This is a project compiles FFTW3 source code not it's library with user code. Thus, it's convenient to port it between different OS. How to use: $ tar xzf fftw-3.3.8.tar.gz $ cp -r fftw-src-compile/* fftw-3.3.8 $ cd fftw-3.3.8 $ vim userapp/main.c # edit your code $ make