[clang] [flang][Driver] Support -rpath, -shared, and -static in the frontend (PR #66702)

[David Truby via cfe-commits]

DavidTruby wrote:

Sorry I haven’t had a chance to look at this yet but I can help you resolve the Windows issues here. 

Windows does support static libraries and that’s the default for the runtime at the moment, I’ve not actually tried linking the flang runtime dynamically on Windows so that may be the issue. There’s an additional hurdle on Windows as well that libraries statically or dynamically linked against libc are not ABI compatible, so I’m not sure how these flags might interact with that without taking a look

https://github.com/llvm/llvm-project/pull/66702