https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116246
--- Comment #1 from Sam James <sjames at gcc dot gnu.org> --- We should check if we can use the (extended) malloc attributes as well. I imagine there's a few missing parts for that in libiberty. gnulib does not have these for its obstack but it does for e.g. bitset_obstack_alloc which is based on obstack.
