An internal file is a CHARACTER object such as a constant, variable, substring, array or array element, and is most often used for converting between. This internal file exists only whilst the program is executing and behaves like a formatted sequential file. The original files carry Intel's copyright and restrictions on posting. FORTRAN 77 also allows computer memory to be used as if it was an external file. I'd be happy to do so, if I am permitted. The cfortran.h package is available from by anonymous FTP from CERN at the host.
#SIMPLY FORTRAN F77 PATCH#
I submitted a patch at Intel Premier support and Chao there suggested I post here. One very simply creates wrapper macros in C that intercept the C calls FORTRAN or FORTRAN calls C lines of code and correctly handle the translation of all the common data types between the two languages on almost every computer. It should be (and now is) MKL_Comm_f2c(*comm) instead. In rfftwnd_f77_mpi_create_plan(), i.e., for DFTI_REAL, which I used as template for fftwnd_f77_mpi_create_plan(), i.e., for DFTI_COMPLEX, the communicator was hardcoded and passed as MKL_Comm_c2f(MPI_COMM_WORLD).
This is implemented likewise in the FFTW native code, e.g. The array index order for 2d and higher transforms must be reversed for F77 functions to account for array storage order in Fortran.There were two bugs in the wrappers as provided with the MKL:.I did not attempt to account for Fortran name mangling and simply defined *_f77_* with a trailing underscore.I am not sure on scope and portability of MKL_INT vs.The original issue for us was missing F77 functions in nd_create_plan.c.One of my users noticed that the FFTW interface routines for MPI in interfaces/fftw2x_cdft were partially incorrect and were missing some F77 interface functions for Complex transforms, viz.:
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