-- ICV: Downloading ippicv_linux_20151201.tgz... CMake Error at 3rdparty/ippicv/downloader.cmake:73 (file): file DOWNLOAD HASH mismatch

for file: [/home/kj/opencv/3rdparty/ippicv/downloads/linux-808b791a6eac9ed78d32a7666804320e/ippicv_linux_20151201.tgz]
  expected hash: [808b791a6eac9ed78d32a7666804320e]
    actual hash: [51eeee7e982a9742fe260b1315a37c20]

Call Stack (most recent call first): 3rdparty/ippicv/downloader.cmake:110 (_icv_downloader) cmake/OpenCVFindIPP.cmake:237 (include) cmake/OpenCVFindLibsPerf.cmake:12 (include) CMakeLists.txt:539 (include)

CMake Error at 3rdparty/ippicv/downloader.cmake:77 (message): ICV: Failed to download ICV package: ippicv_linux_20151201.tgz. Status=18;"Transferred a partial file" Call Stack (most recent call first): 3rdparty/ippicv/downloader.cmake:110 (_icv_downloader) cmake/OpenCVFindIPP.cmake:237 (include) cmake/OpenCVFindLibsPerf.cmake:12 (include) CMakeLists.txt:539 (include)

-- Configuring incomplete, errors occurred! See also "/home/kj/opencv/build/CMakeFiles/CMakeOutput.log". See also "/home/kj/opencv/build/CMakeFiles/CMakeError.log".

I am totally new to opencv and ubuntu. I tried to run the following code

include < opencv2/opencv.hpp>

int main( int argc, char** argv ) { cv::Mat img = cv::imread(argv[1], -1); if( img.empty() ) return -1; cv::namedWindow( "Example1", cv::WINDOW_AUTOSIZE ); cv::imshow( "Example1", img ); cv::waitKey( 0 ); cv::destroyWindow( "Example1" ); }

I got this error

/usr/bin/ld: ./src/qrr.o: undefined reference to symbol '_ZN2cv6imreadERKNS_6StringEi' //usr/local/lib/libopencv_imgcodecs.so.3.0: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status make: * [qrr] Error 1

I added all includes the added libraries to eclipse. Still I get the error