[libcxx-commits] [libcxx] [llvm] [libc++] Optionally support filecheck-based tests (PR #165769)

[Louis Dionne via libcxx-commits]

ldionne wrote:

> Drive by comment from a non libc++ contributor, so take my feedback as you will.
> 
> Why install a Python version of FileCheck when we could just install/build actual FileCheck? I'd prefer to avoid external dependencies whenever possible, especially when it's a much less battle tested reimplementation of something that we have in tree.

The problem is that AFAICT, LLVM's `FileCheck` requires configuring the LLVM project as a whole and building a ton of things we don't need for the runtimes. I wouldn't even be surprised if it didn't build on some smaller platforms that we target.

https://github.com/llvm/llvm-project/pull/165769