set(_cmake_oldestSupported "((__clang_major__ * 100) + __clang_minor__) >= 501") set(AppleClang_C11 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L") set(_cmake_feature_test_c_static_assert "${AppleClang_C11}") set(AppleClang_C99 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L") set(_cmake_feature_test_c_restrict "${AppleClang_C99}") set(_cmake_feature_test_c_variadic_macros "${AppleClang_C99}") set(AppleClang_C90 "${_cmake_oldestSupported} && !defined(__STDC_VERSION__)") set(_cmake_feature_test_c_function_prototypes "${AppleClang_C90}")