CHOLMOD (and dependencies) and g2o arm build for iOS
Just build the dependecies and link generated static libs(or configure xcode to build shared libs) in your project.
AMD, CAMD, CCOLAMD, and COLAMD has been prebuild and put in /SuiteSparse/prebuild directory for building CHOLAMD
This has been tested on arm64(iPhone 6 plus and iPad air2)