linux-kernel - Re: [PATCH 0/6] kbuild: rust: add `RUSTC_VERSION` and reconfig/rebuild support

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Message-ID: <CAH5fLgh9Moq_9M+zMu300ohK=mPqkLyS6cpQ6An2Q3THCPFjaA@mail.gmail.com>
Date: Mon, 19 Aug 2024 09:28:42 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Alex Gaynor <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>, 
	Masahiro Yamada <masahiroy@...nel.org>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	rust-for-linux@...r.kernel.org, Nathan Chancellor <nathan@...nel.org>, 
	Nicolas Schier <nicolas@...sle.eu>, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: Re: [PATCH 0/6] kbuild: rust: add `RUSTC_VERSION` and
 reconfig/rebuild support

On Fri, Aug 9, 2024 at 12:12 AM Miguel Ojeda <ojeda@...nel.org> wrote:
>
> Hi all,
>
> This series introduces `RUSTC_VERSION` support, which is needed for
> several patch series getting upstreamed, and it will be increasingly
> useful as we now support several Rust compiler (and `bindgen`) versions.
> Later on, we will likely introduce other macros, such as
> `rustc-min-version`.
>
> In addition, the series introduces automatic reconfiguration and rebuild
> based on `RUSTC_VERSION_TEXT`, to mimic the C side, which is also good
> to have now that we support several versions.
>
> It is based on top of the current `rust-fixes`, since there are a couple
> pending changes to the version text Kconfig symbols that will be sent to
> Linus soon for an -rc.
>
> Cheers,
> Miguel

I tested this together with Rust Binder. I also ran this patchset
through Android's CI setup to verify that it works in builds with
CONFIG_RUST disabled. It passes both with and without a Rust compiler
available to the build system.

Tested-by: Alice Ryhl <aliceryhl@...gle.com>

I'm happy to rerun these tests for new versions.

Alice