e0890d03a4
Add properties and variables corresponding to CXX equivalents. Add features for c_function_prototypes (C90), c_restrict (C99), c_variadic_macros (C99) and c_static_assert (C11). This feature set can be extended later. Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader to conditionally represent the c_restrict feature.
28 lines
977 B
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28 lines
977 B
ReStructuredText
C_STANDARD
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----------
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The C standard whose features are requested to build this target.
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This property specifies the C standard whose features are requested
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to build this target. For some compilers, this results in adding a
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flag such as ``-std=c11`` to the compile line.
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Supported values are ``90``, ``99`` and ``11``.
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If the value requested does not result in a compile flag being added for
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the compiler in use, a previous standard flag will be added instead. This
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means that using:
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.. code-block:: cmake
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set_property(TARGET tgt PROPERTY C_STANDARD 11)
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with a compiler which does not support ``-std=c11`` or an equivalent
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flag will not result in an error or warning, but will instead add the
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``-std=c99`` or ``-std=c90`` flag if supported. This "decay" behavior may
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be controlled with the :prop_tgt:`C_STANDARD_REQUIRED` target property.
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This property is initialized by the value of
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the :variable:`CMAKE_C_STANDARD` variable if it is set when a target
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is created.
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