I agree, don't change anything - I think I'll send these issues to our Apple 
reps to see if we can get some answers here.  This is an important issue that 
should be resolved by the vendor.
Cody

On Sep 17, 2010, at 9:03 AM, John Peterson wrote:

> On Fri, Sep 17, 2010 at 9:58 AM, Roy Stogner <[email protected]> wrote:
>> 
>> 
>> On Fri, 17 Sep 2010, Ming Q wrote:
>> 
>>> I saw the same problem of dynamic casting. I have to work around by using 
>>> GNU compiler instead.
>> 
>> One stupid question and one serious one, for everybody:
>> 
>> Is there any place in XCode where they're turning on -fno-rtti by
>> default, and if so can that be user-disabled?
>> 
>> Should we go through the library and change the rest of our
>> dynamic_cast operations to libmesh_cast_*?
> 
> I don't think we should change all of them!  There are cases in the
> numerics classes where the intent is to downcast to a more derived
> type, e.g. a PetscVector.  You'd have to look at each case by hand,
> which sounds like a pain.
> 
> -- 
> John
> 
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