Is building Qt on a 64bit AMD platform with Windows supported?

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Answer:

 

You can build the source package on 64bit AMD platforms provided you use the 64 bit command line shell that comes with Visual Studio. The Qt binary package is prebuilt in 32 bit, so it is necessary to use the source package. Note that the mkspec for Visual Studio .NET 2005 uses win32, but this is only because Visual Studio .NET 2005 works on 32bit platforms as well. The following suggestion is listed in the Task Tracker for adding a separate configuration for Win64:

http://trolltech.com/developer/task-tracker/index_html?method=entry&id=149345