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- CXX_STANDARD_REQUIRED
- ---------------------
- Boolean describing whether the value of :prop_tgt:`CXX_STANDARD` is a requirement.
- If this property is set to ``ON``, then the value of the
- :prop_tgt:`CXX_STANDARD` target property is treated as a requirement. If this
- property is ``OFF`` or unset, the :prop_tgt:`CXX_STANDARD` target property is
- treated as optional and may "decay" to a previous standard if the requested is
- not available. For compilers that have no notion of a standard level, such as
- MSVC, this has no effect.
- See the :manual:`cmake-compile-features(7)` manual for information on
- compile features and a list of supported compilers.
- This property is initialized by the value of
- the :variable:`CMAKE_CXX_STANDARD_REQUIRED` variable if it is set when a
- target is created.
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