Re: Exposing PG_VERSION_NUM in pg_config

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Exposing PG_VERSION_NUM in pg_config
Date: 2015-07-05 15:07:23
Message-ID: CAFj8pRDOA4hoqM3eCsDFxobUS4SDH0ZuBTMcX-x_dj==i5HV9Q@mail.gmail.com
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2015-07-05 16:51 GMT+02:00 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:

> Michael Paquier <michael(dot)paquier(at)gmail(dot)com> writes:
> > On Fri, Jul 3, 2015 at 6:27 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >> Michael Paquier <michael(dot)paquier(at)gmail(dot)com> writes:
> >>> ... So attached is a patch that adds VERSION_NUM in
> >>> Makefile.global.
>
> >> While there was not exactly universal consensus that we need this, the
> >> patch as given is merely two lines, so it seems awfully cheap to Just
> >> Do It. Hence, I've gone ahead and committed it. If we start getting
> >> complaints about use-cases this doesn't cover, we can re-discuss whether
> >> it's worth doing more.
>
> > This looks fine to me. Thanks.
>
> After further thought I started wondering why I hadn't back-patched this.
> It's certainly safe/trivial enough for back-patching. If we leave it just
> in HEAD, then extension authors wouldn't be able to use it in the intended
> way until 9.5 is old enough that they don't care about supporting 9.5.x
> anymore; which is perhaps 5 years away. If we back-patch all supported
> branches then it would be safe to rely on VERSION_NUM for building
> extensions within a year or two.
>
> Any objections to doing that?
>

+1

Pavel

>
> regards, tom lane
>
>
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