| Experimental. Gated by ``CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API`` |
| Semicolon-separated list of files in the target's default C++ module set, |
| (i.e. the file set with name and type ``CXX_MODULES``). If any of the paths |
| are relative, they are computed relative to the target's source directory. The |
| :manual:`generator expressions <cmake-generator-expressions(7)>`. |
| This property is normally only set by :command:`target_sources(FILE_SET)` |
| rather than being manipulated directly. |
| See :prop_tgt:`CXX_MODULE_SET_<NAME>` for the list of files in other C++ |