Hello While you are looking at this - are the visible symbols in libruby prefixed with something like ruby_ or rb_? There seem to be a few random functions here and there, the st_, vm_ iseq_ and insn_ stuff. Also oniguruma has many symbols in that list. As I understand it Ruby uses a modified Oniguruma so people who would like to use Ruby and Oniguruma might have a hard time putting it together. With 1.8 I had some trouble linking a program using a standalone regex library with libruby as there was something like regex_start in both. Thanks Michal