#define _POSIX_READER_WRITER_LOCKS _POSIX_VERSION
#define _POSIX_ASYNCHRONOUS_IO _POSIX_VERSION
#define _POSIX_SEMAPHORES _POSIX_VERSION
#define _POSIX_READER_WRITER_LOCKS _POSIX_VERSION
#define _POSIX_ASYNCHRONOUS_IO _POSIX_VERSION
#define _POSIX_SEMAPHORES _POSIX_VERSION