linux-kernel - Re: sparc: clang: error: unknown argument: '-mno-fpu'

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Message-ID: <CAK8P3a3Za8N2-Hs02nG0CcGJ+RcTrR0UqDOesd8E6PmhYRR2_A@mail.gmail.com>
Date:   Fri, 19 Mar 2021 12:31:57 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     clang-built-linux <clang-built-linux@...glegroups.com>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        sparclinux <sparclinux@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Anders Roxell <anders.roxell@...aro.org>,
        Daniel Díaz <daniel.diaz@...aro.org>
Subject: Re: sparc: clang: error: unknown argument: '-mno-fpu'

On Fri, Mar 19, 2021 at 8:36 AM Naresh Kamboju
<naresh.kamboju@...aro.org> wrote:
>
> Linux mainline master build breaks for sparc defconfig.
> There are multiple errors / warnings with clang-12 and clang-11 and 10.
>  - sparc (defconfig) with clang-12, clang-11 and clang-10
>  - sparc (tinyconfig) with clang-12, clang-11 and clang-10
>  - sparc (allnoconfig) with clang-12, clang-11 and clang-10
>
> make --silent --keep-going --jobs=8
> O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=sparc
> CROSS_COMPILE=sparc64-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache
> clang'

I don't think anyone has successfully built a sparc kernel with clang,
and I don't
think it's worth trying either, given how little upstream work the
sparc port sees
overall.

        Arnd