cpplib: fix -Wtrigraphs double warnings

[Geoff Keating]

> Date: Thu, 23 Nov 2000 09:03:48 -0800
> From: "Zack Weinberg" <zackw@Stanford.EDU>
> Cc: gcc@gcc.gnu.org

> On Thu, Nov 23, 2000 at 08:47:47AM -0800, Geoff Keating wrote:
> > "Zack Weinberg" <zackw@Stanford.EDU> writes:
> > 
> > > On Wed, Nov 22, 2000 at 08:22:28PM +0000, Neil Booth wrote:
> > > > And a testcase (Wtrigraphs.c):-
> > > 
> > > I'm not sure this will fail in the presence of the bug.  The existing
> > > trigraphs test should've picked it up, but it didn't.
> > > 
> > > I don't know what to do about it, though; it's a design problem with
> > > dg.exp.  The "excess errors" test doesn't distinguish between one copy
> > > of an error mesage, and multiple copies.
> > 
> > Are you sure you have the latest dejagnu?
> > 
> > I'm sure I've seen test failures in the regression tester caused
> > by this.
> 
> I have the 20000714 snapshot.  Should I be using something newer?

I'm not sure.  The regression tester's currently using a version from
CVS on 20001116.

-- 
- Geoffrey Keating <geoffk@geoffk.org>