https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91239
--- Comment #15 from rguenther at suse dot de <rguenther at suse dot de> --- On Wed, 20 Apr 2022, jakub at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91239 > > --- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- > No, I can't. For one, many targets GCC supports don't support visibility. > And, even for those that do, such a change would be effectively an ABI change, > as mixing *.o files from older gcc version and newer one could result in the > invalid DW_MACRO_import operands if the old version produced comdat wins. To avoid that we'd need to change the mangling of the comdat symbol (add a 'v2' suffix?), so I think it would be feasible. I agree that it's unfortunate to not have a way to collect unused symbols after link editing is done. ELF is lacking there - we get biten by this as well with LTO and hidden symbols used across LTRANS units - they still consume symtab entries after link editing.
