#include <sys/uio.h>

#define T(t) (t*)0;

#define F(t,n) {t *y = &x.;;}

static void f()

{

T(size_t)

T(ssize_t)

{

struct iovec x;

F(void *,iov_base)

F(size_t,iov_len)

}

{ssize_t(*p)(int,const struct iovec*,int) = readv;}

{ssize_t(*p)(int,const struct iovec*,int) = writev;}

}