Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

Building an Application With FFTW3 Interface Wrappers

Normally, the only change needed to build your application with FFTW3 wrappers replacing original FFTW library is to add
Intel® oneAPI Math Kernel Library
 at the link stage (see section
"Linking Your Application with
Intel® oneAPI
 Math Kernel Library
" in the
Intel® oneAPI Math Kernel Library
 Developer Guide
).
If you recompile your application, add subdirectory
include\fftw
 to the search path for header files to avoid FFTW3 version conflicts.
Sometimes, you may have to modify your application according to the following recommendations:
  • The application requires
    #include "fftw3.h"
     ,
    which it probably already includes.
  • The application does not require
    #include "mkl_dfti.h" .
  • The application does not require
    #include "fftw3_mkl.h"
     .
    It is required only in case you want to use the
    MKL_RODFT00
     constant.
  • If the application does not check whether a
    NULL
    plan is returned by plan creation functions, this check must be added, because the FFTW3 to
    Intel® oneAPI Math Kernel Library
     wrappers do not provide 100% of FFTW3 functionality.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.