Bug 1471593

mockbuild has this option

  --root CONFIG, --mock-config CONFIG
                        Override mock configuration (like mock -r)

E.g.

fedpkg mockbuild --mock-config fedora-26-i386

Thanks, it works for i386, but what about arm?

$ fedpkg mockbuild --mock-config fedora-26-arm
/usr/lib/python2.7/site-packages/fedora/client/bodhi.py:48: DeprecationWarning: fedora.client.bodhi has been deprecated. Please use bodhi.client.bindings instead.
  DeprecationWarning)


Wrote: /home/mikhail/mutter/mutter-3.24.3-2.fc26.src.rpm
You are attempting to run "mock" which requires administrative
privileges, but more information is needed in order to do so.
Authenticating as "root"
Password: 
ERROR: Could not find required config file: /etc/mock/fedora-26-arm.cfg
ERROR:   If you're trying to specify a path, include the .cfg extension, e.g. -r ./target.cfg
Could not execute mockbuild: Command '['mock', '-r', 'fedora-26-arm', '--resultdir', u'/home/mikhail/mutter/results_mutter/3.24.3/2.fc26', '--rebuild', u'/home/mikhail/mutter/mutter-3.24.3-2.fc26.src.rpm']' returned non-zero exit status 1

For me not worked for arm architecture.

Looks like your user account is not in mock group. Maybe you need https://fedoraproject.org/wiki/Using_Mock_to_test_package_builds#How_do_I_use_Mock.3F

I'm not familiar with building package in arm arch. I find /etc/mock/fedora-26-armhfp, not sure if it's the config for arm. mockbuild actually runs mock and value passed to --root or --mock-config is just passed to -r option of mock.

Look at what config files there are. I don't have fedora-26-arm.cfg, but there is fedora-26-armhfp.cfg which might work for you.

$ ls /etc/mock/fedora-26-*
/etc/mock/fedora-26-aarch64.cfg  /etc/mock/fedora-26-ppc64le.cfg
/etc/mock/fedora-26-armhfp.cfg   /etc/mock/fedora-26-s390x.cfg
/etc/mock/fedora-26-i386.cfg     /etc/mock/fedora-26-x86_64.cfg
/etc/mock/fedora-26-ppc64.cfg
$ rpm -q mock
mock-1.4.2-1.fc25.noarch

$ fedpkg mockbuild --mock-config fedora-26-armhfp
/usr/lib/python2.7/site-packages/fedora/client/bodhi.py:48: DeprecationWarning: fedora.client.bodhi has been deprecated. Please use bodhi.client.bindings instead.
  DeprecationWarning)


Wrote: /home/mikhail/mutter/mutter-3.24.3-2.fc26.src.rpm
You are attempting to run "mock" which requires administrative
privileges, but more information is needed in order to do so.
Authenticating as "root"
Password: 
ERROR: Cannot build target armv7hl on arch x86_64, because it is not listed in legal_host_arches armv7l
Could not execute mockbuild: Command '['mock', '-r', 'fedora-26-armhfp', '--resultdir', u'/home/mikhail/mutter/results_mutter/3.24.3/2.fc26', '--rebuild', u'/home/mikhail/mutter/mutter-3.24.3-2.fc26.src.rpm']' returned non-zero exit status 6


What is legal_host_arches?

> What is legal_host_arches?

I have no knowledge about this. I do some research and find

# When host system architecture is not in 'legal_host_arches' list, mock will refuse to switch to
# 'target_arch' and will raise error.

from https://github.com/rpm-software-management/mock/blob/devel/etc/mock/site-defaults.cfg#L300

and

only armv7l is listed in legal_host_arches in /etc/mock/fedora-26-armhfp.cfg, which is installed in my system.

config_opts['legal_host_arches'] = ('armv7l')

My understand is arm packages has to be built with mock on an ARM machine.

So it's  impossible build for arm arch on x86?
If this is true, then this issue can be closed, although I would like it to become possible in the future.

And last question:

My typical workflow for testing upstream fix look like:
1. $ fedpkg clone -a geany // Get package
2. $ cd geany
3. $ fedpkg prep           // Get sources, extract and apply existing patches
Here I applied patches changes from upstream, or make changes by self
4. $ fedpkg patch orig     // If I make changes by self then I need create patch
5. $ rpmdev-bumpspec -c "check upstream fix" geany.spec  // Update build number and add change log
6. $ fedpkg mockbuild --mock-config fedora-26-i386 // Here build package for target architecture

So question is existing some tool for automatically adding new patch in spec  between steps 4 and 5? If this tool not existed can I ask to make this utility?
This would save me from editing manually spec file at all (it save my time).
Thanks.

(In reply to Mikhail from comment #7)
> So it's  impossible build for arm arch on x86?

From what I learned, I guess it is. But, I have no idea of why and any other background about this. I recommend  you could try to consult mock developer or a wider range of Fedora packagers, probably devel mailing list.
 
> So question is existing some tool for automatically adding new patch in spec
> between steps 4 and 5? If this tool not existed can I ask to make this
> utility?
> This would save me from editing manually spec file at all (it save my time).
> Thanks.

Sorry, I don't know which tool can do this. Also, suggest you to ask in wider range of Fedora packagers.

If you have no any further questions, I'm going to close this bug.

I asked my question in IRC channel #fedora-devel, but there was no one who would be well versed in the cross compilation.
I've been advised use the koji instead.
But when I tryed scratch build package with koji occurred another issue.
It seems that I'm not the only one who has encountered such a problem
https://bugzilla.redhat.com/show_bug.cgi?id=1472348

Can you invite here someone who well known cross compiling for arm arc?

Hi Mikhail, I don't know who is experienced on cross compiling from arm arch. Bug 1472348 you mentioned belongs to Koji not fedpkg, so please follow up that bug.

cross compilation is not supported in mock.