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<p class="MsoNormal"><o:p> </o:p></p>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi Even<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">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)<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US">The compilation of cpl_multiproc.cpp depends on several compilation flags :<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">CPL_MULTIPROC_STUB<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">CPL_MULTIPROC_WIN32<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">CPL_MULTIPROC_PTHREAD<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">CPL_MULTIPROC_NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If none of them is defined, then CPL_MULTIPROC_STUB is defined automatically which means that multithreading is disabled (thread creation does not work).<o:p></o:p></span></p>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">I am using windows binaries of gdal I get from this site : </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a href="https://www.gisinternals.com/release.php"><span lang="EN-US" style="color:windowtext">GISInternals Support Site</span></a><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">It seems that none of these symbols have been defined for this build process<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">I guess I would have to recompile gdal in order to enable multithreading…<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Christophe<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></pre>
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