Bug#942113: 3depict: FTBFS on PPC64EL - POWERPC macro not always defined

[Olly Betts]

On Thu, Oct 17, 2019 at 04:52:58PM +1300, Olly Betts wrote:
> Aha!  wxWidgets "helpfully" defines __POWERPC__ for us on ppc64el, but
> to an empty value.  Then 3depict has a workaround to define it to 1 if
> it is defined, because that empty value breaks Qhull.
> 
> This bug has been open 7 days without a maintainer response now, so
> I'm going to NMU a patch to undefine __POWERPC__ instead, which seems
> a better solution since Qhull won't expect GCC to define it anyway.

That helped, but qhull_a.h is also included elsewhere without this
workaround which caused my upload to FTBFS on ppc64el.  I've extended
the patch to cover that case too and uploaded again.

Cheers,
    Olly