| From: | Peter Eisentraut <peter(at)eisentraut(dot)org> |
|---|---|
| To: | Sriram RK <sriram(dot)rk(at)outlook(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Noah Misch <noah(at)leadboat(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, Michael Paquier <michael(at)paquier(dot)xyz>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, "tvk1271(at)gmail(dot)com" <tvk1271(at)gmail(dot)com>, "sriram(dot)rk(at)in(dot)ibm(dot)com" <sriram(dot)rk(at)in(dot)ibm(dot)com> |
| Subject: | Re: AIX support |
| Date: | 2024-05-23 05:59:39 |
| Message-ID: | dc89bc84-c9a9-4792-8857-7eafc0234cfb@eisentraut.org |
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| Lists: | pgsql-hackers |
On 22.05.24 18:15, Sriram RK wrote:
> Please find the attached patch.
>
> Apart from the AIX specific changes, there is a minor change in this
> file wrt to XLC, below is the error for which we removed inline.
>
> Later, the build and tests passed for both XLC(16.1.0.18) and gcc(12) as
> well.
I think what you should do next is aggressively trim anything that does
not apply to current versions of AIX or the current compiler.
For example,
+ # Old xlc versions (<13.1) don't have support for -qvisibility. Use
expfull to force
+ <para>
+ <productname>AIX</productname> versions before 7.1 are no longer
+ tested nor supported by the <productname>PostgreSQL</productname>
+ community.
+ </para>
(Probably most of that section needs to be retested and rewritten.)
+ # Native memset() is faster, tested on:
+ # - AIX 5.1 and 5.2, XLC 6.0 (IBM's cc)
+ # - AIX 5.3 ML3, gcc 4.0.1
+ memset_loop_limit = 0
+ # for the base executable (AIX 4.2 and up)
+ * "IBM XL C/C++ for AIX, V12.1" miscompiles, for 32-bit, some inline
One of the reasons that the AIX port ultimately became unmaintainable
was that so many hacks and caveats were accumulated over the years. A
new port should set a more recent baseline and trim all those hacks.
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