try to install gcc-multilib, and failed.
pls, help..

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pi@NanoPi-NEO2:~$ sudo apt-get update
Hit:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports xenial-backports InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports xenial-security InRelease
Reading package lists... Done


pi@NanoPi-NEO2:~$ sudo apt-get install gcc-multilib
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
gcc-multilib:armhf : Depends: gcc:armhf (>= 4:5.3.1-1ubuntu1) but it is not going to be installed
Depends: gcc-5-multilib:armhf (>= 5.3.1-3~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.