Intel® Math Kernel Library 2019 Developer Reference - C

Installing FFTW2 Interface Wrappers

Wrappers are delivered as source code, which you must compile to build the wrapper library. Then you can substitute the wrapper and Intel MKL libraries for the FFTW library. The source code for the wrappers, makefiles, and files with lists of wrappers are located in the .\interfaces\fftw2xc subdirectory in the Intel MKL directory.