stuartarchibald

> CI failure is not related to this PR. Failed test was: `ERROR: test_np_MachAr_deprecation_np122 (numba.tests.test_np_functions.TestNPMachineParameters)`. It indeed seems unrelated.

Buildfarm ID: `numba_smoketest_cuda_yaml_149`.

> Buildfarm ID: `numba_smoketest_cuda_yaml_149`. Passed.

> > I wonder if at compile time the OpenMP version could be detected and added to the current 2 vs 3+ split implied by _MSC_VER, this to accommodate e.g....

Buildfarm ID: `numba_smoketest_cpu_yaml_70`. This should highlight any immediate issues ahead of reviewing the patch.

> Buildfarm ID: `numba_smoketest_cpu_yaml_70`. This should highlight any immediate issues ahead of reviewing the patch. This is failing on ppc64le, at test: `numba.tests.test_num_threads.TestNumThreadsBackends.test_nested_parallelism_3_omp_4` (this test is auto generated) with: ```...

The failure reported in https://github.com/numba/numba/pull/7705#issuecomment-1018482015 appears to be consistent, a rerun of the test suite hits it again. It also appears on all configurations for ppc64le i.e. it's independent of...

With view of getting this PR merged, perhaps the `ppc64le` target can continue using `omp_set_nested` (along with windows), and a ticket is opened to record the issue and require investigation...

> > What do you think @gmarkall ? > > That sounds good to me. I'll update this PR to do as suggested. Great, thanks!

https://github.com/numba/numba/issues/7981 is a record of the issue with ppc64le.