PING^2: [PATCH v3] elf: Always honor the first definition in shared object and archive

[Nick Clifton]

Hi H.J.

>>> GCC doesn't put builtin function symbol references, which are defined in
>>> the shared C library, in the IR symbol table.  When linker rescans shared
>>> objects and archives for newly added symbol references generated from the
>>> IR inputs, it skips definitions of the builtin functions in shared
>>> objects and archives.
>>>
>>> Add first_hash to elf_link_hash_table to track unreferenced definitions
>>> defined first in shared objects and archives.  Always use them to resolve
>>> any references.

Approved - please apply.

Cheers
   Nick