| OBJCXX_STANDARD |
| --------------- |
| |
| .. versionadded:: 3.16 |
| |
| 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`` |
| Objective C++98 |
| |
| ``11`` |
| Objective C++11 |
| |
| ``14`` |
| Objective C++14 |
| |
| ``17`` |
| Objective C++17 |
| |
| ``20`` |
| Objective C++20 |
| |
| ``23`` |
| .. versionadded:: 3.20 |
| |
| Objective C++23 |
| |
| 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. |