cmake HAVE_AVX512_INTRIN examples

InsightSoftwareConsortium/ITK Modules/ThirdParty/ZLIB/src/itkzlib-ng/cmake/detect-intrinsics.cmake :102

check_c_source_compiles(
        "#include <immintrin.h>
        __m512i f(__m512i y) {
          __m512i x = _mm512_set1_epi8(2);
          return _mm512_sub_epi8(x, y);
        }
        int main(void) { return 0; }"
        HAVE_AVX512_INTRIN
    )