COMPILE_TEST is just so that you can view build warnings. We would say: depends on USB && NET && (!64BIT || COMPILE_TEST) of depends on USB && NET && (X86_32 || (X86 && COMPILE_TEST)) If you don't have USB or NET, you're get build errors but they don't indicate bugs. If you build on X86_64 the warnings are real bugs. regards, dan carpenter _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel