/usr/bin/arm-linux-gnueabihf-gdc is in gdc-arm-linux-gnueabihf 4:8-20180321-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/arm-linux-gnueabihf-gdc-8
/usr/bin/arm-linux-gnueabihf-gdc-8