Re: [PATCH 05/18] rust: kbuild: define `procmacro-extension` variable

On Mon, Jun 8, 2026 at 5:10 PM Nicolas Schier <[email protected]> wrote:
>
> Where does the 'libname.%' pattern come from?  Looking at the current
> users of cmd_rustc_procmacro I'd expect a 'lib%' pattern instead.

Here, we want to extract the extension the operating system uses --
this was originally added for macOS build support (Cc Tamir), and is
`.so` in Linux but `.dylib` there (and if I recall correctly, we
couldn't force `rustc` in macOS to use a file with `.so` as the
extension, sadly).

In the commands, however, what we are trying to extract is the name of
the crate instead. So that is why one is `lib%` and the other
`libname.%` (a dummy library name).

Or do you mean something else?

Thanks a lot for the reviews! By the way, I sent a bit ago v2 (it
doesn't change much, so I will pick your tags from here :)

Cheers,
Miguel