make grokfield handle locations

[Janis Johnson]

On Wed, 2008-08-20 at 14:18 -0400, Aldy Hernandez wrote:
> > How does this look?  It tests both diagnostics changed as you have
> > requested.
> 
> BTW, Tom noticed a mistaken removal of verbose, which I've fixed.
> 
> It is also worth noting that I have inhibited -fno-show-column from
> being passed down to individual tests, since even passing
> "-fshow-column" to individual tests gets overriden by the global
> -fno-show-column.

Yes, I noticed that, it makes sense.

> It is my understanding that -fno-show-column was being passed because
> -fshow-column was the default in GCC at one time.  Since this is no
> longer the case, we can now pass -fshow-column only when needed.

Right.

Janis