Which compiler currently supports the completely new C language standard?

Question

C++ / C#

Hello.
Which compiler is currently covered the most by the new C11 standard ?
Subtracted here. What is only for the Development version of the GCC 4.9.0 compiler is that

ISO C11 support is now at a similar level of completeness to ISO C99 support: substantially complete modulo bugs...

What I'm most interested in is full support for C11 threads in compilers?
Please advise :)

Answer 1

Found only about GCC: gcc.gnu.org/wiki/C11Status (atomic and generic are not supported). There was no detailed information about clang.

Answer 2

Perhaps clang is now ahead of the rest.
The following table will probably help you - wiki.apache.org/stdcxx/C++0xCompilerSupport