# CXX_MODULE_HEADER_UNIT_SET

New in version 3.25.

Note

Experimental. Gated by `CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API`

Semicolon-separated list of files in the target's default C++ module header set, (i.e. the file set with name and type `CXX_MODULE_HEADER_UNITS`). If any of the paths are relative, they are computed relative to the target's source directory. The property supports `generator expressions`.

This property is normally only set by `target_sources(FILE_SET)` rather than being manipulated directly.

See `CXX_MODULE_HEADER_UNIT_SET_<NAME>` for the list of files in other C++ module header sets.