CMake/Modules/Compiler/MSVC-C-FeatureTests.cmake

set(_cmake_oldestSupported "_MSC_VER >= 1600")

# Not yet supported:
#set(_cmake_feature_test_c_static_assert "")

set(_cmake_feature_test_c_restrict "_MSC_VER >= 1927")

set(_cmake_feature_test_c_variadic_macros "${_cmake_oldestSupported}")
set(_cmake_feature_test_c_function_prototypes "${_cmake_oldestSupported}")