/usr/bin/mips64-linux-gnuabi64-gccgo is in gccgo-mips64-linux-gnuabi64 4:8-20180321-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/mips64-linux-gnuabi64-gccgo-8
/usr/bin/mips64-linux-gnuabi64-gccgo-8