Bug#947437: flang: Please update to llvm-9

[Sandro Tosi]

> I tried a test build with llvm-8 and -9 and it failed. There have been
> no releases since March 2019,
>
> but there is very active development as flang is being merged into the
> official llvm project.
>
> There have been no tags since, but I will see if I can build/test head
> of tree against llvm-9

has there any progress been achieved in getting flang to build with
llvm-9? currently flang is the last reverse dependency of llvm-7,
which could be removed if flang is ported to llvm-9.

Regards,
Sandro