[PATCH] D137724: [CMake] Warn when the version is older than 3.20.0.

[Louis Dionne via Phabricator via cfe-commits]

ldionne added a comment.

LGTM (sorry, it looks like I approved on behalf of all libc++ vendors but that wasn't my intention).


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137724/new/

https://reviews.llvm.org/D137724