cmake for MSVC on C++20 modules build

CMakeLists.txt

cmake_minimum_required(VERSION 3.16)

project(Cpp20)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(PREBUILT_MODULE_DIR ${CMAKE_BINARY_DIR}/modules)
set(STD_MODULES_DIR "D:/MSVC/VC/Tools/MSVC/14.29.30133/ifc/x64") # macro "$(VC_IFCPath)" in MSVC

# https://devblogs.microsoft.com/cppblog/using-cpp-modules-in-msvc-from-the-command-line-part-1/

function(add_module name)
    file(MAKE_DIRECTORY ${PREBUILT_MODULE_DIR})
    add_custom_target(${name}.ifc
            COMMAND
                ${CMAKE_CXX_COMPILER}
                /std:c++latest
                /stdIfcDir ${STD_MODULES_DIR}
                /experimental:module
                /c
                /EHsc
                /MD
                ${CMAKE_CURRENT_SOURCE_DIR}/${ARGN}
                /module:export
                /ifcOutput
                ${PREBUILT_MODULE_DIR}/${name}.ifc
                /Fo${PREBUILT_MODULE_DIR}/${name}.obj
            )
endfunction()

set(CUSTOM_MODULES_DIR ${CMAKE_CURRENT_SOURCE_DIR}/modules)
add_module(my_module ${CUSTOM_MODULES_DIR}/my_module.ixx)

add_executable(test
    test.cpp
    )
target_compile_options(test
    BEFORE
    PRIVATE
    /std:c++latest
    /experimental:module
    /stdIfcDir ${STD_MODULES_DIR}
    /ifcSearchDir ${PREBUILT_MODULE_DIR}
    /reference my_module=${PREBUILT_MODULE_DIR}/my_module.ifc
    /EHsc
    /MD
)
target_link_libraries(test ${PREBUILT_MODULE_DIR}/my_module.obj)
add_dependencies(test my_module.ifc)