[clang] [llvm] [CMake] Version Darwin dylib identities (PR #189004)

[Steven Wu via cfe-commits]

cachemeifyoucan wrote:

> Rust compiler team member here, but not a bootstrap expert. We generally want to switch from static to dynamic linking of LLVM, but a few days ago I had to revert our second attempt at doing so for macOS. We are currently therefore back at static linking. The first time we broke downstream users like Miri, the second time we broke local bootstrap builds, since different stages of bootstrap then disagreed on whether they wanted a versioned or an unversioned LLVM.

Do you have bug report for those?

https://github.com/llvm/llvm-project/pull/189004