> I'd say we should switch to version 4 only when we need the new fields > (i.e. if ia64 or other VLIW starts using the new VLIW .debug_line features, > let it use version 4, but for other targets 3 would be good enough). > Similarly for .debug_frame.
I agree that makes sense. The .debug_info v4 format is superior in the smallness of some of its encodings like DW_FORM_flag_present, so it is worth always using that format when it's enabled. The others don't provide any benefit by themselves. Thanks, Roland
