http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48603
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-14
10:06:53 UTC ---
(In reply to comment #3)
> This extension is not about DW_AT_linkage_name vs. DW_AT_MIPS_linkage_name.
> It is about DW_AT_{,MIPS_}linkage_name for DW_TAG_structure_type which did not
> have any meaning before.
>
> The extension is used by GDB DWARF reader, more info at:
> http://sourceware.org/ml/gdb-patches/2011-03/msg00916.html
> =
> It is just an earlier indication of how will be the DW_TAG_typedef DIE named
> for an anonymous struct/class/union.
>
> I do not know if it has anything to do with LTO inside GCC. FYI this
> DW_AT_{,MIPS_}linkage_name is fully qualified = already contains namespaces.
Yes, it's exactly the mangling which we can't perform at LTO time and thus
to preserve this extension we'd have to compute DECL_ASSEMBLER_NAME for
all type-decls as well, not just for entities that will have symbols.
