title: compile gpu samples at ubuntu by terminal
body: <p>I have installed all the necessary programs to compile opencv with Nvidia (GPU), I have installed the drivers, CUDA tool kit, libraries_sdk, &amp; finally OpenCV.</p>
  
  <p>I have succeeded to compile the OpenCV C &amp; CPP samples by compiling buildall.sh. now I need to compile the GPU samples. </p>
  
  <p>my question is: What is the Ubuntu 13.10 terminal command needed to compile the GPU OpenCV Samples, for example "optical_flow.cpp"?</p>