qt安装--this Qt version uses an unsupported makefile

解决办法：

1. Run regedit.
2. Hop to HKEY_CURRENT_USER\Software\Trolltech\Versions
3. Add a new key named "4.3.2" or whatever version you have.
4. Under the new key， create a new string "InstallDir" valued with "C:\Qt\4.3-msvc2005":
5. Run Visual Studio
6. Click Qt -> Qt Options.
7. The new version should be there.

原文：http://www.cnblogs.com/defen/p/4416067.html