GnuCOBOL has an option to create a xref listing. So I again modified my Python 3 greenbar program to do page breaks when it sees the form feed, because GnuCOBOL put them there. For non GnuCOBOL output files I count lines and manually goto a new page!
Here is an example of a GnuCOBOL listing file PDF created by my greenbar program.
My greenbar program works but is very kludgy...not the best example of my work.