Re: plperl: update ppport.h and fix configure version check

=?utf-8?Q?Dagfinn_Ilmari_Manns=C3=A5ker?= <ilmari(at)ilmari(dot)org> writes:
> Daniel Gustafsson <daniel(at)yesql(dot)se> writes:
>> 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).

We do have a couple of buildfarm animals on AIX 7.1, but nothing older.
The other systems you mention are surely dead and buried.

Interestingly, although cpan's table says AIX 7.1 shipped with perl
5.10.1, what's actually on those buildfarm animals is

tgl(at)gcc111:[/home/tgl]which perl
/usr/bin/perl
tgl(at)gcc111:[/home/tgl]ls -l /usr/bin/perl
lrwxrwxrwx 1 root system 29 Nov 09 2020 /usr/bin/perl -> /usr/opt/perl5/bin/perl5.28.1

Hard to tell if that is a local update or official IBM distribution.

> 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.

So 6.1 will be five years out of support by the time we release PG 15.
I'm inclined to just update the docs to say we don't support anything
older than 7.1.

regards, tom lane