[postgis-devel] Proposal: drop support for libproj < 6.1 in PostGIS 3.3.0

[Regina Obe]

> On Fri, Feb 11, 2022 at 06:44:02PM -0500, Regina Obe wrote:
> > Your subject lines says  < 6.1 but you say < 7.1 Which one is it?
> >
> > I'm okay with dropping < 6.1 but not so much with < 7
> 
> I started the mail thinking < 6.1 as that's what the code requires, but
when I
> saw Debian 11 shipping 7 I though why go with minor number when we can
> use major ?
> 
> May I ask what makes you want 6.1+ included ?
> 
> --strk;
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[Regina Obe] 

Cause on my Ubuntu 20.04, I have this from apt.postgresql.org, which I think
is the latest offered for latest LTS.

PostgreSQL 14.1 (Ubuntu 14.1-2.pgdg20.04+1) on x86_64-pc-linux-gnu, compiled
by gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, 64-bit

POSTGIS="3.2.0 c3e3cc0" [EXTENSION] PGSQL="140" GEOS="3.8.0-CAPI-1.13.1 "
PROJ="6.3.1" LIBXML="2.9.10" LIBJSON="0.13.1" LIBPROTOBUF="1.3.3"
WAGYU="0.5.0 (Internal)"

And given that Ubuntun 22.04 isn't out yet and most people wait for a year
or two before upgrading.  
I feel there will be a lot of folks stuck on PROJ 6.3 that would like to
move to PostgreSQL 15 and PostGIS 3.3.0 when it comes out.

apt.postgresql.org always gets it's dependencies from upstream. Which means
each version of Ubuntu will have a different version of PROJ.

Plus it just seems too cruel drop 2 major versions -- you'd be deprecating
5s and 6s together.

Thanks,
Regina