I'm running 20.04 but after several tries I can not get gunplot to install properly wiht qt5. I followed the instructions from another Q/A:
sudo apt install qtbase5-dev qtbase5-dev-tools libqt5svg5-dev qttools5-dev-tools
cd ~
wget https://jaist.dl.sourceforge.net/project/gnuplot/gnuplot/5.4.1/gnuplot-5.4.1.tar.gz
tar -xvzf gnuplot-5.4.1.tar.gz
cd gnuplot-5.4.1
./configure --with-qt=qt5
make -j # uses more jobs for faster compiling and linking
make check # make a test before installing
But when running 'make check' if get pages of this (the formatting is wacky, but the text is correct):
Got keys from plugin meta data ("wayland-xcomposite-glx") QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so" Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "xcb" ] }, "archreq": 0, "className": "QXcbIntegrationPlugin", "debug": false, "version": 330752 }
Got keys from plugin meta data ("xcb") QFactoryLoader::QFactoryLoader() checking directory path "/home/dad/Downloads/gnuplot-5.4.1/src/platforms" ... loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqwayland-egl.so" Failed to create wl_display (No such file or directory) Using Wayland-EGL failed to initialize EGL display qt.qpa.plugin: Could not load the Qt platform plugin "wayland-egl" in "" even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
Warning: slow font initialization Warning: slow font initialization Warning: slow font initialization Warning: slow font initialization Warning: slow font initializationHit return to continue
I get blocks of the above text, one for each type of window e.g. wayland-egl.
It seems to me that the Qt5 in not installed properly, but I have installed, and re-installed a few times, but still get the above errors. Help.
