sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libstdc++-4.8-dev-arm64-cross : Depends: libstdc++6-arm64-cross (>= 4.8.4-2ubuntu1~14.04.1cross0.11.1) but 4.8.2-13ubuntu1cross0.11 is installed
 libstdc++6-4.8-dbg-arm64-cross : Depends: libstdc++6-arm64-cross (>= 4.8.4-2ubuntu1~14.04.1cross0.11.1) but 4.8.2-13ubuntu1cross0.11 is installed
 libstdc++6-arm64-cross : Depends: gcc-4.8-aarch64-linux-gnu-base (= 4.8.2-13ubuntu1cross0.11) but 4.8.4-2ubuntu1~14.04.1cross0.11.1 is installed
E: Unmet dependencies. Try using -f.