problems with g77

[Toon Moene]

"sreenath.ramaswamy" wrote:

>         We are facing a problem with running a quantum chemical
> computation package called GAMESS compiled using g77 on 64 bit LInux on
> IA64. The software terminates abnormally saying "out of range values"
> seemingly with double precision data. Could anyone please help with the
> answers to the following questions which I think will help us fix the
> problem??

Which version of the compiler, the glibc library and the Linux kernel
are you using ?

>         1) Is the g77 port to 64 bit LInux bug free especially with
>                 double precision data type??

Well, no software project the size of a compiler can ever be proclaimed
"bug free", so we aren't claiming that ...

>         2) Which are the kind of programming constructs which we should be
>                 looking for in the code(I am new to Fortran) that could
>                 exhibit machine dependent behaviour??

I've never used the GAMESS package, but Fortran code in general is not
"machine dependent".  It could be that some Fortran construct happens to
trigger a bug in the compiler, but we cannot debug these cases without
having the exact source code showing the problem.

>         All help in the form of answers to these queries and anything more
> which could go a long way towards solving the problem will be highly
> appreciated.

Well, I'm sorry to have only added to the questions ...

Cheers,

-- 
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