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- C_STANDARD
- ----------
- The C standard whose features are requested to build this target.
- This property specifies the C standard whose features are requested
- to build this target. For some compilers, this results in adding a
- flag such as ``-std=gnu11`` to the compile line. For compilers that
- have no notion of a standard level, such as Microsoft Visual C++ before
- 2015 Update 3, this has no effect.
- Supported values are ``90``, ``99`` and ``11``.
- 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 C_STANDARD 11)
- with a compiler which does not support ``-std=gnu11`` or an equivalent
- flag will not result in an error or warning, but will instead add the
- ``-std=gnu99`` or ``-std=gnu90`` flag if supported. This "decay" behavior may
- be controlled with the :prop_tgt:`C_STANDARD_REQUIRED` target property.
- Additionally, the :prop_tgt:`C_EXTENSIONS` target property may be used to
- control whether compiler-specific extensions are enabled on a per-target basis.
- 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_C_STANDARD` variable if it is set when a target
- is created.
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