wip/cl-cffi NetBSD

CFFI, the Common Foreign Function Interface, purports to be a portable foreign function interface for Common Lisp. The CFFI library is composed of a Lisp-implementation-specific backend in the CFFI-SYS package, and a portable frontend in the CFFI package.

Some of the key features include:

• an extensible foreign type system;
• callback support;
• support for foreign string encodings;
• ported to Allegro CL, Corman CL, CLISP, CMUCL, ECL, LispWorks, Clozure CL, SBCL and the Scieneer CL;
• a groveller;
• a UFFI compatibility layer.