[patch] dwarf2out: Drop the size + performance overhead of DW_AT_sibling

[Tristan Gingold]

On Oct 17, 2011, at 3:16 PM, Tom Tromey wrote:

>>>>>> "Tristan" == Tristan Gingold <gingold@adacore.com> writes:
> 
> Tom> Another way to look at it is that there have been many changes to GCC's
> Tom> DWARF output in the last few years.  Surely these have broken these
> Tom> DWARF consumers more than this change possibly could.
> 
> Tristan> Yes, but there is -gstrict-dwarf to stay compatible with old behavior.
> 
> Yes, but this change is strictly compliant.

Agreed.

>  What makes it different
> from any other change that was made to make GCC more compliant?
> Hypothetical consumers could also break on those changes.

The others changes were often corner cases, while this one is very visible.

What is wrong with my suggestion of adding a command line option to keep the siblings ?  This option could be removed in a few years if nobody complained about sibling removal.

Tristan.