> to put its components to tell their search paths... If you yet don't know, > please learn this > thing, for instance via Google like looking via "search paths for GCC"... I don't need this information, I know where it searches for headers, and it searches in wrong places; I just only need to tell to the almost built compiler to search in an alternative directory. The point is that I can't use the -I and -L option on xgcc, beacause it isn't launched by me; it is launched by its compilation process.