I am testing both option:
1) Building on Ubuntu 20.4 debian packages, source from /linuxcnc-dev/debian using
. That works. The debian packages install with gdebi on the same OS Ubuntu 20.4. This however are not real-time kernels, only simulated axis, as I understood.
2) I copy linuxcnc-dev files to a debian wheezy, trying to build there 'live'. Due to the python issues, building does not yet run. ./configure will report the missing packages, or version conflicts. I am not experienced enough to fix this. I might consider a 2nd python installation, but last time I tried this, I messed things up. I am having python 2.7.3 on the wheezy installation. I would need to install something like python 3.6 to build linuxcnc?
I am thankful for solutions in either direction. 1) Build wheezy packages on a later OS, or 2), make it compile on the wheezy by fixing the remaining dependencies.