This module provides an interface to libffi which enables you to call C
functions from Pure and vice versa. It extends and complements Pure's
built-in C interface in that it also handles C structs and makes Pure
functions callable from C without writing a single line of C code.
WWW: http://docs.pure-lang.googlecode.com/hg/pure-ffi.html
PR: ports/156103
Submitted by: Zhihao Yuan <lichray at gmail.com>