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.
For completeness, this is what LLD says:
ld.lld: error: undefined symbol: vtable for A 5d8b98. o:(A::A( )) /lld.llvm. org/missingkeyf unction)
>>> referenced by example.cpp:7
>>> /tmp/example-
>>> the vtable symbol may be undefined because the class is missing its key function (see https:/
which seems better.