| From: | "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> |
|---|---|
| To: | "Zdenek Kotala" <Zdenek(dot)Kotala(at)Sun(dot)COM> |
| Cc: | "PostgreSQL-development" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal: PageLayout footprint |
| Date: | 2008-08-11 11:39:13 |
| Message-ID: | 48A024E1.4090509@enterprisedb.com |
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| Lists: | pgsql-hackers |
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
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