Build opencv with LAPACK/EIGEN for ios/android

cant help with LAPACK, but adding Eigen support should be as easy as:

  • download : http://eigen.tuxfamily.org/ and unzip
    (it is a “headers only” lib, no “install” needed)
  • WITH_EIGEN=ON (cmake)
  • EIGEN_INCLUDE_PATH=/path/to/Eigen_toplevel_folder (cmake)

carefully observe the cmake output,
it should show up under " Other third-party libraries:"