Building Your Own Wrapper Library

The MPI FFTW wrappers for FFTW3 are delivered as source code, which can be compiled to build a wrapper library.

The source code for the wrappers, makefiles, and function list files are located in subdirectory .\interfaces fftw3x_cdft in the Intel MKL directory.

To build the wrappers,

Change the current directory to the wrapper directory
Run the make command on Linux* OS or the nmake command on Windows* OS with a required target and optionally several parameters.

The target, that is, one of {libia32, libintel64}, defines the platform architecture, and the other parameters specify the compiler, size of the default INTEGER type, as well as the name and placement of the resulting wrapper library. You can find a detailed and up-to-date description of the parameters in the makefile.

In the following example, the make command is used to build the MPI FFTW wrappers to Intel MKL for use from the GNU C compiler on Linux OS based on Intel® 64 architecture:

cd interfaces/fftw3x_cdft
make libintel64 compiler=gnu mpi=openmpi INSTALL_DIR=/my/path

This command builds the wrapper library using the GNU gcc compiler so that the final user executable can use Open MPI and places the result, named libfftw3x_cdft_DOUBLE.a, into directory /my/path.