[clang] [flang] [Flang][Driver] Add -print-resource-dir command line flag to emit Flang's resource directory (PR #90886)

[Andrzej Warzyński via cfe-commits]

banach-space wrote:

> > How does this compare to GFortran and Classic Flang? Anything resembling this flag?
> 
> GFortran does not have it, but Classic Flang does. So, it's closing a gap to Classic Flang here as well.

Do you know the meaning for Classic Flang? Would be great to make "LLVM Flang" consistent with any "prior art". Nice to have ;-)

https://github.com/llvm/llvm-project/pull/90886