From: =?utf-8?Q?Dagfinn_Ilmari_Manns=C3=A5ker?= <ilmari@ilmari.org>
To: Daniel Gustafsson <daniel@yesql.se>
Cc: Tom Lane <tgl@sss.pgh.pa.us>,  pgsql-hackers@postgresql.org
Subject: Re: plperl: update ppport.h and fix configure version check
References: <87y278s6iq.fsf@wibble.ilmari.org>
	<4028442.1633403571@sss.pgh.pa.us>
	<D3D2BEBD-1F53-4BF9-95EA-80DAAE92FB47@yesql.se>
Date: Tue, 05 Oct 2021 10:59:02 +0100
In-Reply-To: <D3D2BEBD-1F53-4BF9-95EA-80DAAE92FB47@yesql.se> (Daniel
	Gustafsson's message of "Tue, 5 Oct 2021 09:41:08 +0200")
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Daniel Gustafsson <daniel@yesql.se> writes:

>> On 5 Oct 2021, at 05:12, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
>> In short: (a) we're not testing against anything older than 5.8.3
>> and (b) it seems quite unlikely that anybody cares about 5.8.x anyway.
>> So if we want to mess with this, maybe we should set the cutoff
>> to 5.8.3 not 5.8.1.
>
> Not being able to test against older versions in the builfarm seems like a
> pretty compelling reason to set 5.8.3 as the required version.

Looking at the list of Perl versions shipped with various OSes
(https://www.cpan.org/ports/binaries.html), bumping the minimum
requirement from 5.8.1 to 5.8.3 will affect the following OS versions,
which shipped 5.8.1 or 5.8.2:

AIX: 5.3, 6.1
Fedora: 1 (Yarrow)
macOS: 10.3 (Panther)
Redhat: 2.1
Slackware: 9.0, 9.1
OpenSUSE: 8.2

The only one of these that I can imagine we might possibly care about is
AIX, but I don't know what versions we claim to support or people
actually run PostgreSQL on (and want to upgrade to 15).  The docs at
https://www.postgresql.org/docs/current/installation-platform-notes.html
just say that "AIX versions before about 6.1 […] are not recommended".

For reference, 6.1 was released on 2007-11-09 and EOL on 2017-04-30, and
7.1 was released on 2010-09-10 and is supported until 2023-04-30.

- ilmari