how can this work?

[Guenter Knauf]

in poll/unix.poll.c (which is also compiled for win32) we have:
/* Poll method pollcb.
 * This is probably usable only for WIN32 having WSAPoll
 */
static apr_status_t impl_pollcb_create(apr_pollcb_t *pollcb,
                                       apr_uint32_t size,
                                       apr_pool_t *p,
                                       apr_uint32_t flags)
{
#if APR_HAS_THREADS
    return APR_ENOTIMPL;
#else
    pollcb->fd = -1;
#ifdef WIN32
    if (!APR_HAVE_LATE_DLL_FUNC(WSAPoll)) {
        return APR_ENOTIMPL;
    }
#endif
...
I'm asking me how we ever reach the '#ifdef WIN32' since 
APR_HAS_THREADS=1 in apr.h[w] thus we never come to the '#else' case, or?

Gün.