Comment 1 for bug 1737664

A few thoughts on this:

pbr supports all of the parameters except ext_modules: https://github.com/openstack-dev/pbr/blob/master/pbr/util.py#L96

However, even if that were implemented I'm not sure the CMake classes could live in setup.py. setup() in pbr would be called from a different module that wouldn't have local access to those classes. I'm not sure if there's a way to reference custom classes from pbr. I would think there's some way to do it, but it would require some experimentation.