[SciPy-Dev] PR for bounded linear least squares

[Charles R Harris]

On Tue, Mar 18, 2014 at 3:25 AM, Sturla Molden <sturla.molden at gmail.com>wrote:

> Skipper Seabold <jsseabold at gmail.com> wrote:
>
> > I guess I have a question. Does anyone have an option on the best way
> > forward for the Fortran 90 code? We have to stick to Fortran 77 code,
> > unfortunately, so my options are to either fix the code incrementally
> > for F77 or ... ?
>
> It is basically undoable. Do you know Fortran 77 that well?
>
> I learned Fortran 90 about 20 years ago. I couldn't write valid Fortran 77
> even if I wanted to -- even though I am fluent in Fortran 90. And that is
> probably the case for most scientists that use Fortran today.
>
> If you tried, you would even have to change loops into gotos. Good luck on
> that...
>
> Coding Fortran 77 in 2014 is not worth the effort.
>
>
> > What do people think about using f2c to generate and
> > include C code? I've never done this before, and I assume it comes
> > with its own can of worms.
>
> This will not help you out.
>
> f2c is a Fortran 77 compiler.
>
> f2c and g77 was written by the same person (as one-man projects), and they
> basically do the same except for what they emit (C or machine code,
> respectively). The original f77 compiler was a shell script that invoked
> f2c and system cc. g77 came along because pointer aliasing prevented C
> compilers from doing certain optimizations (e.g. register allocation). With
> a modern C compiler it is probably better to use f2c than the g77 compiler,
> but it will still be inferior to modern Fortran compilers (gfortran, ifort,
> absoft).
>
>
Wasn't there a Cython project for wrapping Fortran? IIRC, it had the
opposite problem, it could wrap newer versions of Fortran but couldn't hack
Fortran 77.

Chuck
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/scipy-dev/attachments/20140318/dfc544bf/attachment.html>