Just a small issue: on my 2nd computer I wanted to uninstall newlisp 7.5.04 (running Slackware 9.1). Normally, with sourcecode install, the target "uninstall" exists; but not in this Makefile, not in your newest 8.0.12 source.
Would it be an idea to improve the (Linux) Makefile so an uninstall is possible?