Installing FFTW

Procedure

1. Use PuTTY to log in to the server as the root user.
2. Decompress the FFTW installation package.

   tar -xvf fftw-3.3.8.tar.gz

3. Go to the directory generated after the decompression.

   cd fftw-3.3.8

4. Perform the configuration. Add an absolute path if an error is reported.

   export CC=`which clang`
   export CXX=`which clang++`
   export FC=`which flang`

5. Execute the bootstrap.sh script.

   ./bootstrap.sh

6. Perform the configuration.

   ./configure --prefix=/path/to/FFTW --enable-threads --enable-float

7. Perform the compilation and installation.

   make
   make install

8. Load the environment variables.

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