Why Does My Qt5 Static Build Fail to Load the \'windows\' Platform Plugin?

Qt5 Static Build Fails to Load Platform Plugin "windows"

When building a Qt 5.0.2 application using a custom static distribution in Visual Studio 2012, developers often encounter the "Failed to load platform plugin windows" error. To resolve this issue, the following steps are commonly recommended.

First, ensure that the linker input includes the necessary libraries:

• imm32.lib
• winmm.lib
• Ws2_32.lib
• qtmaind.lib
• Qt5Cored.lib
• Qt5Guid.lib
• Qt5Widgetsd.lib

However, adding "qwindowsd.lib" to this list may not resolve the problem.

Dynamic Link Library Build (Note: For dynamic builds only)

If the application is built dynamically, it's essential to move the qwindows.dll to the same directory as the executable. The following structure should be maintained:

• yourapp.exe
• Qt5Core.dll
• ...
• platforms/qwindows.dll
• ...

Additionally, the plugins directory should be omitted. All necessary folders from QT_BASE/.../plugins/* should be placed directly with the binaries.

Reference

This information is derived from a discussion forum thread: http://qt-project.org/forums/viewthread/27056/#122588

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