linux-kernel - Re: Build/qemu test results for v4.18-rc2

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Message-ID: <20180627163009.GA6826@roeck-us.net>
Date:   Wed, 27 Jun 2018 09:30:09 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>, mcroce@...hat.com,
        sbrivio@...hat.com, David Miller <davem@...emloft.net>
Subject: Re: Build/qemu test results for v4.18-rc2

On Wed, Jun 27, 2018 at 08:27:47AM -0700, Linus Torvalds wrote:
> On Tue, Jun 26, 2018 at 8:40 AM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > The problem on x86-64 cross-building to i386 is that the *compiler* is
> > the same, but the flags are not, and the games the Makefile plays
> > aren't sufficient. It plays with changing HOSTCC to CC in order to get
> > he right target compiler, but since the difference between i386 and
> > x86-64 is not the compiler but the "-m64" in the cflags, it doesn't
> > actually do what it intended to do.
> >
> > We'll get it sorted, I think.
> 
> So right now the build fix is likely to be this:
> 
>     https://patchwork.ozlabs.org/patch/935246/
> 

I can confirm that the patch fixes the i386 cross-compile issue.
I just sent a Tested-by:.

Guenter

> but note that it's literally just a build fix, and for a i386
> cross-compile it embeds the wrong binary so it won't actually run
> correctly. For this whole "test the concept" stage that's fine.
> 
>                 Linus