linux-kernel - Re: [PATCH] Enable '-Werror' by default for all kernel builds

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Date:   Thu, 9 Sep 2021 09:46:25 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Marco Elver <elver@...gle.com>, Guenter Roeck <linux@...ck-us.net>,
        Nathan Chancellor <nathan@...nel.org>,
        Arnd Bergmann <arnd@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        llvm@...ts.linux.dev, Nick Desaulniers <ndesaulniers@...gle.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>, amd-gfx@...ts.freedesktop.org
Subject: Re: [PATCH] Enable '-Werror' by default for all kernel builds

On Wed, Sep 8, 2021 at 10:59 PM Christoph Hellwig <hch@...radead.org> wrote:
>
> While we're at it, with -Werror something like this is really futile:

Yeah, I'm thinking we could do

 -Wno-error=cpp

to at least allow the cpp warnings to come through without being fatal.

Because while they can be annoying too, they are most definitely under
our direct control, so..

I didn't actually test that, but I think it should work.

That said, maybe they should just be removed. They might be better off
just as Kconfig rules, rather than as a "hey, you screwed up your
Kconfig" warning after the fact.

             Linus