Addendum to ',X' bug

[Tobias.Schlueter@Physik.Uni-Muenchen.DE]

Quoting Joseph Comfort <Joseph.Comfort@asu.edu>:
> I have a collection of old nuclear physics programs, from the 70's and
> 80's, and am checking them out.  They were coded mostly in Fortran IV,
> with small changes later for IBM, VAX, and g77.  Apart from the 'nX'
> bug, they all compile and run fine on i586 and x86_64 machines.  There
> are some small numerical differences between the results from g77 and
> gfortran, espeically in how numbers are rounded on the outputs.  The

Thanks for doing this.

> main 'problem' I see now is that compilation and execution times are
> larger by as much as 50% or factors of 2-3 (all with -O2 optimization).

If you could isolate small testcases or determine where the losses lie, we would
be very interersted in knowing more about these.  We hope that gfortran will
soon be able to replace g77 (die g77, die!), and performance problems are
definitely something that will hinder the transition from g77 to gfortran.

> The same story also holds for the alternative g95 compiler, except that
> it has a couple of small (and known) bugs for x86_64 systems.

Does it have public bugtracking nowadays?

- Tobi