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36 lines
1.4 KiB
36 lines
1.4 KiB
5 years ago
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OBJC_STANDARD
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-------------
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The OBJC standard whose features are requested to build this target.
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This property specifies the OBJC standard whose features are requested
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to build this target. For some compilers, this results in adding a
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flag such as ``-std=gnu11`` to the compile line.
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Supported values are ``90``, ``99`` and ``11``.
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If the value requested does not result in a compile flag being added for
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the compiler in use, a previous standard flag will be added instead. This
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means that using:
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.. code-block:: cmake
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set_property(TARGET tgt PROPERTY OBJC_STANDARD 11)
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with a compiler which does not support ``-std=gnu11`` or an equivalent
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flag will not result in an error or warning, but will instead add the
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``-std=gnu99`` or ``-std=gnu90`` flag if supported. This "decay" behavior may
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be controlled with the :prop_tgt:`OBJC_STANDARD_REQUIRED` target property.
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Additionally, the :prop_tgt:`OBJC_EXTENSIONS` target property may be used to
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control whether compiler-specific extensions are enabled on a per-target basis.
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If the property is not set, and the project has set the :prop_tgt:`C_STANDARD`,
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the value of :prop_tgt:`C_STANDARD` is set for :prop_tgt:`OBJC_STANDARD`.
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See the :manual:`cmake-compile-features(7)` manual for information on
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compile features and a list of supported compilers.
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This property is initialized by the value of
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the :variable:`CMAKE_OBJC_STANDARD` variable if it is set when a target
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is created.
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