just wait until llvm 19 is final?

[SMillerDev]

Ok, there's apparently a check on the presence of "rc" in the URL. Is there a label that can be applied to bypass that and run the tests, or should I just wait until llvm 19 is final?

https://github.com/Homebrew/homebrew-core/blob/master/audit_exceptions/unstable_allowlist.json governs that check, you can temporarily add this version

[carlocab]

I've opened a PR for mesa at #191606.

@lukeshingles, can you open one for vineyard?