| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Greg Burd" <greg(at)burd(dot)me> |
| Cc: | "Thomas Munro" <thomas(dot)munro(at)gmail(dot)com>, Dagfinn Ilmari Mannsåker <ilmari(at)ilmari(dot)org>, "PostgreSQL Hackers" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "Andres Freund" <andres(at)anarazel(dot)de>, "Lukas Fittl" <lukas(at)fittl(dot)com>, "John Naylor" <johncnaylorls(at)gmail(dot)com>, "Bryan Green" <dbryan(dot)green(at)gmail(dot)com> |
| Subject: | Re: Centralised architecture detection |
| Date: | 2026-07-01 13:20:32 |
| Message-ID: | 3138572.1782912032@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"Greg Burd" <greg(at)burd(dot)me> writes:
> On Tue, Jun 30, 2026, at 9:11 PM, Tom Lane wrote:
>> Based on that thread, I'm thinking
>> #if SIZEOF_VOID_P == 8
> I don't see SIZEOF_VOID_P but I do find:
> #define __SIZEOF_POINTER__ 8
SIZEOF_VOID_P is set up by autoconf/meson via pg_config.h.
So it will be available here. I'd rather use our own
symbol because, if other arches emerge with similar issues,
we can be sure of having a common pattern to follow.
I do see __SIZEOF_POINTER__ getting predefined locally
(in recent gcc and clang on x86_64), but it's far from clear
to me how standard, or well-documented, that macro is.
regards, tom lane
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