I'm using Yocto buildsystem to create an image for raspberry pi that contains Qt5, but I'm having problems with configuring qtbase properly.
Due to those problems when I run Qt app I get an error:
This application failed to start because it could not find or load the Qt platform plugin "xcb" in "".
Available platform plugins are: eglfs, minimal, minimalegl, offscreen.
Reinstalling the application may fix this problem.
Aborted (core dumped)
On the other hand if I start my app like so:
myApp -platform eglfs
it works properly. The same if I set environment variable QT_QPA_PLATFORM=eglfs - it works.
How can I set my default platform to eglfs and not to xcb?
I have tried to set it like below (in my distro.conf):
DISTRO_FEATURES_remove = "x11"
DISTRO_FEATURES_append = " gles2"
PACKAGECONFIG_GL_pn-qtbase = "gles2"
PACKAGECONFIG_X11_pn-qtbase = ""
PACKAGECONFIG_pn-qtbase += "gles2"
PACKAGECONFIG_pn-qtbase += "dbus udev evdev widgets tools libs"
Unfortunately it did not help and my application still shows this error if I don't set platform explicitly.
all you have to do is:
in /etc/profile, add
export QT_QPA_PLATFORM=eglfs so that every time you logged in the machine, it will automatically does it for you.
Or if you do not know what your graphic backends is. The following is the corresponding
Backend: FB; XWayland; X11
GRAPHICS: eglfs; wayland-egl; xcb
export QT_QPA_PLATFORM=${GRAPHICS}