PATCH: 2 stage BFD linker for LTO plugin

[Dave Korn]

On 06/12/2010 02:20, H.J. Lu wrote:

>>>>> BTW, the new linker passed bootstrap-lto with all default languages.
>>>>> I am planning to include this patch in the next Linux binutils.
>>>>>
>>>> I missed the IR object in an archive:
>>>>
>>>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42690#c34
>>>>
>>>> This updated patch fixed it.  OK for trunk?
>>>>
>>> We shouldn't clear SEC_EXCLUDE if BFD_PLUGIN is set:
>>>
>>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42690#c38
>>>
>>> This updated patch fixed it.  OK for trunk?
>>>
>> It turns out that my patch also fixes:
>>
>> http://sourceware.org/bugzilla/show_bug.cgi?id=12277
>>
> 
> Updated patch, adjusted for plugin ELF symbol visibility bug fix.
> OK for trunk?

  Well, I reckon this patch is great (but don't have the approval rights).
It's passed an lto-bootstrap of gcc on i686-pc-cygwin and the tests are well
underway without anything abnormal showing up.

> +	  /* Free the old already linked table and create a new one.  */
> +	  bfd_section_already_linked_table_free ();
> +	  if (!bfd_section_already_linked_table_init ())
> +	    einfo (_("%P%F: Failed to create hash table\n"));
> +
> +	  /* Free the old hash table and create a new one.  */
> +	  bfd_link_hash_table_free (link_info.output_bfd,
> +				    link_info.hash);
> +	  link_info.hash
> +	    = bfd_link_hash_table_create (link_info.output_bfd);
> +	  if (link_info.hash == NULL)
> +	    einfo (_("%P%F: can not create hash table: %E\n"));

  If I had known that there was really this little stored state to be unwound
and regenerated, I would have wanted to do it this way in the first place.

> +typedef struct cmdlin_header_struct

  Typo there.

  Tristan, sorry, you must be sick of hearing from me by now, but I notice the
branch was still labile a couple of hours ago... it would be really good if we
could get HJ's patch approved and backported before you spin the release.

    cheers,
      DaveK