[flang-commits] [flang] [flang] Make lto-bc.f90 unsupported on Darwin (PR #171693)

[Leandro Lupori via flang-commits]

luporl wrote:

> Is ThinLTO not supported on Darwin?

I don't know, but I see this warning on Darwin:
```
flang-22: warning: the option '-flto=thin' is a work in progress
```

And the `"ThinLTO"` string doesn't appear in the output of any RUN command.

https://github.com/llvm/llvm-project/pull/171693