Package gcc-aarch64-linux-gnu is not available, but is referred to by another package.This may mean that the package is missing, has been obsoleted, oris only available from another source Package g++-aarch64-linux-gnu is not available, but is referred to by another package....
Thisisfree software; see the sourceforcopying conditions. ThereisNO warranty; not evenforMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Written by Roland McGrath and Ulrich Drepper. root@ubuntu:~# whereis libc.so.6libc.so:/lib/aarch64-linux-gnu/libc.so.6/usr/lib/aarch64-linux-gnu/...