Qt 找不到XCB插件

我使用本教程交叉编译并将Qt 5.11.1部署到Raspberry PI 3：

到目前为止，一切正常，直到我在第15点被卡住：

[在RPi上]运行我们以前构建的示例。在这一点上，它应该 只需以60帧/秒的速度全屏工作，使用鼠标、键盘，甚至可能 触摸支持

我的问题如下：

pi@raspberrypi:~ $ ./qopenglwidget 
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Reinstalling the application may fix this problem.
Przerwane

pi@raspberrypi:~ $ ldd qopenglwidget 
    linux-vdso.so.1 (0x7ec7f000)
    /usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76f58000)
    libQt5Widgets.so.5 => /usr/lib/arm-linux-gnueabihf/libQt5Widgets.so.5 (0x769f2000)
    libQt5Gui.so.5 => /usr/lib/arm-linux-gnueabihf/libQt5Gui.so.5 (0x765cc000)
    libQt5Core.so.5 => /usr/local/qt5pi/lib/libQt5Core.so.5 (0x7608e000)
    libbrcmGLESv2.so => /opt/vc/lib/libbrcmGLESv2.so (0x76069000)
    libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0x76040000)
    libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x75ef8000)
    libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x75e79000)
    libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x75e4c000)
    libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x75d0d000)
    /lib/ld-linux-armhf.so.3 (0x76f6e000)
    libharfbuzz.so.0 => /usr/lib/arm-linux-gnueabihf/libharfbuzz.so.0 (0x75c76000)
    libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0x75c4f000)
    libpng16.so.16 => /usr/lib/arm-linux-gnueabihf/libpng16.so.16 (0x75c15000)
    libdouble-conversion.so.1 => /usr/lib/arm-linux-gnueabihf/libdouble-conversion.so.1 (0x75bf3000)
    libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x75be0000)
    libbrcmEGL.so => /opt/vc/lib/libbrcmEGL.so (0x75ba7000)
    libbcm_host.so => /opt/vc/lib/libbcm_host.so (0x75b80000)
    libvchiq_arm.so => /opt/vc/lib/libvchiq_arm.so (0x75b6a000)
    libvcos.so => /opt/vc/lib/libvcos.so (0x75b50000)
    librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0x75b39000)
    libglib-2.0.so.0 => /lib/arm-linux-gnueabihf/libglib-2.0.so.0 (0x75a31000)
    libfreetype.so.6 => /usr/lib/arm-linux-gnueabihf/libfreetype.so.6 (0x75996000)
    libgraphite2.so.3 => /usr/lib/arm-linux-gnueabihf/libgraphite2.so.3 (0x75963000)
    libpcre.so.3 => /lib/arm-linux-gnueabihf/libpcre.so.3 (0x758ea000)

似乎Rpi没有正确的XCB目录。另一方面，它列出了可用的插件，所以路径应该是好的

ldd返回以下内容：

pi@raspberrypi:~ $ ./qopenglwidget 
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Reinstalling the application may fix this problem.
Przerwane

pi@raspberrypi:~ $ ldd qopenglwidget 
    linux-vdso.so.1 (0x7ec7f000)
    /usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76f58000)
    libQt5Widgets.so.5 => /usr/lib/arm-linux-gnueabihf/libQt5Widgets.so.5 (0x769f2000)
    libQt5Gui.so.5 => /usr/lib/arm-linux-gnueabihf/libQt5Gui.so.5 (0x765cc000)
    libQt5Core.so.5 => /usr/local/qt5pi/lib/libQt5Core.so.5 (0x7608e000)
    libbrcmGLESv2.so => /opt/vc/lib/libbrcmGLESv2.so (0x76069000)
    libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0x76040000)
    libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x75ef8000)
    libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x75e79000)
    libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x75e4c000)
    libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x75d0d000)
    /lib/ld-linux-armhf.so.3 (0x76f6e000)
    libharfbuzz.so.0 => /usr/lib/arm-linux-gnueabihf/libharfbuzz.so.0 (0x75c76000)
    libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0x75c4f000)
    libpng16.so.16 => /usr/lib/arm-linux-gnueabihf/libpng16.so.16 (0x75c15000)
    libdouble-conversion.so.1 => /usr/lib/arm-linux-gnueabihf/libdouble-conversion.so.1 (0x75bf3000)
    libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x75be0000)
    libbrcmEGL.so => /opt/vc/lib/libbrcmEGL.so (0x75ba7000)
    libbcm_host.so => /opt/vc/lib/libbcm_host.so (0x75b80000)
    libvchiq_arm.so => /opt/vc/lib/libvchiq_arm.so (0x75b6a000)
    libvcos.so => /opt/vc/lib/libvcos.so (0x75b50000)
    librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0x75b39000)
    libglib-2.0.so.0 => /lib/arm-linux-gnueabihf/libglib-2.0.so.0 (0x75a31000)
    libfreetype.so.6 => /usr/lib/arm-linux-gnueabihf/libfreetype.so.6 (0x75996000)
    libgraphite2.so.3 => /usr/lib/arm-linux-gnueabihf/libgraphite2.so.3 (0x75963000)
    libpcre.so.3 => /lib/arm-linux-gnueabihf/libpcre.so.3 (0x758ea000)

---

我觉得还可以。我也尝试过，但没有成功：

您是为eglfs编译的，而不是为xcb编译的，因此您必须使用以下命令启动应用程序：

/qopenglwidget-platform eglfs

，我认为两者都应该可以工作。当使用eglfs参数运行时，情况是一样的，它只是说找不到eglfs而不是xbc。这表示您没有正确安装。：）在哪一点上？我已经在Rpi中安装了Qt 5.10.1，部分遵循了该手册，我没有任何问题。