Files downloaded from mexcdf.sourceforge.net:

mexnc-a64-2.0.25.tar.gz
netcdf_toolbox-1.0.12.tar.gz
snctools-2.3.12.tar.gz

Note:  mexnc is optimized for the AMD chipset not the Intel EM64T.

The current mexnc directory is derived from mexnc-a64-2.0.25.tar.gz.