I need to include Eigen library in my Android Studio project to do some linear algebra operations and use some C++ code that I’ve developed for desktop. I’ve been looking for information on this topic, but there isn’t too much and I’m new on Android NDK. Eigen library doesn’t need to be compiled, so I thought It would be easy, but I’m missing something. I’ve tried to copy the Eigen folder (which have all the includes) into the NDK folder (..\Android\Sdk\ndk-bundle\sysroot\usr\include) where there are other exteral libraries (GLES for example) but Android Studio don’t detect it. How can I do it?? Thank you in advance, I really need this.