hello, i'm a brand new user to boost, with xcode 2.4.1, os x 10.4.11 (intel), i686-apple-darwin8-gcc-4.0.1 i'm getting some errors trying to use a library (http:// www.cs.kuleuven.ac.be/~ares/libply/) which uses boost. however i am stuck at the error: error: 'std::tr1' has not been declared doing ./config from boot_root/libs/config, i get the following output related to tr1: checking std::tr1::array... no checking std::tr1::bind... no checking std::complex overloads... no checking std::complex inverse trig functions... no checking std::tr1::function... no checking std::tr1::hash... no checking std::tr1::mem_fn... no checking std::tr1::random... no checking std::tr1::reference_wrapper... no checking std::tr1::regex... no checking std::tr1::result_of... no checking std::tr1::shared_ptr... no checking std::tr1::tuple... no checking std::tr1::type_traits... no checking std::tr1::unordered_map... no checking std::tr1::unordered_set... no checking std::tr1::utility... no so, how can i enable the successful use of the std::tr1 libraries available with boost? regards,