When I request builds in this recipe it only creates 32 bit and 64 bit packages. How to create packages for armhf, arm64, or PowerPC?
There is no need to enable arm builds for packages built with python, as python source is interpreted, and is architecture independent. The architecture in debian/control should be all, and the PPA package will automatically work in all architectures (although Launchpad will only show it for amd64 or i386).
For other packages, the entry for architecture in debian/control should be any.
To enable ARM builds
As of 8 November 2016, enabling ARM builds is self-service: you can change an option in the PPA settings to get it to build for any of the following architectures automatically (documentation link):
Log in and select "Change details" in the upper right corner of your PPA page. At the bottom of the page that follows, you'll see the above options that can be enabled.
To rebuild already published packages for ARM
Once you have enabled ARM in the Launchpad PPA settings, click "copy packages", and copy the packages to the same PPA (click on "copy existing binaries", so that Launchpad will simply copy the already built packages for amd64 or i386, and will only build new packages for ARM).
When the next version of your package is released, you won't have to repeat this procedure, Launchpad will automatically build it for all architectures you had selected.
The following entries are ones that only an administrator of Launchpad can enable for your account.
For it, you still request access on the forums, although searching the forum indicates that Canonical previously only did this under special circumstances (only if you're a Canonical employee or have a contract in place with Canonical). Another forum post suggests that powerpc and s390x builds should be available to all users by now, but I'm not sure if the security concerns of building your (possibly malicious) package on non-virtualized Canonical hardware have been resolved.
