Originally reported in parrot TT #576 (http://trac.parrot.org/parrot/ticket/576)
If we're going to use PIRC, we have to have a way to test it out against existing PIR code. (esp. 'make test'). The best way to start using it is to start using it.
Adding a configure step of --pirc which takes either imcc (the default) or pirc (swap in PIRC) would help facilitate testing.
IMO, we wouldn't need the testing infrastructure that exists for other steps, since this step can/should go away once the default changes.