Problem with ctype.h

[H.J. Lu]

> 
> Roland McGrath <roland@frob.com> writes:
> 
> > Yes, I think so.  I don't see why any of those types are needed except by
> > <pthread.h>.
> 
> As said, Unix98 requires this.  Otherwise I wouldn't have split the
> pthread.h file in the first place.  See:
> 
> 	http://www.opengroup.org/onlinepubs/7908799/xsh/systypes.h.html
> 

Well, but why are they included in <ctype.h>, <signal.h> and <stdio.h>?
Does any standard say they should be also included?

-- 
H.J. Lu (hjl@gnu.org)