[Bug other/31359] New: 4.2 branch still generates abort for function casting

[dirtyepic at gentoo dot org]

The eventual consensus of the ml thread "gcc 4.2 more strict check for 
"function called through a non-compatible    type" [1]:

Mark Mitchell wrote:
> > Ian Lance Taylor wrote:
> > 
>> >> I realized that I am still not stating my position very clearly.  I
>> >> don't think we should make any extra effort to make this code work:
>> >> after all, the code is undefined.  I just think 1) we should not
>> >> insert a trap; 2) we should not ICE. 
> > 
> > I agree.  If the inlining thing is indeed a problem (and I can see how
> > it could be, even though you could not immediately reproduce it), then
> > we should mark the call as uninlinable.  Disabling an optimization in
> > the face of such a cast seems more user-friendly than inserting a trap.
> >  Since we know the code is undefined, we're not pessimizing correct
> > code, so this is not a case where to support old code we'd be holding
> > back performance for valid code.
> > 
> > I also agree with Gaby that we should document this as an extension.  If
> > we go to the work of putting it back in, we should ensure that it
> > continues to work for the foreseeable future.  Part of that is writing
> > down what we've decided.

Was there ever any action on this?  AFAICS consensus was that the trap
would be removed and this behaviour be documented as an extension.
There was a bit more discussion of how exactly the documentation would
be worded and the thread petered out.  Fast forwarding to today the
abort is still present and the 4.2 branch (4.2.0-pre20070317 (rev.
123016)) is still unable to build a working openssl (0.9.8e).

I apologize for bringing this up so late in the release cycle.  I only
found this discussion this weekend while searching for some solution to our
openssl issue, which i believe is the only blocker we have left as far
as being gcc-4.2 ready.

[1] http://gcc.gnu.org/ml/gcc/2006-07/msg00037.html


-- 
           Summary: 4.2 branch still generates abort for function casting
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dirtyepic at gentoo dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31359