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    <p>QwtPlotCurve sounds like you are missing QWT? This is documented
      in the up-to-date documentation at
      <a class="moz-txt-link-freetext" href="https://github.com/qgis/QGIS/blob/master/INSTALL.md#2-overview">https://github.com/qgis/QGIS/blob/master/INSTALL.md#2-overview</a> and
      has been written in that document for at least two years.<br>
    </p>
    <div class="moz-cite-prefix">Am 21.12.22 um 16:04 schrieb Deimer
      Caldera via QGIS-Developer:<br>
    </div>
    <blockquote type="cite"
cite="mid:18535372175.d2bbc2141597152.328886512066256567@blacksquare.com.co">
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      <div style="font-family: Verdana, Arial, Helvetica, sans-serif;
        font-size: 10pt;">
        <div>I have tried to build qgis from source with this document <a
            target="_blank"
            href="https://github.com/qgis/QGIS/blob/ltr-3_22/INSTALL.md"
            moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/qgis/QGIS/blob/ltr-3_22/INSTALL.md</a> but
          I got many errors. Recently I found this guide<br>
        </div>
        <div><a target="_blank"
href="https://www.mail-archive.com/qgis-developer@lists.osgeo.org/msg52306.html"
            moz-do-not-send="true" class="moz-txt-link-freetext">https://www.mail-archive.com/qgis-developer@lists.osgeo.org/msg52306.html</a> but
          the build gives me some errors (error LNK2019: unresolved
          external symbol).<br>
        </div>
        <div><br>
        </div>
        <div>
          <div>..\qgis-3.22.13\out\build\x64-Release\qgsrasterhistogramwidget.cpp.obj
            : error LNK2019: unresolved external symbol
            "__declspec(dllimport) public: void __cdecl
            QwtPlotCurve::setSamples(class QVector<class QPointF>
            const &)"
            (__imp_?setSamples@QwtPlotCurve@@QEAAXAEBV?$QVector@VQPointF@@@@@Z)
            referenced in function "public: void __cdecl
            QgsRasterHistogramWidget::refreshHistogram(void)"
            (?refreshHistogram@QgsRasterHistogramWidget@@QEAAXXZ)<br>
          </div>
          <div><br>
          </div>
          <div>..\qgis-3.22.13\out\build\x64-Release\qgscurveeditorwidget.cpp.obj
            : error LNK2001: unresolved external symbol
            "__declspec(dllimport) public: void __cdecl
            QwtPlotCurve::setSamples(class QVector<class QPointF>
            const &)"
            (__imp_?setSamples@QwtPlotCurve@@QEAAXAEBV?$QVector@VQPointF@@@@@Z)<br>
          </div>
          <div><br>
          </div>
          <div>..\qgis-3.22.13\out\build\x64-Release\qgsgradientcolorrampdialog.cpp.obj
            : error LNK2001: unresolved external symbol
            "__declspec(dllimport) public: void __cdecl
            QwtPlotCurve::setSamples(class QVector<class QPointF>
            const &)"
            (__imp_?setSamples@QwtPlotCurve@@QEAAXAEBV?$QVector@VQPointF@@@@@Z)<br>
          </div>
          <div><br>
          </div>
          <div>..\qgis-3.22.13\out\build\x64-Release\qgsrasterhistogramwidget.cpp.obj
            : error LNK2019: unresolved external symbol
            "__declspec(dllimport) public: void __cdecl
            QwtPlotHistogram::setSamples(class QVector<class
            QwtIntervalSample> const &)"
(__imp_?setSamples@QwtPlotHistogram@@QEAAXAEBV?$QVector@VQwtIntervalSample@@@@@Z)
            referenced in function "public: void __cdecl
            QgsRasterHistogramWidget::refreshHistogram(void)"
            (?refreshHistogram@QgsRasterHistogramWidget@@QEAAXXZ)<br>
          </div>
          <div><br>
          </div>
          <div>..\qgis-3.22.13\out\build\x64-Release\qgscurveeditorwidget.cpp.obj
            : error LNK2001: unresolved external symbol
            "__declspec(dllimport) public: void __cdecl
            QwtPlotHistogram::setSamples(class QVector<class
            QwtIntervalSample> const &)"
(__imp_?setSamples@QwtPlotHistogram@@QEAAXAEBV?$QVector@VQwtIntervalSample@@@@@Z)<br>
          </div>
          <div><br>
          </div>
          <div>..\qgis-3.22.13\out\build\x64-Release\qgshistogramwidget.cpp.obj
            : error LNK2001: unresolved external symbol
            "__declspec(dllimport) public: void __cdecl
            QwtPlotHistogram::setSamples(class QVector<class
            QwtIntervalSample> const &)"
(__imp_?setSamples@QwtPlotHistogram@@QEAAXAEBV?$QVector@VQwtIntervalSample@@@@@Z)<br>
          </div>
          <div><br>
          </div>
          <div>..\qgis-3.22.13\out\build\x64-Release\output\bin\qgis_gui.dll
            : fatal error LNK1120: 2 unresolved externals<br>
          </div>
          <div><br>
          </div>
          <div>
            <pre style="white-space: pre-wrap; margin-top: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; vertical-align: baseline; box-sizing: inherit; width: auto; max-height: 600px; overflow: auto;"><span class="highlight" style="background-color:rgb(249, 248, 246)"><span class="colour" style="color: rgb(35, 38, 41); white-space: normal;"><span class="font" style="font-family:arial, sans-serif">Am I missing a package to install?</span></span></span>
</pre>
            <div>Is there any updated documentation to make the build
              successful?<br>
            </div>
            <div><br>
            </div>
            <div>Thank you so much for your attention.<br>
            </div>
          </div>
          <div><br>
          </div>
        </div>
        <div><br>
        </div>
      </div>
      <br>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
    </blockquote>
    <pre class="moz-signature" cols="72">-- 
Johannes Kröger / GIS-Entwickler/-Berater

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