Bug#810913: mesa: Enable OpenCL on ppc64el

["Timothy Pearson" <kb9vqf@pearsoncomputing.net>]

> As I understand your first mail in this report, this requires a fix
> somewhere first?  (I wouldn't want to apply a "temporary" patch in
> Debian.)

Unfortunately it doesn't look like upstream is going to patch their code. 
There is a protracted "blame game" going on between mesa and gcc:
https://bugs.freedesktop.org/show_bug.cgi?id=93687
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58241

Master Khronos bug report (unfortunately largely ignored):
https://www.khronos.org/bugzilla/show_bug.cgi?id=1449

I suspect this won't be dealt with unless downstream distributions patch
the codebase themselves.

Thanks!