Yang Zhang <yanghatespam@xxxxxxxxx> writes: > Is there something analogous to __alignof__ that can tell me the > required alignment? (E.g., if I'm serializing data and trying to pack > together everything without padding...) As far as I know there is no way to ask for the alignment required by the target machine. However, if you use __attribute__ ((packed)), then gcc will use the available instructions to retrieve the field: a misaligned full word read if possible and appropriate, otherwise byte reads. Ian
