linux-kernel - Re: [PATCH] rust: add `rustcheck` make target for check-only builds

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Message-ID: <87bjnei6tn.fsf@kernel.org>
Date: Sat, 13 Sep 2025 19:46:28 +0200
From: Andreas Hindborg <a.hindborg@...nel.org>
To: Onur Özkan <work@...rozkan.dev>,
 rust-for-linux@...r.kernel.org
Cc: ojeda@...nel.org, nathan@...nel.org, nicolas.schier@...ux.dev,
 masahiroy@...nel.org, aliceryhl@...gle.com,
 thomas.weissschuh@...utronix.de, tamird@...il.com,
 linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
 alex.gaynor@...il.com, boqun.feng@...il.com, gary@...yguo.net,
 bjorn3_gh@...tonmail.com, lossin@...nel.org, tmgross@...ch.edu,
 dakr@...nel.org, Onur Özkan <work@...rozkan.dev>
Subject: Re: [PATCH] rust: add `rustcheck` make target for check-only builds

Onur Özkan <work@...rozkan.dev> writes:

> Adds a new `rustcheck` make target to run a check-only build
> similar to `cargo check`. This allows us to verify that the Rust
> sources can build without building/linking final artifacts,
> which speeds up the iteration (a lot) during development.
>
> The target supports the same flags as other Rust build rules, so
> it can also be used with `CLIPPY=1` (e.g., `make LLVM=1 rustcheck
> CLIPPY=1) to run Clippy in a faster way.
>
> Also, unlike `make LLVM=1`, it doesn't compile large amounts of C
> code (on a fresh checkout) when the goal is only to check that
> Rust builds are not broken after some changes.
>

I think this is a good idea! However, it looks like this target only
checks rust code that live in rust/. Can we also check code that lives
elsewhere, like drivers?


Best regards,
Andreas Hindborg