[C] undefined references to 'memcpy'

[robboso]

ciao a tutti

typedef struct {
	U32 entry_hi;
	U32 cause;
	U32 status;
	U32 pc_epc;  /* pc in the new area, epc in the old area */
	U32 gpr[31];
	U32 hi;
	U32 lo;				
} state_t;


typedef struct tcb_t {   		       	/* thread control block */
        tid_t           tid;            	/* thread identifier */
        status_t        status; 		/* thread's status */
	state_t  	proc_state;		/* processor state */
        struct tcb_t    *t_next,       		/* pointer to next entry in the thread queue */
			*t_prev,        	/* pointer to next entry in the thread queue */
                        *inbox;         	/* threads waiting to send a message to this thread */
        
} tcb_t;



static state_t GetTState(tid_t tid)
{
	tcb_t *tmp;
	state_t stato;

	if(tid == 255)
		tid=CurrentThread->tid;
	tmp=resolveTid(tid); /*     questa funzione prende un tid e ritorna un puntatore al thread block tcb_t*/
	if(tmp != NULL){ 
		stato=tmp->proc_state;
		return stato;
	}
	else killTcb(tid); /*         termina il tcb_t corrispondente a tid*/
}

in fase di compilazione ho questo errore:

ssi.o(.text+0xd04): In function `GetTState':
: undefined reference to `memcpy'
ssi.o(.text+0xd2c): In function `GetTState':
: undefined reference to `memcpy'

io non faccio nessuna chiamata memcpy

qualcuno di cosa si tratta???