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Diffstat (limited to 'Help/prop_tgt/OBJCXX_STANDARD.rst')
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diff --git a/Help/prop_tgt/OBJCXX_STANDARD.rst b/Help/prop_tgt/OBJCXX_STANDARD.rst new file mode 100644 index 000000000..3c925dcba --- /dev/null +++ b/Help/prop_tgt/OBJCXX_STANDARD.rst @@ -0,0 +1,35 @@ +OBJCXX_STANDARD +--------------- + +The ObjC++ standard whose features are requested to build this target. + +This property specifies the ObjC++ standard whose features are requested +to build this target. For some compilers, this results in adding a +flag such as ``-std=gnu++11`` to the compile line. + +Supported values are ``98``, ``11``, ``14``, ``17``, and ``20``. + +If the value requested does not result in a compile flag being added for +the compiler in use, a previous standard flag will be added instead. This +means that using: + +.. code-block:: cmake + + set_property(TARGET tgt PROPERTY OBJCXX_STANDARD 11) + +with a compiler which does not support ``-std=gnu++11`` or an equivalent +flag will not result in an error or warning, but will instead add the +``-std=gnu++98`` flag if supported. This "decay" behavior may be controlled +with the :prop_tgt:`OBJCXX_STANDARD_REQUIRED` target property. +Additionally, the :prop_tgt:`OBJCXX_EXTENSIONS` target property may be used to +control whether compiler-specific extensions are enabled on a per-target basis. + +If the property is not set, and the project has set the :prop_tgt:`CXX_STANDARD`, +the value of :prop_tgt:`CXX_STANDARD` is set for :prop_tgt:`OBJCXX_STANDARD`. + +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_OBJCXX_STANDARD` variable if it is set when a target +is created. |