UUCMP
UUCMP(uuid1.time_low, uuid2.time_low);
UUCMP(uuid1.time_mid, uuid2.time_mid);
UUCMP(uuid1.time_hi_and_version, uuid2.time_hi_and_version);
UUCMP(uuid1.clock_seq_hi_and_reserved, uuid2.clock_seq_hi_and_reserved);
UUCMP(uuid1.clock_seq_low, uuid2.clock_seq_low);