HEADER_SET ---------- .. versionadded:: 3.23 Semicolon-separated list of files in the target's default header set, (i.e. the file set with name and type ``HEADERS``). If any of the paths are relative, they are computed relative to the target's source directory. 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_SET_` for the list of files in other header sets.