[gdal-dev] C# bindings compilation

[Paul Harwood]

Even et al.

Just to update - your latest changes as per 3670 have done the trick. I can
now build C# bindings on top of the GDAL3.2.2 conda distribution on
Windows, Mac and Linux and have successfully run them in .NET / mono.

I solved the compile time problems with a little judicious adjusting of the
compile-time environment and now have the basis for a package. I just need
a few more adjustments to make it more production-grade and then I will
submit it - particularly around tests and around run-time paths.

I don't expect a fast turn around from conda-forge. This package does not
exactly fall into one of their normal teams :)

Does anyone else want to volunteer to be on the maintainer list for the
package? Absolutely no work needed, you just the ability to deprecate if
the package gets very out of date.

On Mon, 12 Apr 2021 at 08:59, Paul Harwood <runette at gmail.com> wrote:

> Thanks Even
>
> On Sun, 11 Apr 2021 at 19:17, Even Rouault <even.rouault at spatialys.com>
> wrote:
>
>> Paul,
>>
>> RFCs are only required for substantial changes that affect the OSGeo/GDAL
>> repository. People who contribute to Conda Forge are free to do so
>> (hopefully in good faith, that is not defacing too much the GDAL "brand").
>> If we decided to retire the C# bindings from OSGeo/GDAL this should
>> probably go through some motion
>>
>
> Cool. I will do that then.
>
> I would prefer if the result is at least semi-official and to have some
> other people from the community listed as maintainers/owners on the package
> in case something happens to me. There are too many zombie packages out
> there already!
>
> Would that be you?
>
>> Regarding build issues on Linux, I could reproduce that, but was like
>> "worked half time". I finally realized that you had to run "make" twice
>> because of oddities in the Makefile dependency rules. And there was the
>> base swig/SWIGmake.base file generating .cpp files in swig/csharp whereas
>> swig/csharp/GNUmakefile generated them in swig/csharp/gdal|const|ogr|osr.
>> I've hopefully addressed and rationalized that in
>> https://github.com/OSGeo/gdal/pull/3670. At least now on my local
>> machine (ubuntu 20.04), one a clean swig/csharp, "cd swig/csharp && make &&
>> make test" works. The error you got was similar to the one I got
>>
> It is good to able to see that it works and a working example. I will work
> with what you have in 3670
>
>> Regarding your compilation issues with your current recipee, I'd expect
>> you to have to rather copy most of the content of swig/include,
>> swig/include/csharp and swig/csharp in your own repository and adapt them
>> to a standalone build where you include and link against an installed
>> prefix of the native libgdal.
>>
>
>  That is sort of where I am heading. I want to avoid having anything
> between the conda feedstock and the root GDAL repo (unless and until there
> is any change to the way that the GDAL project manages bindings) for
> maintenance reasons and to avoid creating more zombies. I.e. there is only
> one definition of the SWIG objects but I have my own makefiles.
>
>>
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