/usr/arm-linux-gnueabihf/lib/libgnat-7.so is in gnat-7-arm-linux-gnueabihf 7.3.0-16ubuntu3cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/arm-linux-gnueabihf/lib/libgnat-7.so.1
/usr/arm-linux-gnueabihf/lib/libgnat-7.so.1