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131c721f54
Visual Studio 2015 Update 3 introduced the notion of language standard levels to MSVC. The language standard level is defined in `_MSVC_LANG` instead of `__cplusplus`. It also added support for the `-std:c++14` and `-std:c++latest` flags, although the compiler defaults to its C++14 mode anyway. Visual Studio 2017 Update 3 will introduce support for the `-std:c++17` flag. Fixes: #16482
40 lines
1.7 KiB
CMake
40 lines
1.7 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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include(Compiler/CMakeCommonCompilerMacros)
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if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.10.25017)
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# VS 2015 Update 3 and above support language standard level flags,
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# with the default and minimum level being C++14.
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std:c++14")
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set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std:c++14")
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if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.11.25505)
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++17")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++17")
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else()
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++latest")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++latest")
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endif()
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__compiler_check_default_language_standard(CXX 19.0 14)
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elseif (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0)
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# MSVC has no specific options to set language standards, but set them as
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# empty strings anyways so the feature test infrastructure can at least check
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# to see if they are defined.
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "")
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# There is no meaningful default for this
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set(CMAKE_CXX_STANDARD_DEFAULT "")
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endif()
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