# <LANG>_STANDARD_REQUIRED

The variations are:

- `C_STANDARD_REQUIRED`

- `CXX_STANDARD_REQUIRED`

- `CUDA_STANDARD_REQUIRED`

- `HIP_STANDARD_REQUIRED`

- `OBJC_STANDARD_REQUIRED`

- `OBJCXX_STANDARD_REQUIRED`

These properties specify whether the value of `<LANG>_STANDARD` is a requirement. When `OFF` or unset, the `<LANG>_STANDARD` target property is treated as optional and may "decay" to a previous standard if the requested is not available.

These properties are initialized by the value of the `CMAKE_<LANG>_STANDARD_REQUIRED` variable if it is set when a target is created.

For supported CMake versions see the respective pages. To control language standard versions see `<LANG>_STANDARD`.

See the `cmake-compile-features(7)` manual for information on compile features and a list of supported compilers.