[lld] Reading undefined symbols from dynamic objects

[Joerg Sonnenberger]

On Tue, Sep 03, 2013 at 12:03:38PM -0700, Nick Kledzik wrote:
> Bigger question.  What is the rule for ELF (and PE/COFF) for weak
> definitions in shared libraries vs object files?

Good question, I have to check. Note that there are two different cases
here:

(1) The weak symbol is defined.
(2) The weak symbol is not defined.

This patch is strictly about the second case. If it is a weak reference,
the result should be different, but I haven't had a chance to build a
test case for that yet and check if the behavior is correct. Will have
to do that soon enough as NetBSD's libc exercise that anyway.

Joerg