CXX_MODULE_DIRS_ ---------------------- .. versionadded:: 3.28 Semicolon-separated list of base directories of the target's ```` C++ module set, which has the set type ``CXX_MODULES``. The property supports :manual:`generator expressions `. This property is normally only set by :command:`target_sources(FILE_SET)` rather than being manipulated directly. See :prop_tgt:`CXX_MODULE_DIRS` for the list of base directories in the default C++ module set. See :prop_tgt:`CXX_MODULE_SETS` for the file set names of all C++ module sets.