[Development] Why we need some CMake file of Build Or Install Qt?

[Loaden]

Hi, all! Just wonder, When build or install Qt, I can confirm there has
some CMake files generated, e.g.
D:\cmake\Qt5\Qt5Config.cmake
 D:\cmake\Qt5\Qt5ConfigVersion.cmake
D:\qpSOFT\Sources\Qt5\qtbase\mkspecs\cmake\Qt5BasicConfig.cmake.in
D:\qpSOFT\Sources\Qt5\qtbase\mkspecs\cmake\Qt5ConfigVersion.cmake.in
...
I know in currently, We don't use CMake for Qt Build, am I right?
So, Why we need keep these files in repos?
-- 
Regards
Loaden
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