<stdatomic.h> in GCC 4.8?

I'd like to make use of the new atomic operations provided by the C11 standard. However, trying to `#include` the appropriate header file gives me this: ``` csort-par.c:5:23: fatal error: stdatomic.h: No such file or directory #include <stdatomic.h> ``` The documentation at http://gcc.gnu.org/wiki/C11Status seems to say that the header file has been provided since GCC 4.7... am I missing something? `__STDC_NO_ATOMICS__` is not defined. `gcc --version` is as follows: ``` gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1 Copyright (C) 2013 Free Software Foundation, Inc. ``` And I confirmed that `__STDC_NO_ATOMICS__` was not defined as follows: ``` #ifdef __STDC_NO_ATOMICS__ #error yes #else #error no #endif ``` yields: ``` csort-par.c:10:2: error: #error no #error no ``` EDIT: Thanks for the swift replies. In case anyone stumbles on this from Google with the same question, here's a fix in the interim until they release GCC 4.9: UNIX Portable Atomic Operations