Before I try, just always have a question - is it lisp-1 or lisp-2? Is it scheme/lisp?
Given the lisp15.scm is a scm it seems to be underlying is a lisp 1.5 running under scheme. But given it is doing make, is it just share code?
Too many of this but really want to have a code for simple C based lisp to play with. Is that it?