[gdal-dev] Multiproc stub by default

[Even Rouault]

Christophe,

CPL_MULTIPROC_WIN32 is automatically set on Windows by 
https://github.com/OSGeo/gdal/blob/104e1747748d204e8aff1945464a24b1f8c94c90/port/cpl_multiproc.h#L43

Even

Le 04/07/2022 à 11:57, DELEPINE Christophe a écrit :
>
> Hi Even
> I have looked at cpl_multiproc.cpp implementation and I believe that I 
> cannot use multithreading for the mbtiles conversion (even if I define 
> GDAL_NUM_THREADS)
>
> The compilation of cpl_multiproc.cpp depends on several compilation 
> flags :
>
> ·CPL_MULTIPROC_STUB
>
> ·CPL_MULTIPROC_WIN32
>
> ·CPL_MULTIPROC_PTHREAD
>
> ·CPL_MULTIPROC_NONE
>
> If none of them is defined, then CPL_MULTIPROC_STUB is defined 
> automatically which means that multithreading is disabled (thread 
> creation does not work).
>
> I am using windows binaries of gdal I get from this site : 
> GISInternals Support Site <https://www.gisinternals.com/release.php>
> It seems that none of these symbols have been defined for this build 
> process
> I guess I would have to recompile gdal in order to enable multithreading…
> Regards
> Christophe

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