[MDAL-Developer] MDAL driver modification

[Peter Petrik]

Hi Robson,

To check how to build MDAL on windows, you can take a hint from
https://github.com/lutraconsulting/MDAL/blob/master/.github/workflows/windows_tests.yml.
If you use different visual studio version, you may need some modification
of the code.

To test you modification, first of all, you should run the automatic test
suite for given driver. If that one passes, you can test in QGIS. If you
build QGIS yourself, there was an option to select yours external MDAL
installation to build against.

Kind Regards,
Peter Petrík
CPO of Mergin Maps
LI <https://www.linkedin.com/in/peter-petrik/>, Mergin Maps
<https://www.merginmaps.com>





On Mon, Aug 7, 2023 at 7:43 AM Robson Leo Pachaly <eng.pachaly at gmail.com>
wrote:

> Hi all,
>
> I'm trying to do some modifications on a MDAL driver. I have two
> questions. The first is about compiling the mdal.dll and the second is
> about the procedure for testing the modification.
>
> 1. I'm following exactly the build steps on the MDAL repository but I get
> some errors while building and no mdal.dll is being generated. The errors
> are the following:
>
> Error C3892 'wstr': you cannot assign to a variable that is const
> Error C2664 'int MultiByteToWideChar(UINT,DWORD,LPCCH,int,LPWSTR,int)':
> cannot convert argument 5 from 'const _Elem *' to 'LPWSTR'
> Error C2664 'int
> WideCharToMultiByte(UINT,DWORD,LPCWCH,int,LPSTR,int,LPCCH,LPBOOL)': cannot
> convert argument 5 from 'const _Elem *' to 'LPSTR'
> Error C1083 Cannot open include file: 'mdal_config.hpp': No such file or
> directory
>
> 2. The best way for testing the modification is to recompile QGIS with
> make option MDAL INTERNAL set to OFF and then change the mdal.dll?
>
> Thanks!
> _______________________________________________
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> MDAL-Developer at lists.osgeo.org
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>
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