title: Error compiling Qualnet on Mac: file is not of required architecture
body: <p>When trying to compile Qualnet on Mac, I got the following error:
  ld: warning: in ../kernel/obj/mobility_private.o-darwin-x86-gcc-4.0, file is not of required architecture
  and a bunch of errors for other files in this kind.
  So I'm wondering if there is anyway to solve the problem.
  Anxious waiting for help.</p>