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    <div class="moz-cite-prefix">Le 19/06/2023 à 20:44, Hugh Kelley a
      écrit :<br>
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        <div>OK thanks, exactly the general guidance I was looking for.
          I'll look into upgrading. Is there currently a version that
          makes things easiest?</div>
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    <p>QGIS continuous integration uses:</p>
    <p>- ubuntu 22.04 for QT5 builds:
<a class="moz-txt-link-freetext" href="https://github.com/qgis/QGIS/blob/master/.docker/qgis3-qt5-build-deps.dockerfile">https://github.com/qgis/QGIS/blob/master/.docker/qgis3-qt5-build-deps.dockerfile</a></p>
    <p>- Fedora 38 for QG6 builds:
<a class="moz-txt-link-freetext" href="https://github.com/qgis/QGIS/blob/master/.docker/qgis3-qt6-build-deps.dockerfile">https://github.com/qgis/QGIS/blob/master/.docker/qgis3-qt6-build-deps.dockerfile</a><br>
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    <blockquote type="cite"
cite="mid:CAOrcXHE57UyWvbSitkWz=-fmZBbc7L3eVZZSsfFQygMM3y3FUA@mail.gmail.com">
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        <div dir="ltr" class="gmail_attr">On Mon, Jun 19, 2023 at
          2:34 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>
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            <p>Building recent QGIS versions on 20.04 is going to be
              quite a lot of pain since you'll need indeed to have a qt
              5.15 build, and all the other auxiliary QT based
              dependencies build against it.<br>
            </p>
            <p>I'd suggest you update to 22.04 at least. Or if you don't
              want to do development but can live with released
              versions, try conda-forge builds (cf <a
                href="https://plugins.qgis.org/planet/tag/conda/"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">https://plugins.qgis.org/planet/tag/conda/</a>)<br>
            </p>
            <div>Le 19/06/2023 à 20:30, Hugh Kelley via QGIS-Developer a
              écrit :<br>
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                <div>Hi all,</div>
                <div><br>
                </div>
                <div>while working on compiling qgis on ubuntu using
                  these instructions [0] , i've run into an error while
                  running cmake that "QRecursiveMutex" is not found. <br>
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                <div><br>
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                <div>It looks like that became available in QT 5.14. <br>
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                <div><br>
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                <div>Ubuntu 20.04 installs QT 5.12. During my searches
                  i've seen comments that imply 5.15 might not be
                  available for 20.04.  I'm trying to figure out whether
                  I should be trying to upgrade Qt, if I have to upgrade
                  Ubuntu, or if there is some option in the compilation
                  process that can resolve this for me. <br>
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                <div><br>
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                <div>I've installed Qt 5.15.2 to /opt/ and added it to
                  PATH, but qtdiag still indicates i'm using 5.12.x<br>
                </div>
                <div><br>
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                <div>I thought i'd start by asking here before asking on
                  a Qt general forum in case there's a qgis specific
                  solution.</div>
                <div><br>
                </div>
                <div>I've also set the cmake 3d option to "no" which got
                  me around the absence of q qt 3d extras pacakge/file. 
                  So maybe there's a similar solution for this although
                  this version problem seem more essential. <br>
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                <div>Thanks for any suggestions!<br>
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                <div>[0] <a
                    href="https://github.com/qgis/QGIS/blob/master/INSTALL.md"
                    target="_blank" moz-do-not-send="true"
                    class="moz-txt-link-freetext">https://github.com/qgis/QGIS/blob/master/INSTALL.md</a></div>
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                <span class="gmail_signature_prefix">-- </span><br>
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                            <div dir="ltr">Hugh Kelley       <br>
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              <pre>_______________________________________________
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            <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>
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      <span class="gmail_signature_prefix">-- </span><br>
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                  <div dir="ltr">Hugh Kelley       <br>
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    <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>
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