enable netcdf4 only if NetCDF 4.9.0 and later #134
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* NetCDF-4 uses the dimension scale feature which is part of HDF5 high-level APIs, but HDF5 high-level APIs are not well tested for parallel I/O. See Unidata/netcdf-c#2251 and Unidata/netcdf-c#1822 * NetCDF PR #2161 adds a new flag NC_NODIMSCALE_ATTACH to allow users to disable dimension scale, which resolves the problem for e3sm-io. See Unidata/netcdf-c#2161 * NetCDF team indicates PR #2161 will appear in version 4.9.0.
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Instead of requiring NetCDF 4.9.0, a better approach is to check if NC_NODIMSCALE_ATTACH is defined. Close this PR in preference to #136 |
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NC_NODIMSCALE_ATTACH is first defined in NetCDF-C version 4.9.0.
This flag is required to run netcdf4 option. See
Unidata/netcdf-c#2251