Installing FFTW

Use PuTTY to log in to the server as the root user.
Run the following command to decompress the FFTW installation package:
```
tar -xvf fftw-3.3.8.tar.gz
```
Run the following command to go to the directory generated after decompression:
```
cd fftw-3.3.8
```

Run the following command to perform the configuration:

./configure --prefix=/path/to/FFTW --enable-shared --enable-static --enable-fma --enable-neon

Run the following commands to perform the compilation and installation:
```
make -j 128
make install
```
Run the following command to configure the FFTW environment variables required for installing the main program:
```
export CPATH=/path/to/FFTW/include:$CPATH
```

Parent topic: Configuring the Compilation Environment