libgecode-dev binary package in Ubuntu Precise i386

 Gecode is an attempt to construct an open, free, portable, accessible,
 and efficient environment for developing constraint-based systems and
 applications.
 .
 Gecode is radically open for programming: it can be easily
 interfaced to other systems. It supports the programming of new
 propagators (as implementation of constraints), branching strategies,
 and search engines. New variable domains can be programmed at the same
 level of efficiency as finite domain and integer set variables that
 come predefined with Gecode.

Source package