Had to dust off an ancient piece of code from 2004 that used an early version of Processing. Amused to see the supported platforms list in the source:
@jonbro Yeah, a lot of our earliest work (1998-2002 or so?) was on Irix machines. (Part of where Processing came from was the idea that writing C++ on an SGI workstation was not a good way to rapidly sketch ideas.)
While it wasn't something I had planned to support for Processing, someone in the community had submitted a couple lines of code to help it work there, so I made it part of the list to trigger his fixes.