linux-kernel - Re: cross-compiling a 64-bit kernel on a 32-bit host

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Message-ID: <20180511033950.ahkey2jnsd5i2gvi@wfg-t540p.sh.intel.com>
Date:   Fri, 11 May 2018 11:39:50 +0800
From:   Fengguang Wu <fengguang.wu@...el.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, LKP <lkp@...org>,
        LKP <lkp@...el.com>, Julie Du <julie.du@...el.com>,
        Philip Li <philip.li@...el.com>
Subject: Re: cross-compiling a 64-bit kernel on a 32-bit host

Hi Josh,

CC LKP team.

On Thu, May 10, 2018 at 05:36:19PM -0500, Josh Poimboeuf wrote:
>Hi Fengguang,
>
>I occasionally get compilation bug reports from people who are
>cross-compiling an x86-64 kernel target on an x86-32 host.
>
>Any chance the 0-day build bot could test that configuration?  I think
>just building a defconfig would be sufficient.  It would help sort out
>issues in objtool and other host-built scripts.

To do that we'll need to create a new build chroot. Julie/Philip
should be able to evaluate the efforts and do the plan.

Thanks,
Fengguang