message: cmake: don't use Eigen auto-detection in cross-compiling modes
  Sometimes it tries to use host '/usr/include' directory and garbages
  compiler flags with invalid '-I /usr/include'
diff: @@ -197,7 +197,7 @@ OCV_OPTION(WITH_CUDA "Include NVidia Cuda Runtime support"
  OCV_OPTION(WITH_CUFFT "Include NVidia Cuda Fast Fourier Transform (FFT) library support" ON IF (NOT IOS AND NOT WINRT) )
  OCV_OPTION(WITH_CUBLAS "Include NVidia Cuda Basic Linear Algebra Subprograms (BLAS) library support" ON IF (NOT IOS AND NOT WINRT) )
  OCV_OPTION(WITH_NVCUVID "Include NVidia Video Decoding library support" ON IF (NOT IOS AND NOT APPLE) )
  -OCV_OPTION(WITH_EIGEN "Include Eigen2/Eigen3 support" ON IF (NOT WINRT) )
  +OCV_OPTION(WITH_EIGEN "Include Eigen2/Eigen3 support" ON IF (NOT WINRT AND NOT CMAKE_CROSSCOMPILING) )
  OCV_OPTION(WITH_VFW "Include Video for Windows support" ON IF WIN32 )
  OCV_OPTION(WITH_FFMPEG "Include FFMPEG support" ON IF (NOT ANDROID AND NOT IOS AND NOT WINRT) )
  OCV_OPTION(WITH_GSTREAMER "Include Gstreamer support" ON IF (NOT ANDROID AND NOT IOS AND NOT WINRT) )
  