On 02/10/2015 07:43 PM, Stephen J. Turnbull wrote:
> Eli Zaretskii writes:
> 
>  > > Uh, there is a connection.  Because modern IDEs tend to have useful
>  > > program information when debugging instead of (optimized out).
>  > 
>  > Compile with -Og (which should be the default anyway), and you have
>  > that with GCC/GDB as well.
> 
> Er, most programs I compile default to -O3 (I mean upstream does).  So
> you can't debug a production build even if you have symbols.  Arrgh

What exactly are the DWARF deficiencies that prevent a debugger from
unwinding caller-saved registers to their original values? The
specification seems more than powerful enough for the task.