cmake HAVE_SSE42_INTRIN examples

InsightSoftwareConsortium/ITK Modules/ThirdParty/ZLIB/src/itkzlib-ng/cmake/detect-intrinsics.cmake :557

check_c_source_compiles(
        "#include <nmmintrin.h>
        unsigned int f(unsigned int a, unsigned int b) { return _mm_crc32_u32(a, b); }
        int main(void) { return 0; }"
        HAVE_SSE42_INTRIN
    )