/usr/bin/arm-linux-gnueabihf-gnatkr is in gnat-8-arm-linux-gnueabihf 8-20180414-1ubuntu2cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/arm-linux-gnueabihf-gnatkr-8
/usr/bin/arm-linux-gnueabihf-gnatkr-8