Create a LIBITO enviroment variable which points at the root of the
directory into which you have instaled libito.

If you which to use the make target 'run' which uses ps2client to execute
the ELF on the PS2. You need to installed ps2client and create a enviroment
variable named PS2_IP, note the underscore, which holds the IP address of your
PS2.

You need the 3.2.2 toolchain to use libito, it also requires the lastest version
of ps2sdk.