Fix key events on OS X to match Windows/Linux behavior.
Work around fltk different punctuation behavior on OS X.
OS X/memory access fixes
Changes to build on OSX and fix crashes.
Do you have a copy of the OCCAM repository saved? It's long gone from the interwebs and not in web.archive.org.
I just built HEAD on an M1 MBP; the only change I had to make was adding #include <stdlib.h> to src/pref_form.h. I also had to export LDFLAGS="-L/opt/homebrew/opt/jpeg/lib -rpath /opt/homebrew/lib" and of course installed the head rather than bottled version of fltk since there are some vital fixes (can't remember what) in the 1.4.x series. I haven't looked into building for distribution.