[Bug c++/61811] [4.10 Regression] Firefox LTO build error due to undefined symbols

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61811

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Maybe -fdump-ipa-cgraph and scanning for
_ZN8nsRefPtrIN3CSF21CC_SIPCCCallMediaDataEED2Ev is enough?