Disabling of OpenCL by default in Calc

[Stephan Bergmann]

On 06/21/2016 02:51 AM, Markus Mohrhard wrote:
> so I'd like to disable OpenCL by default in Calc. I was once again hit
> by some nasty issue in the OpenCL code that makes calc unusable for me.
> In my opinion we have way too many issues with it and it reduces the
> reliability of Calc ( who trusts his OpenCL driver enough to do his
> taxes with OpenCL enabled).
>
> Unless someone does some huge refactoring of the OpenCL code and makes
> sure that we can trust the OpenCL backend as much as our normal formula
> code I would prefer if we disable it. In this case it is a regression
> from 40b0b9ab7703a165295b008f47df14d2ec076fb1 but that we don't detect
> such fundamental problems because of the different engines and the
> different devices makes it hard to rely on the OpenCL code.

Can you give a short description of what the problem actually is?

[...]
> It would be nice if this could be put onto the ESC agenda so that we
> could disable it in 5.2.