快捷導(dǎo)航

QT應(yīng)用啟動(dòng)失敗排查方法小結(jié)

更新時(shí)間：2023年09月12日 15:18:29 作者：samxfb

啟動(dòng)QT應(yīng)用經(jīng)常會(huì)碰到應(yīng)用啟動(dòng)失敗,qt platform plugin無法啟動(dòng),本文就來介紹一下QT應(yīng)用啟動(dòng)失敗排查方法小結(jié),具有一定的參考價(jià)值,感興趣的可以了解以下

背景

啟動(dòng)QT應(yīng)用經(jīng)常會(huì)碰到應(yīng)用啟動(dòng)失敗，qt platform plugin無法啟動(dòng)，比如：

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" 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: xcb.

Aborted (core dumped)

排查辦法

打開QT Plugin加載調(diào)試開關(guān)

export QT_DEBUG_PLUGINS=1

重新啟動(dòng)應(yīng)用，會(huì)得到更詳細(xì)的錯(cuò)誤信息，如下

QFactoryLoader::QFactoryLoader() checking directory path "/home/netease/working/hermes/pc_mac/build/bin/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so"
Found metadata in lib /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331520
}
Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/netease/working/hermes/pc_mac/build/bin/platforms" ...
Cannot load library /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so: (libxcb-xinput.so.0: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so" : "Cannot load library /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so: (libxcb-xinput.so.0: cannot open shared object file: No such file or directory)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" 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: xcb.
Aborted (core dumped)

可以看出根本原因是Cannot load library /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so: (libxcb-xinput.so.0: cannot open shared object file: No such file or directory)加載不了libqxcb.so, 依賴的動(dòng)態(tài)庫libxcb-xinput.so.0找不到, ldd查看如下：

[netease@netease-Precision-3630-Tower ~/working/hermes/pc_mac/build/bin]$ ldd /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/libqxcb.so
        linux-vdso.so.1 (0x00007ffc3330b000)
        libQt5XcbQpa.so.5 => /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/../../lib/libQt5XcbQpa.so.5 (0x00007fc35406c000)
        libQt5Gui.so.5 => /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/../../lib/libQt5Gui.so.5 (0x00007fc353800000)
        libQt5Core.so.5 => /home/netease/working/hermes/pc_mac/build/bin/plugins/platforms/../../lib/libQt5Core.so.5 (0x00007fc352b8f000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fc352806000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc352415000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fc3521f6000)
        libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007fc351ff4000)
        libxcb-icccm.so.4 => /usr/lib/x86_64-linux-gnu/libxcb-icccm.so.4 (0x00007fc351def000)
        libxcb-image.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-image.so.0 (0x00007fc351bea000)
        libxcb-shm.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-shm.so.0 (0x00007fc3519e7000)
        libxcb-keysyms.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-keysyms.so.1 (0x00007fc3517e4000)
        libxcb-randr.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-randr.so.0 (0x00007fc3515d4000)
        libxcb-render-util.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-render-util.so.0 (0x00007fc3513d0000)
        libxcb-render.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-render.so.0 (0x00007fc3511c3000)
        libxcb-shape.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-shape.so.0 (0x00007fc350fbf000)
        libxcb-sync.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007fc350db8000)
        libxcb-xfixes.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-xfixes.so.0 (0x00007fc350bb0000)
        libxcb-xinerama.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-xinerama.so.0 (0x00007fc3509ad000)
        libxcb-xinput.so.0 => not found
        libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007fc350675000)
        libSM.so.6 => /usr/lib/x86_64-linux-gnu/libSM.so.6 (0x00007fc35046d000)
        libICE.so.6 => /usr/lib/x86_64-linux-gnu/libICE.so.6 (0x00007fc350252000)
        libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fc35002a000)
        libxcb-xkb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-xkb.so.1 (0x00007fc34fe0e000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fc34fa70000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fc34f858000)
        libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007fc34f5cc000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fc34f3c8000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fc35477b000)
        libxcb-util.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-util.so.1 (0x00007fc34f1c2000)
        libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007fc34efbb000)
        libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007fc34eda6000)
        libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007fc34eba2000)
        libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fc34e99c000)
        libGLX.so.0 => /usr/lib/x86_64-linux-gnu/libGLX.so.0 (0x00007fc34e76b000)
        libGLdispatch.so.0 => /usr/lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007fc34e4b5000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fc34e2ad000)

確實(shí)是 libxcb-xinput.so.0 => not found