I'd like us to enable -gdwarf-4 by default in F16.
I'd really like .debug_types-writing to be a separate knob from "v4
format".
The v4 format has many good improvements like DW_FORM_flag_present that are
always desireable when consumers can handle them. .debug_types and
DW_FORM_ref_sig8 are not in the same category at all.
Thanks,
Roland