GCC 4.9.0 is now available for download here http://www.gnu.org/prep/ftp.html. This is a major release for the GNU compiler including substantial new functionality including new features to which many developers have been looking for. 4.9.0 improves on other areas such as generated code, added support for new instruction set extensions, improved and extended support for new language standards including C++11 and 14, Fortran 2008, and C11. The new version also supports the OpenMP 4.0 parallel programming standard for C and C++ as well as a partial implementation of Cilk Plus extension for data and task parallelism and a new runtime whereby a developer can diagnosed undefined behaviors in programs using the Undefined Behavior Sanitizer. Read the full details here.