 The Fortran front end was codice_8 before version 4.0, which only supports FORTRAN 77.In newer versions, codice_8 is dropped in favor of the new GNU Fortran front end (retaining most of g77's language extensions) that supports Fortran 95 and large parts of Fortran 2003 and Fortran 2008 as well.A front-end for CHILL was dropped due to a lack of maintenance.