linux-kernel - Re: vdso_standalone_test_x86.c build failure on Linus' tree

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Message-ID: <CA+5PVA6VuODM1q5AH_-ZeKnzzsmjquY7ykbHow=aWQAXc38bPg@mail.gmail.com>
Date:	Wed, 8 Oct 2014 17:21:53 -0400
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	Chuck Ebbert <cebbert.lkml@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...capital.net>,
	Peter Foley <pefoley2@...oley.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Jiri Kosina <jkosina@...e.cz>,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: vdso_standalone_test_x86.c build failure on Linus' tree

On Wed, Oct 8, 2014 at 5:09 PM, Chuck Ebbert <cebbert.lkml@...il.com> wrote:
> On Wed, 08 Oct 2014 13:55:00 -0700
> "H. Peter Anvin" <hpa@...or.com> wrote:
>
>> On 10/08/2014 01:46 PM, Chuck Ebbert wrote:
>> >
>> > Fedora doesn't cross-compile i686 builds because of problems like
>> > this. It sets up an i386 chroot and runs all native tools inside of
>> > it.
>> >
>>
>> Breaking cross-compilation is not okay, though, regardless of what
>> Fedora does.  It should be okay to, for example, build an i386 kernel on
>> an ARM box.
>>
>
> I think they tried that for a while, and ended up chasing compiler
> and makefile bugs all day. And then there's the software that wants
> to run self-tests as part of its build...

The Fedora kernel package cross builds the other way (ARM on i386)
just fine.  It might build ARM->i386 as well, but that's less useful.
At any rate, Peter is talking about the kernel, not software in
general.

josh
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