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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 C standard level, such as all versions of
+MSVC known as of this version of CMake, 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.