[Bug lto/53808] Undefined symbol when building a library with lto

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53808

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #6)
> I just tried to reproduce the bug before checking my patch in for 4.9, and
> couldn't; my patch seems to make no difference to the cgraph output for
> def.cpp.

...but it does make a difference to undef.cpp.  Never mind.