[libc-commits] [libc] [libc][NFC] Add few options to allow users to skip building and running some tests. (PR #199474)

[via libc-commits]

lntue wrote:

> What's the change from check-libc to check-libc-lit for?

To provide a simple target to "only build all the tests without running them", and I want to try to build the tests for "non-testable targets" in our CIs: https://github.com/llvm/llvm-project/blob/main/.github/workflows/libc-fullbuild-tests.yml#L191 , and to include GPU build-only CIs after.

https://github.com/llvm/llvm-project/pull/199474