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All programs using FFTW's MPI support should include its header file: Chris@10: Chris@10:
#include <fftw3-mpi.h> Chris@10:Chris@10:
Note that this header file includes the serial-FFTW fftw3.h
Chris@10: header file, and also the mpi.h header file for MPI, so you
Chris@10: need not include those files separately.
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You must also link to both the FFTW MPI library and to the
Chris@10: serial FFTW library. On Unix, this means adding -lfftw3_mpi
Chris@10: -lfftw3 -lm at the end of the link command.
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Different precisions are handled as in the serial interface:
Chris@10: See Precision. That is, ‘fftw_’ functions become
Chris@10: fftwf_ (in single precision) etcetera, and the libraries become
Chris@10: -lfftw3f_mpi -lfftw3f -lm etcetera on Unix. Long-double
Chris@10: precision is supported in MPI, but quad precision (‘fftwq_’) is
Chris@10: not due to the lack of MPI support for this type.
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