[PATCH] gold: make the kept comdat structure have a direct link to sections map

[Cary Coutant]

> 2009-02-27  Mikolaj Zalewski  <mikolajz@google.com>
>        * layout.cc (find_or_add_comdat): a more generic version of add_comdat
>        (add_comdat): removed
>        * layout.h (Kept_section): move out of Layout
>        (Kept_section::group_sections_): new field
>        (Layout::Kep_section): remove

"Kept_section"

>        (find_or_add_comdat): a more generic version of add_comdat
>        (add_comdat): removed
>        * object.cc (include_section_group): use find_or_add_comdat and
> Kept_section::group_sections_
>        (include_linkonce_section): use find_or_add_comdat and
> Kept_section::group_sections_
>        * object.cc (Comdat_group): removed
>        (Comdat_group_table): removed
>        (find_comdat_grouop): removed
>        (add_comdat_group): removed
>        (comdat_groups_): removed
>        * plugin.cc (include_comdat_group): use the new Layout::find_or_add_comdat

Your patch looks good to me -- a definite improvement. Thanks!

(I don't have authority to approve, though -- wait for Ian's comments.)

-cary