stabs changes for 64 bit targets

[Joern Rennecke]

Quoting Jakub Jelinek <jakub@redhat.com>:

> On Mon, May 13, 2013 at 10:45:46AM -0400, David Taylor wrote:
>> There are problems when using current STABS debug format for 64 bit
>> targets.
>
> Why are you considering extending STABS at this point?
> STABS support might very well be dropped altogether from GCC 4.9 or the next
> release, people just should use DWARF[234] everywhere.

I find stabs is still helpful when you try to inspect the assembly output
by hand (or more precisely, by visual inspection in a text editor / pager).