Hi, I have some undefined references (see below). It looks like I have to use a compiler definition? Is it possible to use regex with gcc.3.2.3? In function `bool boost::re_detail::query_match_aux undefined reference to `boost::reg_expression<char, boost::regex_traits<char>, _STL::allocator<char> >::~reg_expression [in-charge]()' ( in function: In function `bool boost::re_detail::query_match_aux<char const*, _STL::allocator<char>, char, boost::regex_traits<char>, _STL::allocator<char> >(char const*, char const*, boost::match_results<char const*, _STL::allocator<char> >&, boost::reg_expression<char, boost::regex_traits<char>, _STL::allocator<char> > const&, unsigned, boost::re_detail::_priv_match_data<char const*, _STL::allocator<char> >&, char const**)': ) Bye