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363 lines
11 KiB
363 lines
11 KiB
CMAKE_CXX_KNOWN_FEATURES
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------------------------
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.. versionadded:: 3.1
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List of C++ features known to this version of CMake.
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The features listed in this global property may be known to be available to the
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C++ compiler. If the feature is available with the C++ compiler, it will
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be listed in the :variable:`CMAKE_CXX_COMPILE_FEATURES` variable.
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The features listed here may be used with the :command:`target_compile_features`
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command. See the :manual:`cmake-compile-features(7)` manual for information on
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compile features and a list of supported compilers.
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The features known to this version of CMake are listed below.
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High level meta features indicating C++ standard support
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. versionadded:: 3.8
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The following meta features indicate general support for the associated
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language standard. It reflects the language support claimed by the compiler,
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but it does not necessarily imply complete conformance to that standard.
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``cxx_std_98``
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Compiler mode is at least C++ 98.
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``cxx_std_11``
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Compiler mode is at least C++ 11.
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``cxx_std_14``
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Compiler mode is at least C++ 14.
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``cxx_std_17``
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Compiler mode is at least C++ 17.
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``cxx_std_20``
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.. versionadded:: 3.12
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Compiler mode is at least C++ 20.
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``cxx_std_23``
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.. versionadded:: 3.20
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Compiler mode is at least C++ 23.
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.. include:: CMAKE_LANG_STD_FLAGS.txt
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Low level individual compile features
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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For C++ 11 and C++ 14, compilers were sometimes slow to implement certain
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language features. CMake provided some individual compile features to help
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projects determine whether specific features were available. These individual
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features are now less relevant and projects should generally prefer to use the
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high level meta features instead. Individual compile features are not provided
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for C++ 17 or later.
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See the :manual:`cmake-compile-features(7)` manual for further discussion of
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the use of individual compile features.
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Individual features from C++ 98
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"""""""""""""""""""""""""""""""
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``cxx_template_template_parameters``
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Template template parameters, as defined in ``ISO/IEC 14882:1998``.
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Individual features from C++ 11
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"""""""""""""""""""""""""""""""
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``cxx_alias_templates``
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Template aliases, as defined in N2258_.
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.. _N2258: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2258.pdf
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``cxx_alignas``
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Alignment control ``alignas``, as defined in N2341_.
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.. _N2341: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2341.pdf
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``cxx_alignof``
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Alignment control ``alignof``, as defined in N2341_.
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.. _N2341: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2341.pdf
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``cxx_attributes``
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Generic attributes, as defined in N2761_.
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.. _N2761: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2761.pdf
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``cxx_auto_type``
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Automatic type deduction, as defined in N1984_.
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.. _N1984: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1984.pdf
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``cxx_constexpr``
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Constant expressions, as defined in N2235_.
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.. _N2235: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2235.pdf
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``cxx_decltype_incomplete_return_types``
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Decltype on incomplete return types, as defined in N3276_.
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.. _N3276 : http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3276.pdf
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``cxx_decltype``
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Decltype, as defined in N2343_.
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.. _N2343: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf
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``cxx_default_function_template_args``
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Default template arguments for function templates, as defined in DR226_
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.. _DR226: http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#226
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``cxx_defaulted_functions``
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Defaulted functions, as defined in N2346_.
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.. _N2346: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm
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``cxx_defaulted_move_initializers``
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Defaulted move initializers, as defined in N3053_.
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.. _N3053: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3053.html
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``cxx_delegating_constructors``
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Delegating constructors, as defined in N1986_.
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.. _N1986: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1986.pdf
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``cxx_deleted_functions``
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Deleted functions, as defined in N2346_.
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.. _N2346: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm
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``cxx_enum_forward_declarations``
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Enum forward declarations, as defined in N2764_.
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.. _N2764: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf
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``cxx_explicit_conversions``
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Explicit conversion operators, as defined in N2437_.
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.. _N2437: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2437.pdf
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``cxx_extended_friend_declarations``
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Extended friend declarations, as defined in N1791_.
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.. _N1791: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1791.pdf
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``cxx_extern_templates``
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Extern templates, as defined in N1987_.
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.. _N1987: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1987.htm
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``cxx_final``
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Override control ``final`` keyword, as defined in N2928_, N3206_ and N3272_.
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.. _N2928: http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm
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.. _N3206: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm
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.. _N3272: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm
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``cxx_func_identifier``
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Predefined ``__func__`` identifier, as defined in N2340_.
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.. _N2340: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2340.htm
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``cxx_generalized_initializers``
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Initializer lists, as defined in N2672_.
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.. _N2672: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2672.htm
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``cxx_inheriting_constructors``
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Inheriting constructors, as defined in N2540_.
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.. _N2540: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2540.htm
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``cxx_inline_namespaces``
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Inline namespaces, as defined in N2535_.
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.. _N2535: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2535.htm
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``cxx_lambdas``
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Lambda functions, as defined in N2927_.
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.. _N2927: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2927.pdf
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``cxx_local_type_template_args``
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Local and unnamed types as template arguments, as defined in N2657_.
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.. _N2657: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm
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``cxx_long_long_type``
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``long long`` type, as defined in N1811_.
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.. _N1811: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1811.pdf
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``cxx_noexcept``
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Exception specifications, as defined in N3050_.
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.. _N3050: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3050.html
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``cxx_nonstatic_member_init``
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Non-static data member initialization, as defined in N2756_.
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.. _N2756: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2756.htm
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``cxx_nullptr``
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Null pointer, as defined in N2431_.
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.. _N2431: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf
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``cxx_override``
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Override control ``override`` keyword, as defined in N2928_, N3206_
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and N3272_.
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.. _N2928: http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm
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.. _N3206: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm
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.. _N3272: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm
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``cxx_range_for``
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Range-based for, as defined in N2930_.
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.. _N2930: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2930.html
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``cxx_raw_string_literals``
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Raw string literals, as defined in N2442_.
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.. _N2442: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm
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``cxx_reference_qualified_functions``
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Reference qualified functions, as defined in N2439_.
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.. _N2439: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2439.htm
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``cxx_right_angle_brackets``
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Right angle bracket parsing, as defined in N1757_.
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.. _N1757: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html
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``cxx_rvalue_references``
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R-value references, as defined in N2118_.
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.. _N2118: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2118.html
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``cxx_sizeof_member``
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Size of non-static data members, as defined in N2253_.
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.. _N2253: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2253.html
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``cxx_static_assert``
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Static assert, as defined in N1720_.
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.. _N1720: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.html
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``cxx_strong_enums``
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Strongly typed enums, as defined in N2347_.
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.. _N2347: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf
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``cxx_thread_local``
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Thread-local variables, as defined in N2659_.
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.. _N2659: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2659.htm
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``cxx_trailing_return_types``
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Automatic function return type, as defined in N2541_.
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.. _N2541: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm
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``cxx_unicode_literals``
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Unicode string literals, as defined in N2442_.
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.. _N2442: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm
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``cxx_uniform_initialization``
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Uniform initialization, as defined in N2640_.
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.. _N2640: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2640.pdf
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``cxx_unrestricted_unions``
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Unrestricted unions, as defined in N2544_.
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.. _N2544: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2544.pdf
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``cxx_user_literals``
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User-defined literals, as defined in N2765_.
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.. _N2765: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2765.pdf
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``cxx_variadic_macros``
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Variadic macros, as defined in N1653_.
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.. _N1653: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1653.htm
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``cxx_variadic_templates``
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Variadic templates, as defined in N2242_.
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.. _N2242: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2242.pdf
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Individual features from C++ 14
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"""""""""""""""""""""""""""""""
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``cxx_aggregate_default_initializers``
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Aggregate default initializers, as defined in N3605_.
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.. _N3605: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3605.html
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``cxx_attribute_deprecated``
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``[[deprecated]]`` attribute, as defined in N3760_.
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.. _N3760: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3760.html
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``cxx_binary_literals``
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Binary literals, as defined in N3472_.
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.. _N3472: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3472.pdf
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``cxx_contextual_conversions``
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Contextual conversions, as defined in N3323_.
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.. _N3323: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3323.pdf
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``cxx_decltype_auto``
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``decltype(auto)`` semantics, as defined in N3638_.
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.. _N3638: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3638.html
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``cxx_digit_separators``
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Digit separators, as defined in N3781_.
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.. _N3781: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3781.pdf
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``cxx_generic_lambdas``
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Generic lambdas, as defined in N3649_.
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.. _N3649: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3649.html
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``cxx_lambda_init_captures``
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Initialized lambda captures, as defined in N3648_.
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.. _N3648: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3648.html
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``cxx_relaxed_constexpr``
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Relaxed constexpr, as defined in N3652_.
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.. _N3652: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3652.html
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``cxx_return_type_deduction``
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Return type deduction on normal functions, as defined in N3386_.
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.. _N3386: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3386.html
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``cxx_variable_templates``
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Variable templates, as defined in N3651_.
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.. _N3651: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3651.pdf
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