PR12760 plugin vs. warning syms

[H.J. Lu]

On Mon, May 16, 2011 at 1:29 AM, Alan Modra <amodra@gmail.com> wrote:
> On Sun, May 15, 2011 at 06:37:58PM -0700, H.J. Lu wrote:
>> We must call bfd_link_repair_undef_list when we change symbol
>> type to bfd_link_hash_undefweak.  Otherwise, assert may fail in:
>>
>> void
>> bfd_link_add_undef (struct bfd_link_hash_table *table,
>>                     struct bfd_link_hash_entry *h)
>> {
>>   BFD_ASSERT (h->u.undef.next == NULL);
>
> How could that happen?  We know the new symbol is a definition.
>

After we turned a definition into an undefweak, we may see a reference in
LTO output, which will call bfd_link_add_undef.


-- 
H.J.