GNU bug report logs - #43513
readdir misbehaves when running 32-bit user space on a 64-bit-kernel - kernel/userspace interface mismatch in getdents64

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Message #56 received at 43513 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Enge <andreas <at> enge.fr>
To: Danny Milosavljevic <dannym <at> scratchpost.org>
Cc: Ludovic Courtès <ludo <at> gnu.org>, 43513 <at> debbugs.gnu.org
Subject: Re: bug#43513: json-c build failure (on armhf-linux) while trying to
 build u-boot
Date: Sun, 27 Sep 2020 11:50:27 +0200

Hello Danny,

On Sat, Sep 26, 2020 at 12:53:20PM +0200, Danny Milosavljevic wrote:
> I'd like to test what happens if one builds json-c on an aarch64 host
> for i686.
> Could we enable qemu-binfmt for i686 on an aarch64 host for me to test it?
> One machine is enough--I'd just run
>   guix environment -s i686-linux gcc-toolchain -- gcc -o a00 -D_FILE_OFFSET_BITS=xxx a00.c
> and then later
>   guix build -s i686-linux json-c

you can give it a try on dover.guix.info, but you should be ready for
a wait: As other build machines, it does not use substitutes, so everything
will be built locally using qemu-binfmt. Maybe you could import what
is needed for the "guix environment" from an i686 machine?

I would suggest to do a "guix pull --commit=0939462e3f81bc98b38bdb7610e6a80ca1cbaa1b",
since this is the version already available on the machine.

Andreas

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