I was able to speak to Tristan, yesterday, and he confirmed that we haven't been able to contribute a few of the patches he wrote. Unfortunately, his TODO list is more than full, at the moment, and we don't think he'll have time to work on that for a while. I might have time in the next few weeks to track them down - if I do, I will post them.
With all patches, we are able to bootstrap GCC 4.7. But we haven't tried the HEAD version. From David's report, it sounds like we should expect additional work if we want to do it. -- Joel
