enable_language(CXX) set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1) set(CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE "") add_library(module-header sources/cxx-anchor.cxx) target_sources(module-header PRIVATE FILE_SET fs TYPE CXX_MODULE_HEADER_UNITS FILES sources/module-header.h) target_compile_features(module-header PRIVATE cxx_std_20)