[PATCH] D65045: [CMake] LLVM_EXTERNAL_<proj>_SOURCE_DIR should be adjustable.

[Yuanfang Chen via Phabricator via llvm-commits]

ychen added a comment.

In D65045#1594693 <https://reviews.llvm.org/D65045#1594693>, @beanz wrote:

> Adding ‘FORCE’ makes this not user overridable, which is the whole point of this being a cache variable.


Thanks. Add the FORCE flag only when the existing variable is empty.


Repository:
  rG LLVM Github Monorepo

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

https://reviews.llvm.org/D65045