To compile gtk-gnutella:
those are the commands to use. the only command you need root priveledges is the make install command.
i don't use gtk-gnutella, so i'm not sure, but i think the first command is "./configure" with no quotes.
so basically if you the extracted folder from the tarball is called gtk-gnutella and that folder is in /home/user (where your user name is user) do this in this order in a shell terminal:
2. cd gtk-gnutella
5. su -
6. make install
#1 is only if you're in some other folder. the cd command by itself will take you to your home directory (in the example above, /home/user).
edit: grammer. blame the cubs.