Added support for sse2, rdtsc, and iaca on *nix. Should work with gcc and clang but I didn't test with clang. See the attachment for the diff against the end of day 120.
It would be helpful if this or something like it were integrated on the stream.
maybe this rdtsc def is better?
alternateTSC - http://www-unix.mcs.anl.gov/~kazutomo/rdtsc.html
Also updated xcb_handmade to day 120 and sent a pull request to the maintainer.
The address is https://github.com/manypeople/xcb_handmade
I forgot to mention, though it doesn't seem to matter on windows, on *nix
the "IACA_END" needs to be outside the end of the loop IACA_START is in. You
can see the IACA manual for details.