我使用安装工具“ qt-unified-linux-x64-3.0.5-online.run”将包括Qtcreator在内的Qt5.7安装到了/ usr / local / Qt文件夹中
当我以详细模式运行qtcreator时（导出QT_DEBUG_PLUGINS = 1），我得到以下输出：
Cannot load library /usr/local/Qt/5.7/gcc_64/plugins/platforms/libqxcb.so: (/usr/local/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5: symbol _ZTI18QPlatformClipboard, version Qt_5 not defined in file libQt5Gui.so.5 with link time reference)
QLibraryPrivate::loadPlugin failed on "/usr/local/Qt/5.7/gcc_64/plugins/platforms/libqxcb.so" : "Cannot load library /usr/local/Qt/5.7/gcc_64/plugins/platforms/libqxcb.so: (/usr/local/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5: symbol _ZTI18QPlatformClipboard, version Qt_5 not defined in file libQt5Gui.so.5 with link time reference)"
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: eglfs, linuxfb, minimal, minimalegl, offscreen, xcb, vnc.
运行ldd /usr/local/Qt/5.7/gcc_64/plugins/platforms/libqxcb.so返回
linux-vdso.so.1 => (0x00007ffdda390000)
libQt5XcbQpa.so.5 => /usr/local/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5 (0x00007f9e44a33000)
libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f9e44831000)
libXi.so.6 => /usr/lib/x86_64-linux-gnu/libXi.so.6 (0x00007f9e44621000)
libSM.so.6 => /usr/lib/x86_64-linux-gnu/libSM.so.6 (0x00007f9e44419000)
libICE.so.6 => /usr/lib/x86_64-linux-gnu/libICE.so.6 (0x00007f9e441ff000)
libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f9e43fb3000)
libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f9e43d91000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f9e43b8d000)
libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f9e4398b000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f9e43783000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f9e43472000)
libXrender.so.1 => /usr/lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f9e43268000)
libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f9e43056000)
libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f9e42d1c000)
libfontconfig.so.1 => /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007f9e42ad9000)
libfreetype.so.6 => /usr/lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f9e4282f000)
libEGL.so.1 => /usr/lib/nvidia-384/libEGL.so.1 (0x00007f9e4262a000)
libQt5Gui.so.5 => /usr/local/Qt/5.7/gcc_64/lib/libQt5Gui.so.5 (0x00007f9e41e9e000)
libQt5DBus.so.5 => /usr/local/Qt/5.7/gcc_64/lib/libQt5DBus.so.5 (0x00007f9e41c1e000)
libQt5Core.so.5 => /usr/local/Qt/5.7/gcc_64/lib/libQt5Core.so.5 (0x00007f9e41500000)
libGL.so.1 => /usr/lib/nvidia-384/libGL.so.1 (0x00007f9e411be000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f9e40fa1000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f9e40c1f000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f9e40916000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f9e40700000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f9e40336000)
libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f9e40131000)
libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007f9e450fc000)
libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f9e3ff2d000)
libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f9e3fd27000)
/lib64/ld-linux-x86-64.so.2 (0x00007f9e44f84000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f9e3fab7000)
libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f9e3f88e000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f9e3f674000)
libpng12.so.0 => /usr/lib/x86_64-linux-gnu/libpng12.so.0 (0x00007f9e3f44f000)
libGLdispatch.so.0 => /usr/lib/nvidia-384/libGLdispatch.so.0 (0x00007f9e3f181000)
libicui18n.so.56 => /usr/local/Qt/5.7/gcc_64/lib/libicui18n.so.56 (0x00007f9e3ece7000)
libicuuc.so.56 => /usr/local/Qt/5.7/gcc_64/lib/libicuuc.so.56 (0x00007f9e3e92f000)
libicudata.so.56 => /usr/local/Qt/5.7/gcc_64/lib/libicudata.so.56 (0x00007f9e3cf4c000)
libnvidia-tls.so.384.130 => /usr/lib/nvidia-384/tls/libnvidia-tls.so.384.130 (0x00007f9e3cd48000)
libnvidia-glcore.so.384.130 => /usr/lib/nvidia-384/libnvidia-glcore.so.384.130 (0x00007f9e3ae8c000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f9e3ac6a000)
liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f9e3aa48000)
libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007f9e3a767000)
libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f9e3a553000)
我无法固定错误。相关线程例如是https://forum.qt.io/topic/71369/failed-to-load-qt-platform-plugin-xcb/2，但在我的情况下并不缺少libQt5XcbQpa.so.5.6.1。有什么想法吗？
答案 0 :(得分：0)
对我来说，解决方案是使用以下方法明确指向正确的共享库： LD_LIBRARY_PATH = / usr / lib / x86_64-linux-gnu / qtcreator
答案 1 :(得分：0)
我在 Ubuntu 16 上遇到了这个问题，错误 xcb。使用详细密钥，我意识到缺少软件包：libxcb-xinerama0。安装后，一切正常。