Well, I was forced to use my remaining brain cell and solve this before I went off the deep end.
Came down to this: ld wasn’t finding the liquid library. So in “makefileRaspbian” I added “-L/usr/local/lib”,
which is where libliquid.* are located. Solved (for now, tomorrow brings many more opportunities for me to
screw up.) But sdrglut.x works as advertised. I shall sleep better…