(Qt 5.4.1) 此应用程序无法启动，因为它无法找到或

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 是从源代码构建的，带有-opensource -nomake-test -nomake-example"配置选项.

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构建它时，一切正常.

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

但是当我运行这个项目时它显示:

But when I run this project it shows:

此应用程序无法启动，因为它无法找到或加载 Qt 平台插件xcb".

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

可用的平台插件有:linuxfb、minimal、offscreen、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.中止(核心转储)

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

所以我用谷歌搜索了这个问题并尝试了一切.我安装了所有软件包(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!

请有人帮助我...

我试过你的方法.

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:

你可以看到什么都没有丢失.实际上我已经在名为 libqxcb.so 的平台目录中创建了一个软链接.之前我的平台目录下没有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.

当我对我的可执行文件运行 ldd 命令时.表明:

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

当我执行这个文件时你可以看到错误.

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

推荐答案

对于类似的问题，在我的情况下，我解决了:

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

export QT_PLUGIN_PATH=<qt base path>/plugins

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