Although C preprocessor can't transform the text too much, it's
still possible to use concatenation to avoid silly typing like:

DEFUN ("foo", Ffoo, Sfoo, ...)

and use:

DEFUN ("foo", foo, ...)

instead. The core change is simple, but the obvious rest is ~450K
uncompressed (99.9% was generated by elisp program, BTW).

Dmitry