OBJCXX_STANDARDΒΆ
New in version 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
- New in version 3.20. - Objective C++23 
- 26
- New in version 3.25. - Objective C++26. CMake 3.25 and later recognize - 26as a valid value, no version has support for any compiler.
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:
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 OBJCXX_STANDARD_REQUIRED target property.
Additionally, the 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 CXX_STANDARD,
the value of CXX_STANDARD is set for OBJCXX_STANDARD.
See the 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 CMAKE_OBJCXX_STANDARD variable if it is set when a target
is created.
