Installing PnetCDF

Procedure

Use PuTTY to log in to the server as the root user.
Run the following command to decompress the PnetCDF installation package:
```
tar -xvf parallel-netcdf-1.9.0.tar.bz2
```
Run the following command to switch to the directory generated after the package is decompressed:
```
cd parallel-netcdf-1.9.0
```
Run the following commands to configure the environment before compilation:
```
export MPICC=mpicc
export MPICXX=mpicxx
export MPIFC=mpifort
```

Run the following command to perform configuration:

./configure --prefix=/path/to/PNETCDF --build=aarch64-unknown-linux-gnu CFLAGS="-fPIC -DPIC" CXXFLAGS="-fPIC -DPIC" FCFLAGS="-fPIC" FFLAGS="-fPIC"  CC=$MPICC CXX=$MPICXX FC=$MPIFC F77=$MPIFC

Run the following commands to perform compilation and installation:
```
make -j 16
make install
```

Parent topic: Configuring the Compilation Environment