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CMake/Help/prop_tgt/CXX_STANDARD_REQUIRED.rst

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cmTarget: Add CXX_STANDARD_REQUIRED to control decay.
2014-04-30 20:07:38 +04:00
CXX_STANDARD_REQUIRED
---------------------
Boolean describing whether the value of :prop_tgt:`CXX_STANDARD` is a requirement.
If this property is set to ``ON``, then the value of the
:prop_tgt:`CXX_STANDARD` target property is treated as a requirement. If this
property is ``OFF`` or unset, the :prop_tgt:`CXX_STANDARD` target property is
treated as optional and may "decay" to a previous standard if the requested is
Features: Define meaning for no language standard default Define an empty string in CMAKE_<LANG>_STANDARD_DEFAULT to mean that the toolchain has no notion of lanuage standard levels. In this case the <LANG>_STANDARD[_REQUIRED] properties will have no effect. Update the RunCMake.CompileFeatures test to exclude the LinkImplementationFeatureCycle test when there is no standard default. It can never fail because no use of specific features will adjust the CXX_STANDARD level required for any target since the standard levels have no meaning in this case.
2015-01-27 00:42:36 +03:00
not available. For compilers that have no notion of a standard level, such as
MSVC, this has no effect.
cmTarget: Add CXX_STANDARD_REQUIRED to control decay.
2014-04-30 20:07:38 +04:00
Help: Add a manual for compiler feature control. Link to it from the documentation of related properties, variables and commands. Extend the cmake-developer(7) documentation with notes on extending feature support for compilers.
2014-03-19 02:50:18 +04:00
See the :manual:`cmake-compile-features(7)` manual for information on
compile features.
cmTarget: Add CXX_STANDARD_REQUIRED to control decay.
2014-04-30 20:07:38 +04:00
This property is initialized by the value of
the :variable:`CMAKE_CXX_STANDARD_REQUIRED` variable if it is set when a
target is created.