https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99490
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- That sentence says that they should not be in the DW_TAG_compile_unit in .debug_info.dwo, but may be instead (if present at all) in DW_TAG_skeleton_unit in .debug_info. Haven't checked all, but DW_AT_addr_base is definitely needed whenever something in the dwo refers to .debug_addr (so that one knows to which part of .debug_addr it refers to).
