linux-kernel - Re: [PATCH] Add -fzero-init-padding-bits to bindgen_skip

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Message-ID: <202502060744.6F701A4CBE@keescook>
Date: Thu, 6 Feb 2025 07:45:20 -0800
From: Kees Cook <kees@...nel.org>
To: "Justin M. Forbes" <jforbes@...oraproject.org>
Cc: 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 <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add -fzero-init-padding-bits to bindgen_skip_cflags

On Wed, Jan 29, 2025 at 02:50:02PM -0700, Justin M. Forbes wrote:
> This seems to break the build when building with gcc15.
> 
> Unable to generate bindings: ClangDiagnostic("error: unknown argument: '-fzero-init-padding-bits=all'\n")
> 
> Signed-off-by: Justin M. Forbes <jforbes@...oraproject.org>

Thanks for this! I keep forgetting to keep flags in sync. I wonder if
there is a way to automate some kind of warning for this (even when
CONFIG_RUST=n)?

Reviewed-by: Kees Cook <kees@...nel.org>

Miguel, I see you took this already -- is it planned to land for -rc2?

Thanks!

-Kees

-- 
Kees Cook