Can someone explain this code? - Mailing list pgsql-hackers

int
pg_fe_sendauth(AuthRequest areq, PGconn *conn, const char *hostname,           const char *password, char *PQerrormsg)
{
#ifndef KRB5(void) hostname;            /* not used */
#endif

...

(fe-auth.c)

What does that code actually *do*?

//Magnus