HPC/Applications/fftw3

Linking FFTW3

Load the module in your .bashrc or simply on the command line.

Then, to link, you typically need to pass to make(1) or configure where to find include and library files.

In the simplest case, simply pass on the command line 3 items:

1. path to include files -Ipath,
2. path to library files -Lpath,
3. the actual link request -llibname. (lowercase L)

For example, for a standalone C program:

icc … your obj files and flags … -I$FFTW3_HOME/include -L$FFTW3_HOME/lib -lfftw3

For MPI, simply replace icc by mpicc.

Sometimes application makefiles use variables to handle the paths, e.g. for LAMMPS, the following is needed:

make … \
       FFT_PATH="-L$FFTW3_HOME/lib" \
       FFT_LIB="-lfftw3" \
       …