PS3 Cell SDK 2.1

I've been getting some compatibility questions about my PS3 Ray Tracer code, so I just upgraded my PS3 to Fedora Core 6 and Cell SDK 2.1. IBM changed the SPU thread API (to pthreads); I now provide code for both versions. They also now have a PPC native version of the IBM XLC compiler. It provides an over 50% performance improvement over GCC: