Tom Clune

Sorry - just back from vacation. It looks like there are missing `$()` around `PFUNIT_INSTALL_DIR`. I will go take a look at the included Makefiles. The CI is really only...

OK - I see now that your `PFUNIT_INSTALL_DIR` is an explicit path - not meant to be a shell variable. Sorry about that. Thinking ... The usual cause of these...

> Does the build_submodule routine only exist, such that the user does not have to write "git clone --recursive .." ? I forget the full history at this point, but...

Yeah - I've been annoyed by this for a long time, but do not actually know how to cleanly fix this. It probably is not hard, but it's not quite...