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Edit File: GNU-CXX-FeatureTests.cmake

# Reference: http://gcc.gnu.org/projects/cxx0x.html # http://gcc.gnu.org/projects/cxx1y.html set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 404") set(GNU50_CXX14 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 500 && __cplusplus >= 201402L") set(_cmake_feature_test_cxx_variable_templates "${GNU50_CXX14}") set(_cmake_feature_test_cxx_relaxed_constexpr "${GNU50_CXX14}") set(_cmake_feature_test_cxx_aggregate_default_initializers "${GNU50_CXX14}") # GNU 4.9 in c++14 mode sets __cplusplus to 201300L, so don't test for the # correct value of it below. # https://patchwork.ozlabs.org/patch/382470/ set(GNU49_CXX14 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 409 && __cplusplus > 201103L") set(_cmake_feature_test_cxx_contextual_conversions "${GNU49_CXX14}") set(_cmake_feature_test_cxx_attribute_deprecated "${GNU49_CXX14}") set(_cmake_feature_test_cxx_decltype_auto "${GNU49_CXX14}") set(_cmake_feature_test_cxx_digit_separators "${GNU49_CXX14}") set(_cmake_feature_test_cxx_generic_lambdas "${GNU49_CXX14}") # GNU 4.3 supports binary literals as an extension, but may warn about # use of extensions prior to GNU 4.9 # http://stackoverflow.com/questions/16334024/difference-between-gcc-binary-literals-and-c14-ones set(_cmake_feature_test_cxx_binary_literals "${GNU49_CXX14}") # The features below are documented as available in GNU 4.8 (by implementing an # earlier draft of the standard paper), but that version of the compiler # does not set __cplusplus to a value greater than 201103L until GNU 4.9: # http://gcc.gnu.org/onlinedocs/gcc-4.8.2/cpp/Standard-Predefined-Macros.html#Standard-Predefined-Macros # http://gcc.gnu.org/onlinedocs/gcc-4.9.0/cpp/Standard-Predefined-Macros.html#Standard-Predefined-Macros # So, CMake only reports availability for it with GNU 4.9 or later. set(_cmake_feature_test_cxx_return_type_deduction "${GNU49_CXX14}") set(_cmake_feature_test_cxx_lambda_init_captures "${GNU49_CXX14}") # Introduced in GCC 4.8.1 set(GNU481_CXX11 "((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= 40801) && __cplusplus >= 201103L") set(_cmake_feature_test_cxx_decltype_incomplete_return_types "${GNU481_CXX11}") set(_cmake_feature_test_cxx_reference_qualified_functions "${GNU481_CXX11}") set(GNU48_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 408 && __cplusplus >= 201103L") set(_cmake_feature_test_cxx_alignas "${GNU48_CXX11}") # The alignof feature works with GNU 4.7 and -std=c++11, but it is documented # as available with GNU 4.8, so treat that as true. set(_cmake_feature_test_cxx_alignof "${GNU48_CXX11}") set(_cmake_feature_test_cxx_attributes "${GNU48_CXX11}") set(_cmake_feature_test_cxx_inheriting_constructors "${GNU48_CXX11}") set(_cmake_feature_test_cxx_thread_local "${GNU48_CXX11}") set(GNU47_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 407 && __cplusplus >= 201103L") set(_cmake_feature_test_cxx_alias_templates "${GNU47_CXX11}") set(_cmake_feature_test_cxx_delegating_constructors "${GNU47_CXX11}") set(_cmake_feature_test_cxx_extended_friend_declarations "${GNU47_CXX11}") set(_cmake_feature_test_cxx_final "${GNU47_CXX11}") set(_cmake_feature_test_cxx_nonstatic_member_init "${GNU47_CXX11}") set(_cmake_feature_test_cxx_override "${GNU47_CXX11}") set(_cmake_feature_test_cxx_user_literals "${GNU47_CXX11}") # NOTE: C++11 was ratified in September 2011. GNU 4.7 is the first minor # release following that (March 2012), and the first minor release to # support -std=c++11. Prior to that, support for C++11 features is technically # experiemental and possibly incomplete (see for example the note below about # cxx_variadic_template_template_parameters) # GNU does not define __cplusplus correctly before version 4.7. # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=1773 # __GXX_EXPERIMENTAL_CXX0X__ is defined in prior versions, but may not be # defined in the future. set(GNU_CXX0X_DEFINED "(__cplusplus >= 201103L || (defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__))") set(GNU46_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 406 && ${GNU_CXX0X_DEFINED}") set(_cmake_feature_test_cxx_constexpr "${GNU46_CXX11}") set(_cmake_feature_test_cxx_defaulted_move_initializers "${GNU46_CXX11}") set(_cmake_feature_test_cxx_enum_forward_declarations "${GNU46_CXX11}") set(_cmake_feature_test_cxx_noexcept "${GNU46_CXX11}") set(_cmake_feature_test_cxx_nullptr "${GNU46_CXX11}") set(_cmake_feature_test_cxx_range_for "${GNU46_CXX11}") set(_cmake_feature_test_cxx_unrestricted_unions "${GNU46_CXX11}") set(GNU45_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 405 && ${GNU_CXX0X_DEFINED}") set(_cmake_feature_test_cxx_explicit_conversions "${GNU45_CXX11}") set(_cmake_feature_test_cxx_lambdas "${GNU45_CXX11}") set(_cmake_feature_test_cxx_local_type_template_args "${GNU45_CXX11}") set(_cmake_feature_test_cxx_raw_string_literals "${GNU45_CXX11}") set(GNU44_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 404 && ${GNU_CXX0X_DEFINED}") set(_cmake_feature_test_cxx_auto_type "${GNU44_CXX11}") set(_cmake_feature_test_cxx_defaulted_functions "${GNU44_CXX11}") set(_cmake_feature_test_cxx_deleted_functions "${GNU44_CXX11}") set(_cmake_feature_test_cxx_generalized_initializers "${GNU44_CXX11}") set(_cmake_feature_test_cxx_inline_namespaces "${GNU44_CXX11}") set(_cmake_feature_test_cxx_sizeof_member "${GNU44_CXX11}") set(_cmake_feature_test_cxx_strong_enums "${GNU44_CXX11}") set(_cmake_feature_test_cxx_trailing_return_types "${GNU44_CXX11}") set(_cmake_feature_test_cxx_unicode_literals "${GNU44_CXX11}") set(_cmake_feature_test_cxx_uniform_initialization "${GNU44_CXX11}") set(_cmake_feature_test_cxx_variadic_templates "${GNU44_CXX11}") # TODO: If features are ever recorded for GNU 4.3, there should possibly # be a new feature added like cxx_variadic_template_template_parameters, # which is implemented by GNU 4.4, but not 4.3. cxx_variadic_templates is # actually implemented by GNU 4.3, but variadic template template parameters # 'completes' it, so that is the version we record as having the variadic # templates capability in CMake. See # http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf # TODO: Should be supported by GNU 4.3 set(GNU43_CXX11 "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}") set(_cmake_feature_test_cxx_decltype "${GNU43_CXX11}") set(_cmake_feature_test_cxx_default_function_template_args "${GNU43_CXX11}") set(_cmake_feature_test_cxx_long_long_type "${GNU43_CXX11}") set(_cmake_feature_test_cxx_right_angle_brackets "${GNU43_CXX11}") set(_cmake_feature_test_cxx_rvalue_references "${GNU43_CXX11}") set(_cmake_feature_test_cxx_static_assert "${GNU43_CXX11}") # TODO: Should be supported since GNU 3.4? set(_cmake_feature_test_cxx_extern_templates "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}") # TODO: Should be supported forever? set(_cmake_feature_test_cxx_func_identifier "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}") set(_cmake_feature_test_cxx_variadic_macros "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}") set(_cmake_feature_test_cxx_template_template_parameters "${_cmake_oldestSupported} && __cplusplus")