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 switch to the directory generated after the package is decompressed:
```
cd fftw-3.3.8
```
Run the following command to run the bootstrap.sh script:
```
./bootstrap.sh
```

Run the following command to perform configuration:

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

Run the following commands to perform compilation and installation:
```
make -j40
make install
```

Run the following commands to set FFTW environment variables:

export PATH=/path/to/FFTW/bin:$PATH
export LD_LIBRARY_PATH=/path/to/FFTW/lib:$LD_LIBRARY_PATH

Parent topic: Configuring the Compilation Environment