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Diffstat (limited to 'Help/prop_tgt/OBJC_STANDARD.rst')
| -rw-r--r-- | Help/prop_tgt/OBJC_STANDARD.rst | 35 |
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diff --git a/Help/prop_tgt/OBJC_STANDARD.rst b/Help/prop_tgt/OBJC_STANDARD.rst new file mode 100644 index 0000000..d1e1b24 --- /dev/null +++ b/Help/prop_tgt/OBJC_STANDARD.rst @@ -0,0 +1,35 @@ +OBJC_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=gnu11`` to the compile line. + +Supported values are ``90``, ``99`` and ``11``. + +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 OBJC_STANDARD 11) + +with a compiler which does not support ``-std=gnu11`` or an equivalent +flag will not result in an error or warning, but will instead add the +``-std=gnu99`` or ``-std=gnu90`` flag if supported. This "decay" behavior may +be controlled with the :prop_tgt:`OBJC_STANDARD_REQUIRED` target property. +Additionally, the :prop_tgt:`OBJC_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:`C_STANDARD`, +the value of :prop_tgt:`C_STANDARD` is set for :prop_tgt:`OBJC_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_OBJC_STANDARD` variable if it is set when a target +is created. |