Re: Decoupling our alignment assumptions about int64 and double

I wrote:
> Your thought of maybe applying some compiler ju-jitsu led me to a
> different research direction: if we can get the compiler to lay out
> the catalog structs as if DOUBLEALIGN and LONGALIGN were 4, then
> problem solved without need for any user-table compatibility break.
> And we can: it looks like inserting
> #pragma pack(4)
> before each catalog struct definition (and then "#pragma pack()"
> afterwards to restore the normal rules) would do the trick.

Here's a POC patch to fix AIX's alignment problems that way.
I feel much better about this approach than the other one ...

regards, tom lane