Qt for weston desktop

Wade

Dears

     I‘ve successfully cross-compiling Qt use the following configure:

#!/bin/sh
./configure \
-v \
-confirm-license \
-prefix /opt/qt5.9.6 \
-release \
-opensource \
-accessibility \
-make libs \
-xplatform linux-aarch64-gnu-g++ \
-pch \
-tslib \
-sqlite \
-qt-libjpeg \
-qt-libpng \
-qt-zlib \
-qt-freetype \
-opengl es2 \
-nomake examples -nomake tools \
-sysroot /home/wadexu/debian_buster_renesas_OpenGL_for_QT_15.1 \
-I /home/wadexu/debian_buster_renesas_OpenGL_for_QT_15.1/usr/include \
-L /home/wadexu/debian_buster_renesas_OpenGL_for_QT_15.1/usr/lib \
-L /home/wadexu/debian_buster_renesas_OpenGL_for_QT_15.1/usr/lib/aarch64-linux-gnu \
-L /home/wadexu/debian_buster_renesas_OpenGL_for_QT_15.1/lib

 My board system is running on a wayland/weston desktop. But when I run my Qt project Execute file, There is an error :

This application failed to start because it could not find or load the Qt platform plugin "wayland"
in "/opt/qt5.9.6/plugins".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, xcb.

Reinstalling the application may fix this problem.
Aborted

I checked my /opt/qt5.9.6/plugins/platforms. There do have the wayland related files:

/opt/qt5.9.6/plugins/platforms$ ls
libqeglfs.so    libqminimalegl.so  libqwayland-egl.so             libqxcb.so
libqlinuxfb.so  libqoffscreen.so   libqwayland-generic.so
libqminimal.so  libqvnc.so         libqwayland-xcomposite-egl.so

Is there something should I do still?

Thanks

Wade Xu

jsulm

@Wade Set QT_DEBUG_PLUGINS before starting your app and check the output (or post it here). See https://doc.qt.io/qt-5/debug.html

Wade

@jsulm said in Qt for weston desktop:

QT_DEBUG_PLUGINS

Hi，Jsulm

Sorry so late to reply，The following is my message after run ./app -platform wayland

build-QtDemo-Qt5_9_6_for_Arm64-Release# ./QtDemo -patform wayland
QFactoryLoader::QFactoryLoader() checking directory path "/opt/qt5.9.6/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release" ...
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/main.o"
"Failed to extract plugin meta data from '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/main.o'"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/Makefile"
QElfParser: '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/Makefile' is not an ELF object
"'/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/Makefile' is not an ELF object"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_predefs.h"
QElfParser: '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_predefs.h' is not an ELF object
"'/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_predefs.h' is not an ELF object"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_qwmainwindow.cpp"
QElfParser: '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_qwmainwindow.cpp' is not an ELF object
"'/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_qwmainwindow.cpp' is not an ELF object"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_qwmainwindow.o"
"Failed to extract plugin meta data from '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/moc_qwmainwindow.o'"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/QtDemo"
"Failed to extract plugin meta data from '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/QtDemo'"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/qwmainwindow.o"
"Failed to extract plugin meta data from '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/qwmainwindow.o'"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/ui_qwmainwindow.h"
QElfParser: '/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/ui_qwmainwindow.h' is not an ELF object
"'/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/ui_qwmainwindow.h' is not an ELF object"
         not a plugin
QFactoryLoader::QFactoryLoader() checking directory path "/opt/qt5.9.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqeglfs.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 329990
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqminimal.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqminimalegl.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqoffscreen.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqvnc.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 329990
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/opt/qt5.9.6/plugins/platforms/libqxcb.so"
Found metadata in lib /opt/qt5.9.6/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/tsinglin/build-QtDemo-Qt5_9_6_for_Arm64-Release/platforms" ...
Cannot load library /opt/qt5.9.6/plugins/platforms/libqwayland-generic.so: (libQt5WaylandClient.so.5: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/opt/qt5.9.6/plugins/platforms/libqwayland-generic.so" : "Cannot load library /opt/qt5.9.6/plugins/platforms/libqwayland-generic.so: (libQt5WaylandClient.so.5: cannot open shared object file: No such file or directory)"
This application failed to start because it could not find or load the Qt platform plugin "wayland"
in "/opt/qt5.9.6/plugins".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, xcb.

Reinstalling the application may fix this problem.
Aborted

Thanks & Best Regards
Wade Xu

jsulm

@Wade said in Qt for weston desktop:

Cannot load library /opt/qt5.9.6/plugins/platforms/libqwayland-generic.so: (libQt5WaylandClient.so.5: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/opt/qt5.9.6/plugins/platforms/libqwayland-generic.so" : "Cannot load library /opt/qt5.9.6/plugins/platforms/libqwayland-generic.so: (libQt5WaylandClient.so.5: cannot open shared object file: No such file or directory)"

Looks like libQt5WaylandClient.so.5 is missing.

Wade

Hi , jsulm

  Thanks , I've solved this problem by local compile.

Thanks
Wade Xu