cmake HAVE_SSSE3_EXTENSIONS examples

chsl/PLADE code/3rd_party/pcl-1.8.1/cmake/pcl_find_sse.cmake :99 

check_cxx_source_runs("
        #include <tmmintrin.h>
        int main ()
        {
          __m128i a, b;
          int vals[4] = {-1, -2, -3, -4};
          a = _mm_loadu_si128 ((const __m128i*)vals);
          b = _mm_abs_epi32 (a);
          _mm_storeu_si128 ((__m128i*)vals, b);
          return (0);
        }"
        HAVE_SSSE3_EXTENSIONS)

chsl/PLADE code/3rd_party/pcl-1.8.1/cmake/pcl_find_sse.cmake :175 

elseif(HAVE_SSSE3_EXTENSIONS)