[libcxx-commits] [libcxx] [libc++] Check zdump availability through executor (PR #216476)

[via libcxx-commits]

zhangweize9-cyber wrote:

If you're simply checking if `zdump` executes correctly in the terminal, writing `exec` directly will result in an error. You need to write it like this:

```python
import shutil
when = lambda cfg: shutil.which("zdump") is None
```

https://github.com/llvm/llvm-project/pull/216476