Jason: StackExchange does have lots of good hints, but it's not always
the correct. In this case, it's clearly wrong. uname -p has been
available on many Unix installations for decades.

I started writing the module back in 1999 and even then, the support
was already working on the systems I used at the time, and several
others, as you can see from this page:

https://www.egenix.com/www2002/python/mxCGIPython.html

The module was originally created to come up with a good name to
use for identifying platform binaries coming out of my mxCGIPython
project.

Note that the processor is not always needed to determine whether
software runs on a machine or not. The "uname -m" output often
is enough, but there are cases where e.g. compiler options are
used which produces code that only works on particular processors.

Perhaps adding a more capable API to interface to /proc/cpuinfo
would be a good idea.