I am restoring an old iMac G5 which still uses a powerpc processor. Unfortunately, Debian Jessie was the last version of Debian to support Powerpc7. I would like some of the new Stretch packages. I can always compile them from source, but apt won't put source packages in its cache when I do apt-get update. This means I can't download the package or its dependencies.
So my question is, how can I build and install a package and its dependencies from source?
I just tried Stephen Kitt's suggestion for running
apt-get update. Previously, it failed with errors. It recognizes stretch now. I still have trouble getting dependencies though. I think
apt-get build-dep is trying to download binaries, and failing.
If you want it, my sources.list is here.