<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Our Mac instances must use the Apple-provided compiler I suppose.
We also have a Linux CI config using a recent clang (from
<a class="moz-txt-link-freetext" href="Fedora:rawhide">Fedora:rawhide</a>, so cutting edge)</p>
<p>OpenMP detection is done through the CMake provided FindOpenMP
module:
<a class="moz-txt-link-freetext" href="https://cmake.org/cmake/help/latest/module/FindOpenMP.html">https://cmake.org/cmake/help/latest/module/FindOpenMP.html</a></p>
<p>But I would expect your compiler to support it although it is not
cutting edge.</p>
<p>You can explicitly disable it by setting -DGDAL_USE_OPENMP=OFF</p>
<div class="moz-cite-prefix">Le 05/01/2026 à 18:41, Andrew Bell a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CACJ51z2_ScRCbKgmLNqzg4SS70xSZKzK9_mOaaj9-34CALFEWA@mail.gmail.com">
<div dir="ltr">
<div dir="ltr">Hi,<br>
<br>
It looks like CI is way ahead of my config. Are you using an
Apple-provided compiler or one from clang or elsewhere?</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">[sd-integration] (gdal) $ clang++ --version<br>
Apple clang version 14.0.3 (clang-1403.0.22.14.1)<br>
Target: x86_64-apple-darwin22.5.0<br>
Thread model: posix<br>
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin</div>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Mon, Jan 5, 2026 at
12:32 PM Even Rouault <<a
href="mailto:even.rouault@spatialys.com"
moz-do-not-send="true" class="moz-txt-link-freetext">even.rouault@spatialys.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote">
<div>
<p>Hi Andrew,</p>
<p>openmp is enabled when available since
<a
href="https://github.com/OSGeo/gdal/commit/2a3f06b90f2d68da446451a44090aa38fd6f4b5a#diff-c6d7b93ff4bf010c2c6218c9329af9afb9a00aab7871175046a9b50f26826452R435"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/OSGeo/gdal/commit/2a3f06b90f2d68da446451a44090aa38fd6f4b5a#diff-c6d7b93ff4bf010c2c6218c9329af9afb9a00aab7871175046a9b50f26826452R435</a>
. What is your clang version ? That warning are not
shown on our clang based CI configurations up to now.</p>
</div>
</blockquote>
<blockquote class="gmail_quote">
<div>
<p>Even</p>
<div>Le 05/01/2026 à 18:25, Andrew Bell via gdal-dev a
écrit :<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi,<br>
<br>
I updated to the latest master and am now seeing the
following warning during compilation:<br>
<br>
[156/1486] Building CXX object
alg/CMakeFiles/alg.dir/thinplatespline.cpp.o<br>
clang: warning: argument unused during compilation:
'-Xclang -fopenmp' [-Wunused-command-line-argument]<br>
<br>
If anyone has some info on this, please let me know.<br>
<br>
</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature">
<div dir="ltr">
<div>Andrew Bell</div>
<a href="mailto:andrew.bell.ia@gmail.com"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">andrew.bell.ia@gmail.com</a></div>
</div>
</div>
<br>
<fieldset></fieldset>
<pre>_______________________________________________
gdal-dev mailing list
<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">gdal-dev@lists.osgeo.org</a>
<a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a>
</pre>
</blockquote>
<pre cols="72">--
<a href="http://www.spatialys.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
</div>
</blockquote>
</div>
<div><br>
</div>
<div><br>
</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature">
<div dir="ltr">
<div>Andrew Bell</div>
<a href="mailto:andrew.bell.ia@gmail.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">andrew.bell.ia@gmail.com</a></div>
</div>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
</body>
</html>