packed, aligned

[dewar@gnat.com]

<<on an architecture where pointers must be 4-byte aligned (I think sparc is
one such architecture) can not be packed. You could organize these
>>

THat makes no sense to me. THere is no architecture in which it is not
possible to store a pointer misaligned, yes, of course reading it means
reading it in pieces and reassembling with shifts etc on some 
architectures, but so what, gcc can certainly do that.