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Features: Test __GXX_EXPERIMENTAL_CXX0X__ macro for GNU < 4.7 compatibility.

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This commit is contained in:
Stephen Kelly 2015-01-11 16:22:24 +01:00
parent 462c630b8a
commit 938bd94eb0
1 changed files with 12 additions and 7 deletions
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19
Modules/Compiler/GNU-CXX-FeatureTests.cmake
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@ -54,8 +54,13 @@ set(_cmake_feature_test_cxx_user_literals "${GNU47_CXX11}")
# support -std=c++11. Prior to that, support for C++11 features is technically
# experiemental and possibly incomplete (see for example the note below about
# cxx_variadic_template_template_parameters)
# GNU does not define __cplusplus correctly before version 4.7.
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=1773
# __GXX_EXPERIMENTAL_CXX0X__ is defined in prior versions, but may not be
# defined in the future.
set(GNU_CXX0X_DEFINED "(__cplusplus >= 201103L || (defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__))")
# TODO: Should be supported by GNU 4.6
set(GNU46_CXX11 "${_cmake_oldestSupported} && __cplusplus >= 201103L")
set(GNU46_CXX11 "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}")
set(_cmake_feature_test_cxx_constexpr "${GNU46_CXX11}")
set(_cmake_feature_test_cxx_defaulted_move_initializers "${GNU46_CXX11}")
set(_cmake_feature_test_cxx_enum_forward_declarations "${GNU46_CXX11}")
@ -64,13 +69,13 @@ set(_cmake_feature_test_cxx_nullptr "${GNU46_CXX11}")
set(_cmake_feature_test_cxx_range_for "${GNU46_CXX11}")
set(_cmake_feature_test_cxx_unrestricted_unions "${GNU46_CXX11}")
# TODO: Should be supported by GNU 4.5
set(GNU45_CXX11 "${_cmake_oldestSupported} && __cplusplus >= 201103L")
set(GNU45_CXX11 "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}")
set(_cmake_feature_test_cxx_explicit_conversions "${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 "${GNU45_CXX11}")
# TODO: Should be supported by GNU 4.4
set(GNU44_CXX11 "${_cmake_oldestSupported} && __cplusplus >= 201103L")
set(GNU44_CXX11 "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}")
set(_cmake_feature_test_cxx_auto_type "${GNU44_CXX11}")
set(_cmake_feature_test_cxx_defaulted_functions "${GNU44_CXX11}")
set(_cmake_feature_test_cxx_deleted_functions "${GNU44_CXX11}")
@ -90,7 +95,7 @@ set(_cmake_feature_test_cxx_variadic_templates "${GNU44_CXX11}")
# templates capability in CMake. See
# http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf
# TODO: Should be supported by GNU 4.3
set(GNU43_CXX11 "${_cmake_oldestSupported} && __cplusplus >= 201103L")
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}")
@ -98,8 +103,8 @@ 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} && __cplusplus >= 201103L")
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} && __cplusplus >= 201103L")
set(_cmake_feature_test_cxx_variadic_macros "${_cmake_oldestSupported} && __cplusplus >= 201103L")
set(_cmake_feature_test_cxx_func_identifier "${_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")