swi-prolog-clib 5.6.64-2 (amd64 binary) in ubuntu karmic

 SWI-Prolog is a fast and powerful ISO/Edinburgh-style Prolog compiler with a
 rich set of built-in predicates. It offers a fast, robust and small
 environment which enables substantial applications to be developed with it.
 .
 SWI-Prolog additionally offers:
 .
  * A powerful module system
  * Garbage collection
  * Unicode character set handling
  * Unbounted integer and rational number arithmetic
  * Multithreading support
  * A powerful C/C++ interface
  * GNU Readline interface
 .
 This library provides SWI-Prolog foreign libraries to cater for various
 OS-dependent and/or obscure features of SWI-Prolog.