On Wed, Jun 04, 2008 at 09:39:14AM +0200, Matthias Schroeder wrote: > Konstantin Olchanski wrote: > >On Mon, Jun 02, 2008 at 08:22:24PM +0100, Jon Peatfield wrote: > >>>I installed SL5.1 and seems g77 isn't installed. > > > > > >Yes, in recent GCCs, the very nice g77 compiler was replaced by something > >called gfortran. If I remember right, the main reason was the retirement > >of the g77 main author and maintainer. > > > >The new compiler is written by some new people and it strives to implement > >the recent Fortran standards (F-95, etc). > > > >Last time I looked a few years ago, compatibility with Fortran-II, > >Fortran-4, DEC Fortran, Fortran-77 and need to compile antique (but still > >quite usable) programs was not high in the priority list for gfortran > >developers. > > Proper Fortran-77 is no problem any more with gfortran, but with vendor > specific, non-standard extensions you will have no luck. > "No luck" is too strong a statement. Especially if the non-standard extension was supported by g77, you have a good chance that it will work with gfortran. It is a design goal of the gfortran developpers to provide backwards compatibility with g77. As far as I know, they have achieved that to a large extent. -- Klaus Wacker [log in to unmask] Experimentelle Physik V http://www.physik.uni-dortmund.de/~wacker Universitaet Dortmund Tel.: +49 231 755 3587 D-44221 Dortmund Fax: +49 231 755 4547