| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| include(Compiler/CMakeCommonCompilerMacros) |
| |
| if ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.0.24215.1 AND |
| CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19.10) OR |
| CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.10.25017) |
| |
| # VS 2015 Update 3 and above support language standard level flags, |
| # with the default and minimum level being C++14. |
| set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "") |
| set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "") |
| set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std:c++14") |
| set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std:c++14") |
| if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.11.25505) |
| set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++17") |
| set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++17") |
| else() |
| set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++latest") |
| set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++latest") |
| endif() |
| if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.12.25835) |
| set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std:c++latest") |
| set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std:c++latest") |
| endif() |
| |
| __compiler_check_default_language_standard(CXX 19.0 14) |
| |
| # All features that we define are available in the base mode, except |
| # for meta-features for C++14 and above. Override the default macro |
| # to avoid doing unnecessary work. |
| macro(cmake_record_cxx_compile_features) |
| if (DEFINED CMAKE_CXX20_STANDARD_COMPILE_OPTION) |
| list(APPEND CMAKE_CXX20_COMPILE_FEATURES cxx_std_20) |
| endif() |
| # The main cmake_record_cxx_compile_features macro makes all |
| # these conditional on CMAKE_CXX##_STANDARD_COMPILE_OPTION, |
| # but we can skip the conditions because we set them above. |
| list(APPEND CMAKE_CXX17_COMPILE_FEATURES cxx_std_17) |
| list(APPEND CMAKE_CXX14_COMPILE_FEATURES cxx_std_14) |
| list(APPEND CMAKE_CXX98_COMPILE_FEATURES cxx_std_11) # no flag needed for 11 |
| _record_compiler_features_cxx(98) |
| endmacro() |
| elseif (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0) |
| # MSVC has no specific options to set language standards, but set them as |
| # empty strings anyways so the feature test infrastructure can at least check |
| # to see if they are defined. |
| set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "") |
| set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "") |
| set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "") |
| set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "") |
| set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "") |
| set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "") |
| |
| # There is no meaningful default for this |
| set(CMAKE_CXX_STANDARD_DEFAULT "") |
| |
| # There are no compiler modes so we only need to test features once. |
| # Override the default macro for this special case. Pretend that |
| # all language standards are available so that at least compilation |
| # can be attempted. |
| macro(cmake_record_cxx_compile_features) |
| list(APPEND CMAKE_CXX_COMPILE_FEATURES |
| cxx_std_98 |
| cxx_std_11 |
| cxx_std_14 |
| cxx_std_17 |
| cxx_std_20 |
| ) |
| _record_compiler_features(CXX "" CMAKE_CXX_COMPILE_FEATURES) |
| endmacro() |
| endif() |