Tests fail on ppc64le

[bkmgit]

https://koji.fedoraproject.org/koji/taskinfo?taskID=137850982
https://kojipkgs.fedoraproject.org//work/tasks/982/137850982/build.log

[insertinterestingnamehere]

We're likely going drop support for ppc soon anyway. Are you okay not including that arch for your use-case?

[insertinterestingnamehere]

I think there is also already a workaround for this in #355. The fast context swap is broken on that platform so we allow it to fall back to the slower system context swap instead. Adding -DQTHREADS_CONTEXT_SWAP_IMPL=system to the CMake configure command will fix it, but only do that on ppc64le because it will degrade performance on platforms where the context swap works correctly. This fallback behavior on ppc64le is the default in the development version of qthreads, but not in the last release.

[bkmgit]

Thanks, that built:
https://koji.fedoraproject.org/koji/taskinfo?taskID=137906275

[insertinterestingnamehere]

Excellent. Thanks! That's great to hear!