linux-kernel - Re: Build: arm rustgcc unknown argument '-mno-fdpic'

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Message-ID: <CANiq72mPZ-ik8k+04BarAu26A1=rV_y7GYZHkFnCezW4jpXq+g@mail.gmail.com>
Date: Thu, 24 Apr 2025 19:01:54 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Ben Wolsieffer <ben.wolsieffer@...ring.com>
Cc: Naresh Kamboju <naresh.kamboju@...aro.org>, Miguel Ojeda <ojeda@...nel.org>, 
	Christian Schrrefl <chrisi.schrefl@...il.com>, Russell King <rmk+kernel@...linux.org.uk>, 
	Rudraksha Gupta <guptarud@...il.com>, Alice Ryhl <aliceryhl@...gle.com>, 
	Ard Biesheuvel <ardb@...nel.org>, anders.roxell@...aro.org, arnd@...db.de, 
	dan.carpenter@...aro.org, laura.nao@...labora.com, 
	linux-kernel@...r.kernel.org, lkft-triage@...ts.linaro.org, 
	regressions@...ts.linux.dev, rust-for-linux@...r.kernel.org, 
	torvalds@...ux-foundation.org, Nick Clifton <nickc@...hat.com>, 
	Richard Earnshaw <richard.earnshaw@....com>, Ramana Radhakrishnan <ramanara@...dia.com>
Subject: Re: Build: arm rustgcc unknown argument '-mno-fdpic'

On Thu, Apr 24, 2025 at 3:39 PM Ben Wolsieffer
<ben.wolsieffer@...ring.com> wrote:
>
> -mno-fdpic disables a GCC feature that we don't want for kernel builds.
> clang does not support this feature, so it always behaves as though
> -mno-fdpic is passed. Therefore, it should be fine to mix the two, at
> least as far as FDPIC is concerned.

Great, thanks a lot for confirming it should be all good, very much appreciated!

Naresh: would you like to send the diff as a formal patch since you
already tested it etc.?

Cheers,
Miguel