This appendix discusses the features of the ISO/IEC 9899:2011, Programming Language - C standard currently supported by the C compiler.
The -std=c11 or -std=gnu11 flag controls compiler recognition of 9899:2011 ISO/C. For more information about the syntax of the -std flag, see Support for Atomic Types.
_Alignas
_Alignof
_Atomic
_Generic
_Noreturn
_Static_assert
_Thread_local