Seeing test failures on conda-forge building for ppc64le

[xylar]

version: 1.6.1 environment: Azure pipelines on ppc64le issue is visible here

On conda-forge, we're trying to enable all the netcdf4 tests: https://github.com/conda-forge/netcdf4-feedstock/pull/142

This is working great except for ppc64le. We're wanting some help determining if these should be passing, if we're doing something wrong, or if there are kinks to work out either here or with the c library. See: https://github.com/conda-forge/netcdf4-feedstock/pull/142#issuecomment-1262453148