Slow lang_insert_orphan

[Nick Clifton]

Hi H. J.

> When we have many orphaned sections, lang_insert_orphan spends lots
> of time in
> 
> /* Unlink the section.  */
> for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
>   continue;
> 
> It is the case of 64K section ld test. Use a doubly linked list
> for section may help. But it will add a pointer to bfd_section. Should
> I give a try?

I am reluctant to increase the size of the bfd_section structure.  Maybe 
  lang_insert_orphans() could be made smarter with a different algorithm 
?  Possibly it could keep a local bitmap or list of sections to unlink 
and then only unlink them all right at the end ?

Cheers
   Nick