Re: Remove support for old realpath() API

On Mon, Aug 12, 2024 at 6:18 PM Peter Eisentraut <peter(at)eisentraut(dot)org> wrote:
> On 05.08.24 09:41, Heikki Linnakangas wrote:
> > On 05/08/2024 09:12, Peter Eisentraut wrote:
> >> The now preferred way to call realpath() is by passing NULL as the
> >> second argument and get a malloc'ed result. We still supported the
> >> old way of providing our own buffer as a second argument, for some
> >> platforms that didn't support the new way yet. Those were only
> >> Solaris less than version 11 and some older AIX versions (7.1 and
> >> newer appear to support the new variant). We don't support those
> >> platforms versions anymore, so we can remove this extra code.

I checked this in the AIX 7.3 manual and the POSIX 2008 way does not
appear to be mentioned there:

https://www.ibm.com/docs/en/aix/7.3?topic=r-realpath-subroutine

That's a bit confusing, or maybe there are just too many versioning
systems to keep track of and I've made a mistake, because it looks
like AIX 7.2.5+ has actual certification for Unix V7 AKA SUSv4 AKA
POSIX 2008... Or maybe the documentation is wrong and it does
actually work. I guess the IBM crew will be forced to look into this
as they continue to work on their PostgreSQL/AIX patch, if it doesn't
work...