Flang landing in the monorepo

Is the f18 merge just for the fortran front-end? Does that front end use the same libflang as flang? I ask because, last time I checked, libflang still was not buildable on darwin.



Yes, it's just for the frontend at this point. Further development on
everything will happen in llvm-project.

Worth mentioning that the existing llvm build system will not be
affected in any way until patches come which add support for it.


- Peter