[flang] [clang] [flang][Driver] Support -pthread in the frontend (PR #77360)

[Tarun Prabhu via cfe-commits]

tarunprabhu wrote:

> [nit] Note that the test that you've added will run on any platform. Unless that's referring to something else?

That was only highlighting that I have not tested this on AArch64 or Windows. 

Could someone test this on AArch64 and/or Windows just to make sure that it passes there?

https://github.com/llvm/llvm-project/pull/77360