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

[rafael.espindola at gmail dot com]

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

--- Comment #4 from Rafael Avila de Espindola <rafael.espindola at gmail dot com> ---
The equivalent clang bug (llvm.org/pr13124) just got fixed by avoiding the
devirtualization in this case.

Not sure how similar the issues are internally, but I summarized what I found
in clang in:

http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130902/087810.html