https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42540
--- Comment #24 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- For completeness, this is what LLD says: ld.lld: error: undefined symbol: vtable for A >>> referenced by example.cpp:7 >>> /tmp/example-5d8b98.o:(A::A()) >>> the vtable symbol may be undefined because the class is missing its key >>> function (see https://lld.llvm.org/missingkeyfunction) which seems better.
