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Re: [Help-gsl] gsl libraries by Brian Gladman

From: Rhys Ulerich
Subject: Re: [Help-gsl] gsl libraries by Brian Gladman
Date: Fri, 7 Sep 2012 08:11:03 -0500

> There is now only one out of order declaration in the repository code as
> follows:
> ode-initval2\test.c (2185 ...) out of order declarations:
> ------------------------------------  /* Test driver_apply_fixed_step */
>  gsl_odeiv2_driver_reset_hstart (d, 1e-3);
>  const unsigned long int nfsteps = 100000;
>  const double hfixed = 0.000025;
>  s = gsl_odeiv2_driver_apply_fixed_step (d, &t, hfixed, nfsteps, y);
>  if (s != GSL_SUCCESS)
> ------------------------------------

Please consider dropping this into a bug report at

> There are, however, quite a few test errors as follows:
> ...
> I would be most grateful to know which of these are 'work in progress' and
> which are unexpected and might hence be specific to a Visual Studio GSL
> build.

How many of the errors you report persist when you compile in debug
mode (i.e. -O0)?  I am aware of test tolerances being problematic on
Intel compilers at -O2 or -O3.  I suspect Microsoft compilers will
similarly perturb the numerical results when optimization is enabled.
Anything that breaks at -O0 is certainly suspect.

- Rhys

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