Yes, there is a C11 standard. See for instance http://en.wikipedia.org/wiki/C11_%28C_standard_revision%29 http://en.wikipedia.org/wiki/C11_%28C_standard_revisio

Yes, there is a C11 standard. See for instance http://en.wikipedia.org/wiki/C11_%28C_standard_revision%29 http://en.wikipedia.org/wiki/C11_%28C_standard_revision%29 for a list of new features in C11. But no, it doesn't implement these things. Here's a handy table showing GCC's support: https://gcc.gnu.org/wiki/C11Status https://gcc.gnu.org/wiki/C11Status. I'm pretty sure Clang supports C11 well too, didn't find a corresponding table though. It says "By default, Clang builds C code in GNU C11 mode [...]" on this page: http://clang.llvm.org/compatibility.html http://clang.llvm.org/compatibility.html.