[plt-scheme] FFI and pointer manipulations

Robby Findler wrote:

> Can you pass the pointer to the front and a fixnum to the C code and
> let it do the addition?

In principle yes, but I'd like to avoid writing any C code. It would
make distributing a package with PLaneT tricky. I would either need
the user to have a working C compiler or to pre-compile the shared
library on the supported platforms myself.

-- 
Jens Axel Søgaard