As you probably know, the C++11 aka C++0x standard was published recently. There is "GNU C++0x 4" as an available language, and I had thought it is g++ 4.6 with -std=c++0x commandline arguement. On the yesterday's contest I used a new feature (to_string function), and it didn't compile :(. When will there be support of the new standard and what is "GNU C++0x 4", while it's not described in the related topic?