[flang-commits] [flang] [flang] Fix flang tests on MacOS (PR #70811)

[Leandro Lupori via flang-commits]

luporl wrote:

Thank you for the review! The last commits should address all comments. If not, please "unresolve" the conversations.

I've also marked `flang/test/Driver/ctofortran.f90` as unsupported, because both clang and flang fails to build binaries, similar to what happened with `flang/test/Runtime/no-cpp-dep.c`. It would be easy to add the correct `-isysroot` flag to clang, but flang still doesn't support this flag.

https://github.com/llvm/llvm-project/pull/70811