#include <sysdep.h>
#include <tls.h>
--
#ifdef USE_TLS
MULTIPLE_THREADS_OFFSET ((void *) &p_multiple_threads ((pthread_descr) ((void *) 0 - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)) - (void *) 0)
#else
MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads)
#endif