Dear MPI-Forum members, MPI-3.1 and MPI-4.0 includes the following rule on top of the 2nd page of the Language Binding chapter:
| MPI implementations providing a Fortran interface must provide | one or both of the following: | - The USE mpi_f08 Fortran support method. | - The USE mpi and INCLUDE 'mpif.h' Fortran support methods. The embiggening was included only in the C and mpi_f08 bindings. Most implementors nowadays provide all three MPI Fortran support methods, i.e., the mpi_f08 and the mpi module and mpif.h. For all MPI-3.1 libraries that provide all three MPI Fortran support methods, the most easiest and fastest way to provide MPI-4.0 for C and Fortran is, - to implement the embiggening for C, - and to remove the mpi_f08 module, - and maybe months or years later, to provide mpi_f08 again, now embiggened. This implementation path (by removing mpi_f08 from MPI-3.1 and to name it MPI-4.0 without Fortran embiggening) was of course never intended, when we decided to require the embiggened routines only for mpi_f08. The goal was - to not require additional work from the implementors for the old mpi module - convince the users that it is a good idea to make a transition to mpi_f08. The most simplest way to resolve this problem would be to require mpi_f08 for MPI-4.0, i.e., to change the text to | MPI implementations providing a Fortran interface | - must provide the USE mpi_f08 Fortran support method, | - and additionally may provide both, | the USE mpi and INCLUDE 'mpif.h' Fortran support methods. What is your opinion? I expect that we should discuss this next Wednesday at our MPI Forum telcon. Best regards Rolf -- Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseif...@hlrs.de . High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 . University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 . Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner . Nobelstr. 19, D-70550 Stuttgart, Germany . . . . (Office: Room 1.307) . _______________________________________________ mpi-forum mailing list mpi-forum@lists.mpi-forum.org https://lists.mpi-forum.org/mailman/listinfo/mpi-forum
