Re: Bizarre GCC problem - how do I debug it?

[Richard Guenther]

On Fri, Aug 6, 2010 at 8:41 PM, Tom Tromey <address@hidden> wrote:
>>>>>> "Bruce" == Bruce Korb <address@hidden> writes:
>
> Bruce> That seems to work.  There are one or two or three bugs then.
> Bruce> Either gdb needs to recognize an out of sync object code, or else
> Bruce> gcc needs to produce object code that forces gdb to object in a way
> Bruce> more obvious than just deciding upon the wrong file and line --
> Bruce> or both.
>
> Nothing can be done about old versions of gdb.  They are fixed.
>
> I think the situation is better in newer versions of GDB.  We've fixed a
> lot of bugs, anyway.  (I'm not sure exactly what problem you hit, so I
> don't know if gdb is in fact any more future-proof in that area.)
>
> I don't think things can ever be perfect.  GDB checks the various DWARF
> version numbers, but that doesn't exclude extensions.
>
> Bruce> I simply installed the latest openSuSE and got whatever was
> Bruce> supplied.  It isn't reasonable to expect folks to go traipsing
> Bruce> through upstream web sites looking for "changes.html" files ....
>
> In a situation like this, I suggest complaining to your vendor.  We've
> done a lot of work in GDB to catch up with GCC's changing output.  The
> development process here is actually reasonably well synchronized.

The gdb version on openSUSE that ship with GCC 4.5 is perfectly fine
(it's 7.1 based).  No idea what the reporter is talking about (we don't ship
insight IIRC).

Richard.

> Tom
>