I got code from AustinSchuh, Ross Light, and Cody Schafer. The initial code and concept is all to the credit of Austin Schuh. Ross Light did some initial work on this base to make it more configurable, and Cody Schafer added several patches to enhance the support. He also updated the patches to work with 4.7 and found several new issues. After much negotiating I was able to get the effective equivalent of the patches into GCC itself as part of the fixincludes subsystem, and I corrected an issue with the installation header paths with the current build scripts. Though I still have one bug open against GCC, most of the hard work is finished and now it's the tedious maintenance that has to be done.
Felt like they deserved to be called out since they did all the heavy lifting of actually getting a working compiler, in the dark ages of the project when it wasn't clear if it was actually going to be a feasible amount of effort or not...
Anyway, I have compiled binaries on my system. Once I've completed testing and got WPILib up and running I'll post the results. They will be targeted at debian unstable aka testing aka wheezy, but they should be fine on any deb-based distro, and alien might work for rpm-based distros (which can of course still do a manual build).
Everything should be ready for release NLT Saturday, so if you want to play around with it there should be plenty of time during build season to do so
EDIT: Used real names instead - they're available from all of their github pages anyway...