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

[Paul Ramsey]

> On Feb 11, 2022, at 4:19 PM, Regina Obe <lr at pcorp.us> wrote:
> 
>> 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)"
> 

This is kind of the place I feel blind. Like what are the extant proj versions at Ubunto 20, 18, 16... ?
I'm leery about turning off those old versions, because old proj is still so commonplace. I understand that to some extent we have to drive change, but within reason. There's a maximum amount of pain we want to cause weiged against benefit.

P



> 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
> 
> 
> 
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