https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108763
ibuclaw at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ibuclaw at gcc dot gnu.org --- Comment #5 from ibuclaw at gcc dot gnu.org --- I abandoned the idea of supporting RTTI-based variadics years ago. Even the current reference implementation only supports a subset of the x86_64 ABI in its current incarnation as far as I recall. I had considered maybe libffi might allow us to do this, but I didn't see anything that would allow me to say "retrieve the next variadic argument of size SIZE and mode MODE". But I could not see anything that looked exactly as that, even though as I understand there is limited support for constructing a variadic call to a C function.