linux-kernel - Re: [PATCH v4 3/4] rust: add a Kconfig function to test for support of bindgen options

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Message-ID: <CANiq72nDpBodFh5Zqy2p9jwWyfAiY6KcEEyugHeMDEmOR6Rogw@mail.gmail.com>
Date: Mon, 24 Nov 2025 04:08:36 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Asuna Yang <spriteovo@...il.com>
Cc: Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas.schier@...ux.dev>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
	Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
	Nicolas Schier <nsc@...nel.org>, Jonathan Corbet <corbet@....net>, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Vivian Wang <wangruikang@...as.ac.cn>, Han Gao <rabenda.cn@...il.com>, 
	Jason Montleon <jmontleo@...hat.com>, Conor Dooley <conor@...nel.org>, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	llvm@...ts.linux.dev, linux-doc@...r.kernel.org, 
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v4 3/4] rust: add a Kconfig function to test for support
 of bindgen options

On Mon, Nov 24, 2025 at 3:42 AM Asuna Yang <spriteovo@...il.com> wrote:
>
> I will separate them into two functions in the next revision,
> `bindgen-option` and `bindgen-backend-option` (or `bindgen-cc-option`?
> Which one do you prefer?).

If we don't need `bindgen-option` (the normal one I mean) so far,
perhaps we should skip it. On the other hand, `rustc-option-yn` is
there and is not used either (it was added for consistency). Up to the
Kbuild team, I guess.

As for the name, no strong preference. `bindgen-backend-option` sounds
good, but `bindgen-cc-option` is more consistent with `cc-option` and
probably easier to understand for people new to `bindgen`, and anyway
the flags we pass there wouldn't make sense if the backend is not a C
compiler.

Thanks!

Cheers,
Miguel