[Developers] F77 versus F90 compiler
steve.white at aei.mpg.de
Fri Nov 4 12:44:03 CST 2005
OK, so I made a darwin8.2.0 known-architectures file,
and now I guess your patch is working.
There are some other errors though. I'll work those out and submit
a separate patch.
I'm not clear though on: will this help the problems on Psi?
On 4.11.05, Erik Schnetter wrote:
> On Nov 3, 2005, at 07:49:36, Erik Schnetter wrote:
> >On Nov 3, 2005, at 06:09:45, Tom Goodale wrote:
> >>On Mon, 31 Oct 2005, Erik Schnetter wrote:
> >>>In the past, there was virtually no free format Fortran code in
> >>>Cactus. The problem went unnoticed, but Cactus could not
> >>>actually handle free format
> >>That's not true. If you look at the AIX and BlueGene known-
> >>architecture file you will see the way around this problem.
> >Thanks for the pointer. That code is... clever. Indeed, the same
> >code is already in the darwin configuration file. I missed the
> >point that make evaluates variables and expressions dynamically,
> >making the wrapper script superfluous.
> >I'll continue from there.
> I think I found the problem.
> Cactus adds, at run time, some magic to F90FLAGS to make the compiler
> accept both fixed and free form source code. This magic is added to
> F90FLAGS, but not to F77FLAGS. F77FLAGS are set up at configuration
> time so that the compiler accepts fixed form source code.
> When we copy F90FLAGS to F77FLAGS, things break. Cactus has to add
> its magic also to F77FLAGS. The enclosed patch (untested) does that
> for the Darwin architecture. It also sets F77FLAGS and F90FLAGS to
> the same value initially. Can you test the patch?
> Previous statements about this being an F90 (and not F77) problem, or
> this having to do with whether the user specifies F90FLAGS or not,
> were incorrect.
> Erik Schnetter <schnetter at cct.lsu.edu>
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Steve White : Programmer
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