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

Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

> 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.

Looks like they update the Perl version in OS updates and service packs:
https://www.ibm.com/support/pages/aix-perl-updates-and-support-perlrte

>> 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.

And PG 14 will be supported until nine years after the 6.1 EOL date.

> I'm inclined to just update the docs to say we don't support anything
> older than 7.1.

I concur.

- ilmari