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# 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 19.10.25017)
# 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()
__compiler_check_default_language_standard(CXX 19.0 14)
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 "")
# There is no meaningful default for this
set(CMAKE_CXX_STANDARD_DEFAULT "")
endif()
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