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

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Message-ID: <88ab1610-3096-b4a0-e1af-9443cb8b9953@physik.fu-berlin.de>
Date:   Fri, 19 Mar 2021 13:15:59 +0100
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        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 3/19/21 12:56 PM, Arnd Bergmann wrote:
>> We'll get there. There are some other SPARC-related clang bugs that need
>> to be squashed first. We have made quite some improvements and it's actually
>> maintained by the community. Of course, we don't have a commercial backer
>> but that shouldn't be necessary for open source to work.
> 
> I meant there is no point for Naresh to do it as part of his build
> testing with tuxmake.
> If someone else gets it working, they can tell Naresh to try again, but until
> then, I'd limit clang regression testing to x86, arm, powerpc, s390, mips, riscv
> and arc.

It's definitely a useful report as I haven't done any tests in this regard yet
and we're certainly interested in getting this to work. We previously had Nick
give a session on building the kernel with clang in our monthly m68k meeting [1]
and he said, they are interested in supporting as many architectures as possible
in their efforts.

Adrian

> [1] http://m68k.info/#llvm:linux:video

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@...ian.org
`. `'   Freie Universitaet Berlin - glaubitz@...sik.fu-berlin.de
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