In _io.scm we find the definition

(define ##scheme-file-extensions #f) (set! ##scheme-file-extensions '((".scm" . #f) (".six" . six)))

and this is used in gsc somehow so that

% gsc -c -expansion interp.gsc

doesn't work (unrecognized file type), yet

% gsc

(compile-file-to-c "interp.gsc" '(expansion))

does work.

So what's the point of having ##scheme-file-extensions? It just seems to get in the way.

Brad