qt安装--this Qt version uses an unsupported makefile

解决办法：

  1. Run regedit.
  2. Hop to HKEY_CURRENT_USERSoftwareTrolltechVersions或HKEY_CURRENT_USERSoftwareDigiaVersions
  3. Add a new key named "bin文件夹的上一级目录" or whatever version you have.
  4. Under the new key， create a new string "InstallDir" valued with "C:Qt4.3-msvc2005--bin文件夹的目录":
  5. Run Visual Studio
  6. Click Qt -> Qt Options.
  7. The new version should be there.
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原文地址：https://www.cnblogs.com/defen/p/4416067.html