
Just:

make
make install

to install gkrellm-gnome.so in /usr/local/share/gkrellm/plugins.
Then, when you run gkrellm, go to the plugins page of the config
and enable "gkrellm-gnome".

Or instead of make install, you could just copy the .so file
your ~/.gkrellm/plugins directory and it will be enabled by default
when you run gkrellm.

