[flang-commits] [flang] [flang] Fix failure of regression tests on macOS (PR #151812)

[Tarun Prabhu via flang-commits]

https://github.com/tarunprabhu commented:

How do the clang tests handle this? Is it really necessary to remove `-isysroot` like this? I have very limited experience building on MacOS though, so I'm afraid I cannot offer something more constructive.

https://github.com/llvm/llvm-project/pull/151812