C99 still works, but in theory we're using C11 features already, such as stdatomic.h. gcc/clang let us use it in C99 mode too, but using C11 is at least more proper.
C99 still works, but in theory we're using C11 features already, such as stdatomic.h. gcc/clang let us use it in C99 mode too, but using C11 is at least more proper.