Phoronix: GCC 4.7 RC2 Released; The State Of C99 Support
The second release candidate of GCC 4.7 is available today for those wishing to try out this open-source compiler that will be officially released in the coming weeks. Separately, there's also updated documentation concerning the state of the C99 language support...
Here's a link to a readable version of the GCC 4.7 C99 status page, which was referenced in the article but not linked directly to: http://gcc.gnu.org/gcc-4.7/c99status.html