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Chris@42:This chapter describes the interface to FFTW callable by Fortran code Chris@42: in older compilers not supporting the Fortran 2003 C interoperability Chris@42: features (see Calling FFTW from Modern Fortran). This interface Chris@42: has the major disadvantage that it is not type-checked, so if you Chris@42: mistake the argument types or ordering then your program will not have Chris@42: any compiler errors, and will likely crash at runtime. So, greater Chris@42: care is needed. Also, technically interfacing older Fortran versions Chris@42: to C is nonstandard, but in practice we have found that the techniques Chris@42: used in this chapter have worked with all known Fortran compilers for Chris@42: many years. Chris@42:
Chris@42:The legacy Fortran interface differs from the C interface only in the
Chris@42: prefix (‘dfftw_’ instead of ‘fftw_’ in double precision) and
Chris@42: a few other minor details. This Fortran interface is included in the
Chris@42: FFTW libraries by default, unless a Fortran compiler isn’t found on
Chris@42: your system or --disable-fortran is included in the
Chris@42: configure flags. We assume here that the reader is already
Chris@42: familiar with the usage of FFTW in C, as described elsewhere in this
Chris@42: manual.
Chris@42:
The MPI parallel interface to FFTW is not currently available Chris@42: to legacy Fortran. Chris@42:
Chris@42:| • Fortran-interface routines: | Chris@42: | |
| • FFTW Constants in Fortran: | Chris@42: | |
| • FFTW Execution in Fortran: | Chris@42: | |
| • Fortran Examples: | Chris@42: | |
| • Wisdom of Fortran?: | Chris@42: |
Chris@42: Next: Upgrading from FFTW version 2, Previous: Calling FFTW from Modern Fortran, Up: Top [Contents][Index]
Chris@42: