This git repository does not contain the FFTW package. It is recommended that you download the full working packages
for windows and linux from http://wavelet2d.sourceforge.net and https://sourceforge.net/projects/wavelet2d/files/. 
Alternatively, you can clone this git repository and build the FFTW package on yout computer. See documentation at 
https://sourceforge.net/projects/wavelet2d/files/