https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83387
--- Comment #14 from Sebastian Huber <sebastian.hu...@embedded-brains.de> ---
(In reply to Peter Bergner from comment #13)
> (In reply to Sebastian Huber from comment #12)
> > (In reply to Peter Bergner from comment #9)
> > [...]
> > > Here, you can see that on ELFv2, we always assume HW FP regs are
> > > avialable,
> > > because we're forcing usage of HW FP registers (FP_ARG_RETURN, ie, f1, aka
> > > reg 33). I'm afraid that are going to be a *LOT* of these assumptions
> > > builtin into the backend and tracking them all down and fixing them is not
> > > going to be easy. That's why I asked earlier, if you really really need
> > > to
> > > disable HW FP for your builds. If you do, then good luck to you finding
> > > them all.
> >
> > Thanks for your investigations. I removed the 64-bit soft-float multilib.
>
> I can't promise this is all you need, but does the following patch help?
>
> Index: gcc/config/rs6000/rs6000.c
> ===================================================================
> --- gcc/config/rs6000/rs6000.c (revision 255700)
> +++ gcc/config/rs6000/rs6000.c (working copy)
> @@ -11095,7 +11095,8 @@ rs6000_discover_homogeneous_aggregate (m
> homogeneous aggregates; these types are handled via the
> targetm.calls.split_complex_arg mechanism. Complex types
> can be elements of homogeneous aggregates, however. */
> - if (DEFAULT_ABI == ABI_ELFv2 && type && AGGREGATE_TYPE_P (type))
> + if (TARGET_HARD_FLOAT && DEFAULT_ABI == ABI_ELFv2 && type
> + && AGGREGATE_TYPE_P (type))
> {
> machine_mode field_mode = VOIDmode;
> int field_count = rs6000_aggregate_candidate (type, &field_mode);
>
>
>
With this patch I can build an Ada compiler with a -m64 and -msoft-float
multilib.
