https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95421
--- Comment #1 from Evan Nemerson <e...@coeus-group.com> --- > Several functions are actually present in arm but not aarch64, I'm guessing > that will be an easy place to start. Here is that list: I pasted the wrong list here; that is actually the list of functions which are missing from both arm and aarch64. The attached list is accurate (AFAICT). It looks like the majority of functions missing from aarch64 are present in arm (and vice versa), so hopefully this should be a bit easier to fix than I thought.