| From: | Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com> |
|---|---|
| To: | John Naylor <johncnaylorls(at)gmail(dot)com> |
| Cc: | Daniel Gustafsson <daniel(at)yesql(dot)se>, Jakub Wartak <jakub(dot)wartak(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de> |
| Subject: | Re: Fix typo 586/686 in atomics/arch-x86.h |
| Date: | 2025-12-20 07:38:59 |
| Message-ID: | CAN4CZFNi_+81B5MaiZNvbu0931nxuRPBk2-x5i2y0ZLrVu-W_w@mail.gmail.com |
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| Lists: | pgsql-hackers |
It seems this is dependent on the linux distribution. I assumed gcc
uses the same march on all modern linux distributions, but that
doesn't seem to be the case.
OL 8/9/10, Gentoo, Arch seem to keep the x86-64 march even when you
specify -m32:
bash-5.2# gcc -m32 -Q --help=target | grep march
-march= x86-64
Known valid arguments for -march= option:
bash-5.2# gcc -Q --help=target | grep march
-march= x86-64-v3
Known valid arguments for -march= option:
But Ubuntu/Debian changes march to i386 when you do that:
❯ gcc -m32 -Q --help=target | grep march
-march= i686
Known valid arguments for -march= option:
❯ gcc -Q --help=target | grep march
-march= x86-64
Known valid arguments for -march= option:
Gcc version doesn't seem to change this even if I install multiple gcc
versions on the same setup.
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