$ sudo apt-get update
$ sudo apt-get install libgnat-5-sparc64-cross 

libgnat-5-sparc64-cross is installed in your system.

Make ensure the libgnat-5-sparc64-cross package were installed using the commands given below,

$ sudo dpkg-query -l | grep libgnat-5-sparc64-cross *

You will get with libgnat-5-sparc64-cross package name, version, architecture and description in a table

libgnat-5-sparc64-cross package basic information: