On Sun, 27 Oct 2013, Matthew Knepley wrote: > On Sun, Oct 27, 2013 at 6:16 AM, Hossein Talebi > <talebi.hoss...@gmail.com>wrote: > > > Hello All, > > > > I am trying to use petsc with Fortran. The initial mechanism to use petsc > > with FORTRAN77 that works fine. However, I found the Fortran 90 interfaces > > difficult to work with. The very first issue is one has to recompile petsc > > with the Fortran compiler in case different to the one which was used to > > create the Fortran Mod files.
Yes - one cannot mix fortran code compiled with 2 different compilers - or 2 different version of the same compiler wrt modules. But we generally recommend not mixing compilers for C aswell as this can cause problems. Also you don't need to use modules to get f90 interfaces. You can include the f90 interface include files directly in your code. #incude "finclude/petsc.h90" > > Also, we would still need to use C type > > #include statements along with Fortran 'use' statement which is not so > > optimal. Even if you were to use f90 modules #include is unavoidable as we still have other stuff in include files. check include/finclude/petscsysdef.h include/finclude/petscsys.h > > Since Fortran 2003 offers great interface to C, did anyone try to write a > > F03 interface to petsc? Using F03 features, we can have very low data > > access to petsc database as well. > > > > F2003 support is fairly thin in the compiler world, and we have not had > much call for it. We do gratefully accept contributions. Currently we have the f90 interfaces [in include/finclude/ftn-auto/] automatically generated by bfort tool from the C interface. So to support F03 it would be ideal if there is such a tool. [or update bfort to do it] Satish