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bmi-f90

Fortran 90 bindings for the CSDMS Basic Model Interface (BMI).

Build

To build the bindings and tests on Linux and macOS, run

$ mkdir _build && cd _build
$ cmake .. -DCMAKE_INSTALL_PREFIX=<path-to-installation>
$ make

where <path-to-installation> is the base directory where you want to install things (/usr/local is the default).

Install

To install:

$ make install

Test

Run some simple tests with

$ make test

Use

Run the heat model through its BMI with the run_bmiheatf90 program, which takes a model configuration file (see the testing directory for a sample) as a required parameter. If run_bmiheatf90 is in your path, run it with

run_bmiheatf90 test.cfg

Output from the model is written to the file bmiheatf90.out in the current directory.

Note

Why two different Fortran BMIs? Though Fortran 90/95 has the concept of an interface, it doesn't allow procedures to be included within types. This is difficult to reconcile with BMI, which, in Fortran, would ideally be implemented as a collection of procedures in a type. Thus, the Fortran 90/95 BMI is set up as an example that a user can copy and modify, substituting their code for code in the example. This is somewhat cumbersome. The Fortran 2003 BMI implementation acts a true interface--it can be imported as a type from a module into a Fortran program and its methods overridden. The CSDMS IF software engineers recommend using the Fortran 2003 bindings in https://github.com/csdms/bmi-fortran; however, we will continue to support the Fortran 90/95 bindings for users in the CSDMS community who aren't comfortable using the object-oriented features of Fortran 2003. Further, both BMI implementations are backward-compatible with Fortran 77. All that is needed is a compiler that's capable of handling the more recent versions of Fortran; for example gfortran in the GNU Compiler Collection.