QT6 Build from Source Documentation

[BrunoGSA]

Is there any good documentation about QT6 build from source where to show examples the ./configure script parameters.
The manual of ./configure script is not so clear.
I would like to know how to use "-submodules" parameter and the "-skip" repo and how to set "-widget" parameter to false.
In the manual it just shows how to enable with "-widget" (and the default is enabled)

When I set the parameter "- submodules qtbase,qtdeclarative" the CMake output is:
Manually-specified variables were not used by the project:
QT_BUILD_SUBMODULES