Re: [PATCH 04/13] Kbuild: Rust support

[Miguel Ojeda]

On Sat, Apr 17, 2021 at 6:24 AM Willy Tarreau <w@xxxxxx> wrote:
>
> My concern was to know what field to look at to reliably detect an error
> from the C side after a sequence doing C -> Rust -> C when the inner C
> code uses NULL to mark an error and the upper C code uses NULL as a valid
> value and needs to look at an error code instead to rebuild a result. But

I see, thanks for clarifying. I don't think we want to change anything
on either of the C sides (at least for the foreseeable future). So the
Rust code in-between must respect whatever conventions both C sides
already use, even if they happen to be different on each side.

Thus the C side will not know there was a `Result` inside the Rust
side and so it does not need to worry about which field to look at.

Cheers,
Miguel