linux-kernel - Re: x86 - clang / objtool status

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Message-ID: <alpine.DEB.2.21.1907190837350.1785@nanos.tec.linutronix.de>
Date:   Fri, 19 Jul 2019 08:39:00 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Nathan Chancellor <natechancellor@...il.com>
cc:     LKML <linux-kernel@...r.kernel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: x86 - clang / objtool status

On Thu, 18 Jul 2019, Nathan Chancellor wrote:

> Hi Thomas,
> 
> I can't comment on the objtool stuff as it is a bit outside of my area
> of expertise (probably going to be my next major learning project) but I
> can comment on the other errors.
> 
> On Thu, Jul 18, 2019 at 10:40:09PM +0200, Thomas Gleixner wrote:
> >  Build fails with:
> > 
> >   clang-10: error: unknown argument: '-mpreferred-stack-boundary=4'
> >   make[5]: *** [linux/scripts/Makefile.build:279: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_resource.o] Error 1
> 
> Arnd sent a patch for this which has been picked up:
> https://lore.kernel.org/lkml/CADnq5_Mm=Fj4AkFtuo+W_295q8r6DY3Sumo7gTG-McUYY=CeVg@mail.gmail.com/

Which I applied and now I get:

ERROR: "__fixdfsi" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__eqdf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__truncdfsf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__nedf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__floatsidf" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__divdf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__adddf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__ledf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__subdf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__muldf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__fixunsdfsi" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__floatunsidf" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__extendsfdf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__gedf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__ltdf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__gtdf2" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: "__floatdidf" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
make[2]: *** [/home/tglx/work/kernel/linus/linux/scripts/Makefile.modpost:91: __modpost] Error 1