(Qt 5.4.1)该应用程序无法启动，因为它无法找到或加载Qt平台插件"xcb". [英] (Qt 5.4.1) This application failed to start because it could not find or load the Qt platform plugin "xcb"

问题描述

我重新安装了ubuntu 14.04，Qt 5.4.1和Qtcreator.

I reinstalled my ubuntu 14.04 and Qt 5.4.1 and Qtcreator.

Qt 5.4.1是使用"-opensource -nomake-test -nomake-example"配置选项从源代码构建的.

Qt 5.4.1 was built from source with "-opensource -nomake-test -nomake-example" configure options.

当我在QtCreator中打开一个旧项目并进行构建时，一切正常.

When I open an old project in QtCreator and build it everything's OK.

但是当我运行该项目时，它显示:

But when I run this project it shows:

此应用程序无法启动，因为无法找到或加载Qt平台插件"xcb".

This application failed to start because it could not find or load the Qt platform plugin "xcb".

可用的平台插件包括:linuxfb，最小，离屏，xcb.

Available platform plugins are: linuxfb, minimal, offscreen, xcb.

重新安装应用程序可能会解决此问题.已中止(核心已弃用)

Reinstalling the application may fix this problem. Aborted (core dumped)

因此我用谷歌搜索了这个问题并尝试了所有方法.我安装了每个软件包(libxcb系列)，但没有任何帮助！

So I googled this problem and tried everything. I installed every packages (libxcb series) but nothing can help!

请有人帮我...

我尝试了您的方法.

当我在 platform 目录中运行 ldd 命令时，它显示:

When I run ldd command in platform directory, It shows:

您可以看到没有任何丢失.实际上，我已经在名为libqxcb.so的平台目录中建立了软链接.以前，我的平台目录中没有libqxcb.so.

You can see that nothing is missing. And actually I have made a softlink in the platform directory called libqxcb.so. There was no libqxcb.so in my platform directory before.

当我对可执行文件运行 ldd 命令时.表明:

And when I run ldd command to my executable. it shows:

当我执行此文件时，您会看到错误.

And you can see the error when I execute this file.

推荐答案

对于类似的问题，我的解决方法是:

For a similar issue, in my case I solved with:

export QT_PLUGIN_PATH=<qt base path>/plugins

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