CMake/Help/release/dev/compile-language-features.rst

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target-language-features
------------------------
* New :prop_tgt:`CXX_STANDARD` and :prop_tgt:`CXX_EXTENSIONS` target
properties may specify values which CMake uses to compute required
compile options such as ``-std=c++11`` or ``-std=gnu++11``. The
:variable:`CMAKE_CXX_STANDARD` and :variable:`CMAKE_CXX_EXTENSIONS`
variables may be set to initialize the target properties.
* New :prop_tgt:`C_STANDARD` and :prop_tgt:`C_EXTENSIONS` target
properties may specify values which CMake uses to compute required
compile options such as ``-std=c11`` or ``-std=gnu11``. The
:variable:`CMAKE_C_STANDARD` and :variable:`CMAKE_C_EXTENSIONS`
variables may be set to initialize the target properties.
* New :prop_tgt:`COMPILE_FEATURES` target property may contain a list
of features required to compile a target. CMake uses this
information to ensure that the compiler in use is capable of building
the target, and to add any necessary compile flags to support language
features.
* New :command:`target_compile_features` command allows populating the
:prop_tgt:`COMPILE_FEATURES` target property, just like any other
build variable.
* New ``COMPILE_FEATURES``
:manual:`generator expression <cmake-generator-expressions(7)>` allows
setting build properties based on available compiler features.