A) Are you the same guy that’s working with Nir?
Did you install gcc/xcode from a DVD for a 32 bit or 64 bit OS? Perhaps you installed it from a source other than the one that came with the computer? The first set of errors seems to say that the computer wants a different set of libraries than the ones it has. (I’m well in to wild guess territory here; we can never solve the sorts of problems centrally since it’s an issue pretty specific to one computer)