OBJCXX_STANDARD

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 26 as 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.