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Chris@82:This chapter describes the interface to FFTW callable by Fortran code Chris@82: in older compilers not supporting the Fortran 2003 C interoperability Chris@82: features (see Calling FFTW from Modern Fortran). This interface Chris@82: has the major disadvantage that it is not type-checked, so if you Chris@82: mistake the argument types or ordering then your program will not have Chris@82: any compiler errors, and will likely crash at runtime. So, greater Chris@82: care is needed. Also, technically interfacing older Fortran versions Chris@82: to C is nonstandard, but in practice we have found that the techniques Chris@82: used in this chapter have worked with all known Fortran compilers for Chris@82: many years. Chris@82:
Chris@82:The legacy Fortran interface differs from the C interface only in the
Chris@82: prefix (‘dfftw_’ instead of ‘fftw_’ in double precision) and
Chris@82: a few other minor details. This Fortran interface is included in the
Chris@82: FFTW libraries by default, unless a Fortran compiler isn’t found on
Chris@82: your system or --disable-fortran is included in the
Chris@82: configure flags. We assume here that the reader is already
Chris@82: familiar with the usage of FFTW in C, as described elsewhere in this
Chris@82: manual.
Chris@82:
The MPI parallel interface to FFTW is not currently available Chris@82: to legacy Fortran. Chris@82:
Chris@82:| • Fortran-interface routines: | Chris@82: | |
| • FFTW Constants in Fortran: | Chris@82: | |
| • FFTW Execution in Fortran: | Chris@82: | |
| • Fortran Examples: | Chris@82: | |
| • Wisdom of Fortran?: | Chris@82: |
Chris@82: Next: Upgrading from FFTW version 2, Previous: Calling FFTW from Modern Fortran, Up: Top [Contents][Index]
Chris@82: