OBJCXX_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=gnu++11
to the compile line.
Supported values are 98
, 11
, 14
, 17
, and 20
.
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.