Hi Ludo,

On Tue, 29 Sep 2020 12:25:54 +0200
Ludovic Courtès <ludo@gnu.org> 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?  
> 
> I think you can just run ‘qemu-i386 /path/to/your/program’; no need for
> the whole binfmt_misc shebang.

Sure, but I want to know what happens to json-c.  That sounds like a lot of
manual invocations (like about 20000--for invocations of "configure", "gcc",
including all the dependencies etcetc).

Andreas Enge already tried to configure dover.guix.info to uses qemu-binfmt
to emulate i686-linux, but apparently it doesn't work (on dover.guix.info):

building /gnu/store/7wz8nqh6nkfqz6l780i6i34c6wa6ic6q-guile-bootstrap-2.0.drv...
\builder for `/gnu/store/7wz8nqh6nkfqz6l780i6i34c6wa6ic6q-guile-bootstrap-2.0.drv' failed with exit code 1
build of /gnu/store/7wz8nqh6nkfqz6l780i6i34c6wa6ic6q-guile-bootstrap-2.0.drv failed
View build log at '/var/log/guix/drvs/7w/z8nqh6nkfqz6l780i6i34c6wa6ic6q-guile-bootstrap-2.0.drv.bz2'.

bash-5.0$ bzless /var/log/guix/drvs/7w/z8nqh6nkfqz6l780i6i34c6wa6ic6q-guile-bootstrap-2.0.drv.bz2
------> /var/log/guix/drvs/7w/z8nqh6nkfqz6l780i6i34c6wa6ic6q-guile-bootstrap-2.0.drv.bz2 <------
while setting up the build environment: executing `/gnu/store/mzfkrxd4w8vqrmyrx169wj8wyw7r8i37-bash': No such file or directory