From: 510046470588-0001@t-online.de (klaus schilling)
   Date: Sun, 15 Feb 2004 22:35:02 +0100

   what is the difference between Projector and guile-sdl ?

Projector is no longer maintained.  The Projector author contributed
code to Guile-SDL, which then also went through a period of neglect
before finding new maintainership.

Projector installation is a shared object library in ${libdir} (if I
recall correctly -- I played w/ it from the build dir w/o installing).
Guile-SDL installation are compiled modules in ${libdir}/guile/site/sdl
(compiled modules are shared object libraries that follow certain
conventions).

Projector has fewer smob types (and hence less type checking) than
Guile-SDL.  Consequently projector is a bit faster and less memory-using
than Guile-SDL but crashes more easily on uncareful code.

Projector uses variables in most places where Guile-SDL uses symbols
(event codes, keysyms, etc).

Projector proc names begin with "sdl-" (usually, there are some
exceptions) while Guile-SDL leaves prefixing to the user.

Projector does not support TTF.