Thanks. It didn’t occur to me that that wasn’t the source. (It doesn't look like I can edit it the OP.) BTW, it does compile. I've been in communication with the author and he has shared with me additional code and details. I've asked his permission to share it here (and encouraged him to share it himself).
Gnucobol formerly opencobol uses c as an intermediate language and offer nonstandard functionality to link/call arbitrary c libraries. This of course opens the door to lots of peculiar “in cobol” apps.
https://sourceforge.net/p/open-cobol/contrib/514/tree//trunk...
and I'd like to know if the source compiles.