AUTOGEN_SOURCE_GROUP
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Cmake/docs/3.21/prop gbl/autogen source group
AUTOGEN_SOURCE_GROUP
New in version 3.9.
Name of the source_group() for AUTOMOC, AUTORCC and AUTOUIC generated files.
Files generated by AUTOMOC, AUTORCC and AUTOUIC are not always known at configure time and therefore can't be passed to source_group(). AUTOGEN_SOURCE_GROUP can be used instead to generate or select a source group for AUTOMOC, AUTORCC and AUTOUIC generated files.
For AUTOMOC, AUTORCC and AUTOUIC specific overrides see AUTOMOC_SOURCE_GROUP, AUTORCC_SOURCE_GROUP and AUTOUIC_SOURCE_GROUP respectively.
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https://cmake.org/cmake/help/v3.21/prop_gbl/AUTOGEN_SOURCE_GROUP.html