MESSAGE(WARNING "The WinCC_OA API could not be found (WINCC_ROOT_DIR=${WINCC_ROOT_DIR}). Hence, the WinCCWrapper library cannot be build. We do continue with cmake-configure and build however, because for development one could use a mocked WinCCWrapper as well.")
# add the mock.py module with the mocked WinCCWrapper,
# so it is available for development even on systems without the WinCC_OA API
MESSAGE("adding mocked python WinCCWrapper for development")