HEADER_DIRS ----------- .. versionadded:: 3.23 Semicolon-separated list of base directories of the target's default header set (i.e. the file set with name and type ``HEADERS``). 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:`HEADER_DIRS_` for the list of base directories in other header sets.