Re: [Patch, Ada, Darwin] Restore PowerPC Darwin Ada bootstrap (after a looong time, it seems).

[Iain Sandoe <developer at sandoe-acoustics dot co dot uk>]

Hello Eric,

On 6 Sep 2011, at 08:41, Eric Botcazou wrote:

> >    - it doesn't seem reasonable to force -fexceptions - until we can
> > build ada with ZCE.
>
> Or change the SJLJ scheme.

Hm. I'm probably being a bit dumb here - but not clear about which  
scheme/where in the code-base you have in mind.

(I get the point about the SjLj scheme used by Ada being different).

> >  ... would there be some more appropriate test for rs6000.c to use?
>
> Possibly, what's the exact reason why the special routines cannot be  
> used?

That's a good question, and one that I haven't got to the bottom of -  
but the exclusion was there in the original code-base [still in the  
vendor's tree too].
(also, the rs6000 pro/epilogue code is not the easiest to navigate).

> > 3. There is no multi-lib target set for powerpc64-darwin, thus
> > bootstrap fails with a Bad Alignment error in building the target  
> > libs.
> >
> > Since this is a long-standing regression (last bootstrap for powerpc-
> > darwin was likely in the 4.2 era).
> >
> > OK for 4.6 (1, 3) and trunk (1,2 & 3) ?
>
> Be careful about system-darwin-ppc64.ads: I don't think you can  
> backport an
> instance from the trunk to the 4.6 branch, as there is at least one  
> entry
> missing at the end.

Yes, I have a different version for 4.6 with the recently deleted  
entries still intact (and, of course, it has been tested).

cheers
Iain