Hi I upgrade my GCC from 2.95 to 3.3, I actually use Slackware 8.1, when i had GCC 2.95 I compiled some programs that I made was ok, now i have GCC 3.3 and when I try to compile these programs apears an error. The source's syntaxis is correct, when i make te object (.o file), works fine, but when i link the objetcs the lasts lines of the output ar ... ... main.o(.gnu.linkonce.t._ZN12smart_objectI4TDibED0Ev+0x26): In function `smart_object<TDib>::~smart_object [in-charge deleting]()': ../common/smart.h:107: referencia a `TDib::~TDib [in-charge]()' sin definir collect2: ld devolvió el estado de salida 1 almost all lines of the erorr said thath the function X in reference with Y is undefined. what's wrong with it? what can i do? Thank you _________________________________________________________ Do You Yahoo!? La mejor conexión a internet y 25MB extra a tu correo por $100 al mes. http://net.yahoo.com.mx