linux-kernel - Re: Build regressions/improvements in v4.9-rc1

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Message-ID: <1476879762.26312.12.camel@synopsys.com>
Date:   Wed, 19 Oct 2016 12:23:12 +0000
From:   Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:     "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "thomas.petazzoni@...e-electrons.com" 
        <thomas.petazzoni@...e-electrons.com>
CC:     "arnd@...db.de" <arnd@...db.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "Vineet.Gupta1@...opsys.com" <Vineet.Gupta1@...opsys.com>,
        "geert@...ux-m68k.org" <geert@...ux-m68k.org>,
        "mmarek@...e.cz" <mmarek@...e.cz>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>
Subject: Re: Build regressions/improvements in v4.9-rc1

Hi Michael,

On Wed, 2016-10-19 at 22:50 +1100, Michael Ellerman wrote:
> Vineet Gupta <Vineet.Gupta1@...opsys.com> writes:
> > 
> > On 10/17/2016 02:02 PM, Arnd Bergmann wrote:
> > > 
> > > On Monday, October 17, 2016 9:59:24 AM CEST Vineet Gupta wrote:
> > > > 
> > > > On 10/17/2016 12:34 AM, Geert Uytterhoeven wrote:
> > > > > 
> > > > > > 
> > > > > > 48 error regressions:
> > > > > > > 
> > > > > > >   + /home/kisskb/slave/src/arch/arc/include/asm/atomic.h: Error: bad instruction `llockd r2,[r0]':  => 476
> > > > > > >   + /home/kisskb/slave/src/arch/arc/include/asm/atomic.h: Error: bad instruction `llockd r2,[r13]':  =>
> > > > > > > 475
> > > > 
> > > > [snip...]
> > > > 
> > > > > 
> > > > > > 
> > > > > > > 
> > > > > > >   + /home/kisskb/slave/src/arch/arc/include/asm/atomic.h: Error: bad instruction `scondd r4,[r8]':  => 516
> > > > > > >   + /home/kisskb/slave/src/arch/arc/include/asm/atomic.h: Error: bad instruction `scondd r6,[r3]':  => 478
> > > > > arcv2/axs103_smp_defconfig
> > 
> > @Michael can I bother you to upgrade the tools or is this absolutely must for you.
> 
> Happy to, just short on time.
> 
> I tried building a new toolchain with buildroot, using the instructions
> from last time, but the resulting toolchain doesn't relocate, ie. it has
> hard-coded paths in it. Any ideas?

Hm... that's strange - it used to work but doesn't work with newer Buildroot...

Anyways if something very simple (i.e. with no extra libraries) works for you just go
ahead and grab pre-built image that Thomas Petazzoni builds.

That's the most recent one:
http://autobuild.buildroot.org/toolchains/tarballs/br-arcle-hs38-full-2016.08-613-ge98b4dd.tar.bz2

If I'm not mistaken Thomas runs some post-processing script to make these toolchains
relocatable.

Maybe Thomas may comment on that and even maybe will share his post-processing technique
so you'll be able to build your customized toolchain.

Regards,
Alexey