if skip_x64_x86 and host_os is not None and (build_os == host_os) and \
            host_arch is not None and ((build_arch == "x86_64") and (host_arch == "x86") or
                                       (build_arch == "sparcv9") and (host_arch == "sparc") or
                                       (build_arch == "ppc64") and (host_arch == "ppc32")):
        return False