[geos-devel] mingw64 file libs changed

[Sandro Mani]

Can you point me to the Makefile / ... which is doing this linking? It 
should never be necessary to point to a versioned shared library name in 
a link command line. Static libraries are unversioned, and for the 
dynamic libraries the corresponding import libraries are also unversioned.

Sandro

On 14.06.22 18:21, Regina Obe wrote:
> In my case, I need the c++ library statically linked into the geos C-api.
> I need the geos c-API shared but not the c++ one.  The main reason for need
> of c-api shared is all the extensions I ship rely on that.
> So I don't want both statically linked.
>
> Also for regression testing I do want to replace the c-lib without having to
> recompile all my extensions.
>
> Dan and strk had suggested a way to have the c++ be object .a so it can be
> statically linked to the c lib.
> I'm not sure how to do that in Cmake or if it is even currently possible.
>
> So Sandro - my annoyance with your change is now I have this extra c++ lib
> to worry about which was always a static name before and now is changing
> with each micro release.
>
> Thanks,
> Regina
>
>
>> -----Original Message-----
>> From: geos-devel [mailto:geos-devel-bounces at lists.osgeo.org] On Behalf Of
>> Sandro Mani
>> Sent: Tuesday, June 14, 2022 8:00 AM
>> To: Roger.Bivand at nhh.no; GEOS Development List <geos-
>> devel at lists.osgeo.org>
>> Subject: Re: [geos-devel] mingw64 file libs changed
>>
>> Just a note: library versioning only applies to shared libraries, static
> libraries
>> are unversioned. And FWIW, import libraries are also unversioned. So no
> link
>> command should be affected (unless you are linking against the dll shared
>> library rather than the dll.a import library).
>>
>> Sandro
>>
>> On 14.06.22 12:59, Roger Bivand wrote:
>>> In R >= 4.2, Windows static linked binary packages linking to GEOS use
>>> MXE, locally updating the MXE use of GEOS 3.6.2 to 3.9.1:
>>>
>>> https://svn.r-project.org/R-dev-web/trunk/WindowsBuilds/winutf8/ucrt3/
>>> toolchain_libs/mxe/src/geos.mk
>>>
>>>
>>> We currently hot-patch geos-config to modify it for static libs:
>>>
>>> https://svn.r-project.org/R-dev-web/trunk/WindowsBuilds/winutf8/ucrt3/
>>> toolchain_libs/mxe/src/geos-1-fixes.patch
>>>
>>>
>>> We could hot-patch files in a GEOS >= 3.11.0 tarball to remove
>>> instructions creating versioned libraries, but have not yet tested
>>> RC1. R packages also need to list static linked libraries by name, and
>>> revising each of a dozen or so at each GEOS release would be error
> prone.
>>> Is a cmake option a way to satisfy both those needing versioned, or
>>> unversioned library names?
>>>
>>> Does anyone else use MXE; if so, might it make sense to feed changes
>>> in GEOS forward to MXE?
>>>
>>> Best wishes,
>>>
>>> Roger
>>>
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