> Am 14.11.2017 um 12:00 schrieb [hidden email]:
> Date: Sun, 12 Nov 2017 08:56:49 -0500
> From: brian <[hidden email]>
> To: FPC-Pascal users discussions <[hidden email]>
> Subject: [fpc-pascal] FORTRAN from FreePascal
> <[hidden email]>
> Content-Type: text/plain; charset=utf-8
> I need to try to put a user-friendly GUI and some graphical output
> onto an old command-line FORTRAN number cruncher, and have been
> provided with around 130 KB of FORTRAN source code. A quick scan of
> documentation seems to suggest that this is possible using gfortran
> and the C calling conventions (if someone knows differently, please
> say so right now!) :)
> My knowledge of FORTRAN-77 is sound, if rather rusty, but I know
> almost nothing about C programming, having been brought up as a
> chemist before I was dragged across to programming (I learned to
> program on Algol-60, BASIC and FORTRAN-IV, yes, that long ago ): ).
> Anyone with any past experience here? It seems I have two choices, to
> try to call the FORTRAN subroutines from FreePascal or to port the
> FORTRAN code to Pascal, I'm looking for advice...
What you are describing is also part of my activities. Most of the details have already been mentioned by Adrian and others. Only one more thing: The Fortran code will probably be compiled with 64 bit, so use fpc 64 bit.