CMake/Help/variable/CMAKE_CXX_SCAN_FOR_MODULES.rst

CMAKE_CXX_SCAN_FOR_MODULES
--------------------------

.. versionadded:: 3.28

Whether to scan C++ source files for module dependencies.

This variable is used to initialize the :prop_tgt:`CXX_SCAN_FOR_MODULES`
property on all the targets.  See that target property for additional
information.