Building 32 bit packages for centos8

[Stephen John Smoogen]

On Sat, 19 Dec 2020 at 03:59, Michael Ivanov  wrote:
> Hallo,
>
> I'm trying to build 32 bit rpm package for centos8 with mock. When I
> specify target arch as i386, then a lot of packages are reported as not
> found. When arch is omitted, then mock tries to build 64-bit package.
>
> In mock config I have:
>
> config_opts['target_arch'] = 'i386'
> config_opts['legal_host_arches'] = ('x86_64')
>
> This worked in older centos systems.
>
> Any hints?

RHEL and CentOS-8 do not have 32 bit support in the default directories. If
you need to build for 32 bit you will need to use the 'altarch' CentOS-8.
> Best regards,
>
> --
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>  (OvO) |  Михаил Иванов                    |
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[Florian Weimer]

* Michael Ivanov:
> Why separate repository would be needed? CentOS-8 as far as I can see
> contains 32-bit versions of all packages that I need. I can manually
> install them and compile the package, no problems.

The published i686 package set is not complete enough to create a mock
chroot from it.

There should be a way to get this working for most packages with a
carefully crafted mock configuration that sets up an x86_64 root, but
runs rpmbuild for a 32-bit build.  Or you install a VM with the 32-bit
development packages and run rpmbuild manually.  But some spec files are
simply not compatible with a build environment where gcc defaults to
create 64-bit binaries.

Internally, Red Hat has fully 32-bit buildroots, so we don't run into
this issue.

Thanks,
Florian

[Stephen John Smoogen]

On Mon, 21 Dec 2020 at 05:09, Florian Weimer  wrote:
> Michael Ivanov:
> > Why separate repository would be needed? CentOS-8 as far as I can see
> > contains 32-bit versions of all packages that I need. I can manually
> > install them and compile the package, no problems.
>
> The published i686 package set is not complete enough to create a mock
> chroot from it.
>
> There should be a way to get this working for most packages with a
> carefully crafted mock configuration that sets up an x86_64 root, but
> runs rpmbuild for a 32-bit build.  Or you install a VM with the 32-bit
> development packages and run rpmbuild manually.  But some spec files are
> simply not compatible with a build environment where gcc defaults to
> create 64-bit binaries.
>
> Internally, Red Hat has fully 32-bit buildroots, so we don't run into
> this issue.

Thank you Florian

I should have been more explicit and explained better in my email
> Thanks,
> Florian
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