Re: Proposal: PageLayout footprint

Zdenek Kotala wrote:
> By my opinion -fipa-struct-reorg GCC option could break structure.

That option would probably break a lot of things. Like our 
"variable-sized array as last field of a struct" hacks.

> And 
> maybe there are more compiler magic switches and optimization on 
> different platforms which can modify structure alignment or member 
> order. It probably does not happen often but footprint should protect 
> people to shot himself.

We depend on a certain member order and alignment rules. If we're 
worried about that, we should add checks in configure instead, to barf 
if you try to use such options.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com