From: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Subject: Re: Cygwin linking rules
To: Marco Atzeri <marco.atzeri@gmail.com>, pgsql-hackers@lists.postgresql.org
References: <1056.1538235347@sss.pgh.pa.us>
 <86419508-9d36-36a9-93ff-2a051af7d2e4@2ndQuadrant.com>
 <f82cc25e-3404-33b1-3a7b-93e5130e188e@2ndQuadrant.com>
 <257c24fc-effb-871d-4529-e3ff2ea0d436@gmail.com>
Message-ID: <fda91d8a-93ae-d7a5-a555-4a88d5783f36@2ndQuadrant.com>
Date: Sun, 30 Sep 2018 10:13:19 -0400
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On 09/29/2018 02:13 PM, Marco Atzeri wrote:
>
> building from git and using the attached patch that is used for all 
> cygwin packages on latest cygwin
>
> $ uname -svrm
> CYGWIN_NT-10.0 2.11.1(0.329/5/3) 2018-09-05 10:24 x86_64
>
> I do not see the problem
>
> ============== creating database "contrib_regression" ==============
> CREATE DATABASE
> ALTER DATABASE
> ============== running regression test queries ==============
> test paths                        ... ok
> test dblink                       ... ok
> ============== shutting down postmaster ==============
>
>
>  $ objdump -x usr/lib/postgresql/dblink.dll |grep "DLL Name:"
>         DLL Name: postgres.exe
>         DLL Name: cygpq-5.dll
>         DLL Name: cygwin1.dll
>         DLL Name: KERNEL32.dll
>


Yes. So there are a couple of things here. First, the dll has 
SO_MAJORVERSION in the name. And second it stops building any static 
libraries and instead builds windows import libraries with names like 
lippq.a.

I've tested this on both HEAD and REL9_3_STABLE and it works fine.

I think we should apply this to HEAD. If it's not too late it would 
probably be a good thing for release 11 - would need a release note.

cheers

andrew


-- 
Andrew Dunstan                https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services