[PATCH] D65045: [CMake] Allow LLVM_EXTERNAL_<proj>_SOURCE_DIR to be overridden if it is empty.

[Chris Bieneman via Phabricator via llvm-commits]

beanz accepted this revision.
beanz added a comment.
This revision is now accepted and ready to land.

LGTM. At some point (after the mono-repo becomes the source of truth) we need to clean all this up.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D65045/new/

https://reviews.llvm.org/D65045