[Pkg-octave-devel] Bug#874116: Bug#874116: Bug#874116: Bug#874116: octave-tisean FTBFS on !amd64: test failure

[Adrian Bunk]

On Sun, Sep 03, 2017 at 08:36:01PM +0200, Rafael Laboissière wrote:
> * Adrian Bunk <bunk at debian.org> [2017-09-03 19:01]:
> 
> > On Sun, Sep 03, 2017 at 05:52:26PM +0200, Rafael Laboissière wrote:
> > 
> > > It seems that many of the unit test failures happen when the
> > > function henon is involved.  This function computes the Henon map
> > > with a default transient initial period of 10000 samples.  The
> > > computation in the henon function is iterative and my guess is that
> > > the results are sensitive to the architecture-specific floating
> > > point representation.  Would -ffloat-store help here?
> > 
> > -ffloat-store sometimes matters on i386, but on most architectures it is
> > a complete nop.
> 
> Thanks for your quick reply.  Are there other sources of differences in the
> representation of float numbers across the architectures, that might explain
> the different results in the henon function?

Sorry, I don't have any immediate ideas on that
(and no time to debug it properly).

> Rafael

cu
Adrian

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