CMAKE_<LANG>_FLAGS_<CONFIG>_INIT -------------------------------- .. versionadded:: 3.11 Value used to initialize the :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>` cache entry the first time a build tree is configured for language ``<LANG>``. This variable is meant to be set by a :variable:`toolchain file <CMAKE_TOOLCHAIN_FILE>`. CMake may prepend or append content to the value based on the environment and target platform. See also :variable:`CMAKE_<LANG>_FLAGS_INIT`.