Re: [hjl@lucon.org: Re: your patch to remove unused sections]

[Alan Modra <amodra at bigpond dot net dot au>]

On Mon, Apr 11, 2005 at 07:09:30AM -0700, H. J. Lu wrote:
> Hi Alan,
> 
> Have you looked at this patch?

Yes, I was going to ask for a revision, but wanted to check whether my
idea was feasible before asking you to make a change, which would remove
the following loop:

> +	  /* .bss and similar sections won't have the linker_mark
> +	     field set.  We have to check if its output section is
> +	     included in output_bfd.  */
> +	  for (sec = output_bfd->sections; sec != NULL; sec = sec->next)
> +	    if (sec == sym->section->output_section)
> +	      break;

I haven't had time to check, but here's the idea anyway:  After removing
an unused output section s with bfd_section_list_remove (output_bfd, s),
clear s->next.  Then

  if (sym->section->output_section->next == NULL
      && *output_bfd->section_tail != sym->section->output_section)
    {
      /* The section has been removed.  */
    }

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre