Installation and Deployment

https://forums.gentoo.org/viewtopic-t-1118830-start-0.html

Hi, To add to @AxelVienna: static builds and GPL/LGPL have implication with custom builds you can reduce the size of the deployment you can customize some flags/dependencies It also depends on your use cases and targets.

Hi, The build system for Qt 6 is cmake. You can still use qmake for your projects though.

Hi and welcome to devnet, Might be a silly question but are you sure you are using the right kit when building your application with web engine ?

@Mark81 I don't know the correct ODBC string for you and would need to google around. But it's the same as you want to open an odbc connection on windows and at least not a path to a qt plugin.

@newbeee said in Something wrong when I installed qt in CenterOS8: yum -y install libxcb-devel That is the one for libxcb itself. The other librairies you have issues with have their own development package that you need to install.

@lck2000 said in Qt and OpenSSL Vuluerabilities Impact on Qt Insteller Framework: @sierdzio But the Qt Installer Framework I use relies on these ,and i haven't found a way to update them yet. You can recompile Qt Installer Framework yourself. It's not a convenient solution, I know.

@tomsmith said in QT QPSQL compile driver MSVC 2019 64: t was necessary to run C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvars64.bat then compilation is performed without errors. This is what I told you ... open the MSVC developer command prompt

Whether old and new installer can coexist though - I doubt it but surely you can try.

@sierdzio said in Installation failed using online installer: choosing mirrors seems to be not possible anymore Previously, an unofficial method was required. Now, an official method is supported: https://wiki.qt.io/Online_Installer_4.x#Selecting_a_mirror_for_opensource

@eyllanesc thanks, that solved the problem...

it is likely you are using wayland, not X11 Switch from Wayland to Xorg in Ubuntu At the login screen click on the cog icon beside the “Sign In” button. Select the option “Ubuntu on Xorg.” Enter your password and log in to your Ubuntu machine.

@Nikolay_spb said in qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in: yes, i have desktop manager Would be nice to mention which one. Is X server running or do you use something else (like Wayland)?

@szerwi please uninstall using control panel

Ok thanks that worked.

@raven-worx thanks, I was able to compile! Out of curiosity, is there a script for Linux to export all the relevant environment variables like in Windows (the "Qt Console") ? I spent a couple of hours to figure out why it cannot find the tools (CMake and Ninja). Then I had to export their paths and finally it compiled.

@jsulm so far I tried to build a simple QtWidget "Hello world" application on my dev machine. Then I copied it to the target with this structure: $ tree . ├── test_qt6 │   └── bin │   ├── test_qt6 │   └── platforms │   └── libqeglfs.so ├── qt6_libs │ ├── libicudata.so │ ├── libicudata.so.56 │ ├──libicudata.so.56.1 │ ├──libicui18n.so │ ├──libicui18n.so.56 │ ├──libicui18n.so.56.1 │ ├── but running the application with: LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/user/qt6_libs /home/user/test_qt6/bin/./test_qt6 -platform eglfs it still searches for x11: ./test_qt6: error while loading shared libraries: libxkbcommon.so.0: cannot open shared object file: No such file or directory ps. sorry but the editor loses the indentation. The platform plugin file is actually inside the platforms directory UPDATE I tried to copy the missing library, now ldd finds all. But still does not run: EGLFS: Failed to open /dev/fb0 EGLFS: Can't continue without a display I'm working to check the permissions.... fixed. $ export QT_QPA_PLATFORM=eglfs $ export QT_QPA_EGLFS_FB=/dev/fb0 $ LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/user/qt6_libs ./test_qt6 -platform eglfs Could not initialize egl display Aborted (core dumped)