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error on build for qwt 6.1.6

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  • S Offline
    S Offline
    stdave
    wrote on last edited by
    #1

    Version: Qt 5.15.2
    OS: Ubuntu 20.04.2
    QWT 6.1.6

    I have been attempting install of QWT with version 6.1.6 (get same problem with 6.1.3)

    Issued qmake with no error on directory.
    On make I get this in the display at beginning of build;

    $ make
    cd src/ && ( test -e Makefile || /usr/local/Qt/6.0.1/gcc_64/bin/qmake -o Makefile /home/david/Downloads/qwt-6.1.6/src/src.pro ) && make -f Makefile
    make[1]: Entering directory '/home/david/Downloads/qwt-6.1.6/src'
    compiling qwt_clipper.cpp
    qwt_clipper.cpp: In member function ‘QVector<QwtInterval> QwtCircleClipper::clipCircle(const QPointF&, double) const’:
    qwt_clipper.cpp:354:9: error: ‘qSort’ was not declared in this scope; did you mean ‘qSqrt’?
    354 | qSort( angles );
    | ^~~~~
    | qSqrt
    make[1]: *** [Makefile:4637: obj/qwt_clipper.o] Error 1
    make[1]: Leaving directory '/home/david/Downloads/qwt-6.1.6/src'
    make: *** [Makefile:50: sub-src-make_first-ordered] Error 2

    I have searched forums for same error and have come up with nothing.
    I followed the installation instructions like so;

    /usr/local/Qt/6.0.1/gcc_64/bin/qmake qwt.pro

    then

    make

    As I mentioned I get the identical error with both qwt versions 6.1.6 and 6.1.3.
    Any pointers or suggestions would be welcome.

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    • S Offline
      S Offline
      stdave
      wrote on last edited by
      #2

      This particular error may be because qSort is apparently now obsolete. It has been replaced with std::sort
      That said I am still running into errors - I'm now running into this error;

      $ make
      cd src/ && ( test -e Makefile || /usr/local/Qt/6.0.1/gcc_64/bin/qmake -o Makefile /home/david/Downloads/qwt-6.1.3/src/src.pro ) && make -f Makefile
      make[1]: Entering directory '/home/david/Downloads/qwt-6.1.3/src'
      compiling qwt_date.cpp
      qwt_date.cpp: In static member function ‘static int QwtDate::utcOffset(const QDateTime&)’:
      qwt_date.cpp:715:32: error: ‘const class QDateTime’ has no member named ‘utcOffset’
      715 | seconds = dateTime.utcOffset();
      | ^~~~~~~~~
      make[1]: *** [Makefile:4922: obj/qwt_date.o] Error 1
      make[1]: Leaving directory '/home/david/Downloads/qwt-6.1.3/src'
      make: *** [Makefile:50: sub-src-make_first-ordered] Error 2
      david@david-X510UAR:~/Downloads/qwt-6.1.3$

      As before - any suggestions would be helpful - on my own here, trial-and-erroring myself to death.

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #3

        Hi,

        From this feature request, you should use the 6.2 branch.

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • S Offline
          S Offline
          stdave
          wrote on last edited by
          #4

          Ok - thanks for that. So I am now compiling and installing without errors. Next step is to get the qwt widgets to appear in Qt.
          Here is where I stand;
          Compiled and installed Qt into /usr/local/Qt version 5.15.2
          Compiled qwt version (6.2.0) - using /usr/local/Qt/5.15.2/gcc_64/bin/qmake (checked using -v is 5.15.2)
          Installed qwt into /usr/local/qwt-6.2.0-svn

          This is a startup script I am using to get Qt up and running from the shell (so I can get some info)

          QMAKEFEATURES=/usr/local/qwt-6.2.0-svn/features
          QT_PLUGIN_PATH="/usr/local/qwt-6.2.0-svn/plugins:/usr/local/Qt/5.15.2/gcc_64/plugins"
          QTDIR=/home/david/Qt
          export QTDIR
          export QT_PLUGIN_PATH
          export QMAKEFEATURES
          export QT_DEBUG_PLUGINS=1
          /usr/local/Qt/Tools/QtCreator/bin/qtcreator

          I put the plugin at;
          /usr/local/Qt/5.15.2/gcc_64/plugins/designer/libqwt_designer_plugin.so

          Here's something I found on old forums so I also did the following;

          I inserted
          /usr/local/qwt-6.2.0-svn/lib
          into
          /etc/ld.so.conf.d/qwt.conf
          and updated with 'sudo ldconfig'

          When I execute my shell file, I get quite a bit output - sending that through "grep qwt" I get;

          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/platforms" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/platformthemes" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/platforminputcontexts" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/xcbglintegrations" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/styles" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/sqldrivers" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/iconengines" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/imageformats" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/accessible" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/accessiblebridge" ...
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qwt-6.2.0-svn/plugins/bearer" ...

          I feel like I'm close - but still not there -

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #5

            Qt Creator is not designer. Start the Qt 5.15.2 designer and you'll likely see the Qwt widgets there.

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • S Offline
              S Offline
              stdave
              wrote on last edited by
              #6

              OK - so, still closer, but a bug - I got this error;

              Cannot load library /usr/local/Qt/5.15.2/gcc_64/plugins/designer/libqwt_designer_plugin.so: (/usr/local/Qt/5.15.2/gcc_64/plugins/designer/libqwt_designer_plugin.so: undefined symbol: _ZN17QwtDesignerPlugin18PolarPlotInterface12createWidgetEP7QWidget)

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #7

                What do you get if you run ldd on the plugin ?

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • S Offline
                  S Offline
                  stdave
                  wrote on last edited by
                  #8

                  $ ldd libqwt_designer_plugin.so

                  linux-vdso.so.1 (0x00007ffe464c5000)
                  libqwt.so.6.2 => /usr/local/qwt-6.2.0-svn/lib/libqwt.so.6.2 (0x00007f25ce791000)
                  libQt5Designer.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5Designer.so.5 (0x00007f25ce08f000)
                  libQt5Widgets.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5Widgets.so.5 (0x00007f25cd82d000)
                  libQt5Gui.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5Gui.so.5 (0x00007f25ccefc000)
                  libQt5Core.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5Core.so.5 (0x00007f25cc706000)
                  libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f25cc510000)
                  libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f25cc4f3000)
                  libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f25cc301000)
                  libQt5Svg.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5Svg.so.5 (0x00007f25cc0aa000)
                  libQt5OpenGL.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5OpenGL.so.5 (0x00007f25cbe53000)
                  libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f25cbd04000)
                  libQt5Xml.so.5 => /usr/local/Qt/5.15.2/gcc_64/lib/libQt5Xml.so.5 (0x00007f25cbac6000)
                  libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f25cbaa1000)
                  libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f25cba19000)
                  libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f25cb9fd000)
                  libicui18n.so.56 => /usr/local/Qt/5.15.2/gcc_64/lib/libicui18n.so.56 (0x00007f25cb564000)
                  libicuuc.so.56 => /usr/local/Qt/5.15.2/gcc_64/lib/libicuuc.so.56 (0x00007f25cb1ac000)
                  libicudata.so.56 => /usr/local/Qt/5.15.2/gcc_64/lib/libicudata.so.56 (0x00007f25c97c7000)
                  libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f25c97c1000)
                  libgthread-2.0.so.0 => /lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f25c97bc000)
                  libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f25c9693000)
                  /lib64/ld-linux-x86-64.so.2 (0x00007f25ce983000)
                  libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f25c95db000)
                  libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f25c95a5000)
                  libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f25c9532000)
                  libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f25c93f5000)
                  libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f25c93cb000)
                  libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f25c93c5000)
                  libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f25c93bb000)
                  libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f25c93a1000)
                  
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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #9

                    You may have to check the plugin code to see if there's something missing.

                    By the way, weren't you building with Qt 6 ?

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    S 1 Reply Last reply
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                    • SGaistS SGaist

                      You may have to check the plugin code to see if there's something missing.

                      By the way, weren't you building with Qt 6 ?

                      S Offline
                      S Offline
                      stdave
                      wrote on last edited by stdave
                      #10

                      @SGaist said in error on build for qwt 6.1.6:

                      You may have to check the plugin code to see if there's something missing.

                      By the way, weren't you building with Qt 6 ?

                      Originally I was - but things take a lot of twists and turns - I was getting errors building with the qmake from Qt6 - but that was with an older version of qwt - I tried several versions of qwt - all had the same compile problem, so I switched to a different version of Qt and have had more progress (so it seems).

                      Where exactly is the plugin code ? Are you talking about, for instance my shell script file - or maybe that I have plugin installed in /usr/local/Qt/5.15.2/gcc_64/plugins/designer - not sure if that should be there.

                      Oh, wait - you mean qwt. I can check that the configuration files I have been through and have not seen a reason to modify. Any suggestions as to what to look at?

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #11

                        I would check the PolarPlot related stuff since it's from there that problem seems to be.

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                        • S Offline
                          S Offline
                          stdave
                          wrote on last edited by
                          #12

                          I recompiled qwt 6.2 with no errors. Tried a few different configuration. I removed the plugin file from within Qt.
                          Then I retried qwt-6.1.5 again and BINGO - the widgets are up and working. Thank you for your expert guidance on this.

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