<LANG>_STANDARD --------------- The variations are: * :prop_tgt:`C_STANDARD` * :prop_tgt:`CXX_STANDARD` * :prop_tgt:`CUDA_STANDARD` * :prop_tgt:`HIP_STANDARD` * :prop_tgt:`OBJC_STANDARD` * :prop_tgt:`OBJCXX_STANDARD` These properties specify language standard versions which are requested. When a newer standard is specified than is supported by the compiler, then it will fallback to the latest supported standard. This "decay" behavior may be controlled with the :prop_tgt:`<LANG>_STANDARD_REQUIRED` target property. Note that the actual language standard used may be higher than that specified by ``<LANG>_STANDARD``, regardless of the value of :prop_tgt:`<LANG>_STANDARD_REQUIRED`. In particular, :ref:`transitive usage requirements <Target Usage Requirements>` or the use of :manual:`compile features <cmake-compile-features(7)>` can raise the required language standard above what ``<LANG>_STANDARD`` specifies. These properties are initialized by the value of the :variable:`CMAKE_<LANG>_STANDARD` variable if it is set when a target is created. For supported values and CMake versions see the respective pages. To control compiler-specific extensions see :prop_tgt:`<LANG>_EXTENSIONS`. See the :manual:`cmake-compile-features(7)` manual for information on compile features and a list of supported compilers.
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