split_dwarf_kind

split dwarf variant (only if -Csplit-debuginfo is enabled and on relevant platform) (default: split)

    `split`: sections which do not require relocation are written into a DWARF object (`.dwo`)
             file which is ignored by the linker
    `single`: sections which do not require relocation are written into object file but ignored
              by the linker

This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.