[PATCH] D25093: [libcxx] [cmake] Allow testing against installed LLVM with no sources

[Michał Górny via cfe-commits]

mgorny added a comment.

Combined with https://reviews.llvm.org/D25076 (on llvm), this lets me run libcxx test suite on top of installed LLVM+lit, without LLVM sources.


https://reviews.llvm.org/D25093