Is HDF5 required for NetCDF4, or not?

I do *not* have HDF5 installed on my system, and I see that we append
--disable-netcdf-4
to the configure arguments for netcdf in netcdf.m4 when you don't have HDF5.

And indeed, netCDF's configure script prints:

checking whether we should try to build netCDF-4... no


But in the libmesh config summary I still see:

netcdf........................... : yes
     version....................... : 4

Am I actually getting "netCDF3" functionality (although built with netCDF
4.2.1.1 sources) in this case due to my lack of HDF5?

--
John
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