linux-kernel - Re: [PATCH 09/18] rust: proc-macro2: enable support in kbuild

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Message-ID: <CANiq72mGYKYZmQ8g5AbXCsRS+WPxbeaSyngR69jsEpY8akouog@mail.gmail.com>
Date: Mon, 10 Nov 2025 14:28:06 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Gary Guo <gary@...yguo.net>
Cc: Alice Ryhl <aliceryhl@...gle.com>, Miguel Ojeda <ojeda@...nel.org>, 
	Alex Gaynor <alex.gaynor@...il.com>, Nathan Chancellor <nathan@...nel.org>, 
	Nicolas Schier <nicolas@...sle.eu>, Boqun Feng <boqun.feng@...il.com>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, rust-for-linux@...r.kernel.org, 
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
	patches@...ts.linux.dev
Subject: Re: [PATCH 09/18] rust: proc-macro2: enable support in kbuild

On Mon, Nov 10, 2025 at 2:10 PM Gary Guo <gary@...yguo.net> wrote:
>
> So I think the implementation here is sensible. I believe Miguel's
> patch is also pretty much replicating the logic in proc-macro2's
> build.rs.

Exactly, I was essentially following what upstream does for stable compilers.

(More generally, even if a feature may work, if upstream doesn't
usually test "older nightlies", then I wonder if we should enable such
combinations/setups anyway, unless we need them for a particular
reason).

Cheers,
Miguel