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<p class="MsoNormal"><span style="font-size:11.0pt">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">    This question is related to this conda-forge GDAL issue and is less of a general GDAL issue:<o:p></o:p></span></p>
<p class="MsoNormal"><a href="https://github.com/conda-forge/gdal-feedstock/issues/323">https://github.com/conda-forge/gdal-feedstock/issues/323</a><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’m bringing this up on this forum for some advice. Conda-forge packages are currently being built on images with kernel versions that support userfaultfd capability and I’m interested in having the vsis3
 capability for netcdf formats being available as part of the conda GDAL distribution.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Conda-forge uses centos6 images to build the packages and this does not include the linux/userfaultfd.h header. However, the kernel version supports the capability and there are many projects like qemu that
 distribute this file as part of their own distribution. If I were to do the same for gdal-feedstock<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">Is there a preferred source of linux/userfaultfd.h that I should use? I can probably pull this file from qemu if needed.
<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">If I use this header for compilation, I should probably install this as wellin conda/include for consistency. Any suggestions / comments?<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">Is there a plan to include this simpler header file within GDAL?
<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Piyush<o:p></o:p></span></p>
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