Error during make install

[cggaurav]

Lovely project, this issue.

/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2348:29: error: no member named 'val' in 'cv::Scalar_<float>'
    return Scalar_<float>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                          ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2348:43: error: no member named 'val' in 'cv::Scalar_<float>'
    return Scalar_<float>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                                        ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2348:57: error: no member named 'val' in 'cv::Scalar_<float>'
    return Scalar_<float>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                                                      ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2348:71: error: no member named 'val' in 'cv::Scalar_<float>'
    return Scalar_<float>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                                                                    ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2355:30: error: no member named 'val' in 'cv::Scalar_<double>'
    return Scalar_<double>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                           ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2355:44: error: no member named 'val' in 'cv::Scalar_<double>'
    return Scalar_<double>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                                         ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2355:58: error: no member named 'val' in 'cv::Scalar_<double>'
    return Scalar_<double>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                                                       ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2355:72: error: no member named 'val' in 'cv::Scalar_<double>'
    return Scalar_<double>(a.val[0] * s, a.val[1] * s, a.val[2] * s, a.val[3] * s);
                                                                     ~ ^
/usr/local/opt/opencv/include/opencv4/opencv2/core/types.hpp:2388:24: error: no matching constructor for initialization of 'Matx<double, 4, 1>'
    Matx<double, 4, 1> c((Matx<double, 4, 4>)a, b, Matx_MatMulOp());

[szanni]

Which operating system and which version of OpenCV (check with opencv_version)?

It works on my system, but OpenCV sadly has a bad habit of constantly breaking its API.