Re: Problems with the giac package : different failures on buildd and porterbox !?

On 2020-01-23 07:52, Julien Puydt wrote:
> Le mercredi 22 janvier 2020 à 21:29 +0100, Julien Puydt a écrit :
> 
> > I wanted to work on it and get meaningful data for upstream, so
> > turned
> > to zelenka, the porterbox for this architecture. I followed the
> > tutorial here https://dsa.debian.org/doc/schroot/ - as I'm already
> > used
> > to do when I get problems with other packages. But this time, the
> > documentation step already fails :
> >   ***   bug in PARI/GP (Segmentation Fault), please report.
> > (repeated quite a few times before the compilation dies)
> > 

s390x is a big-endian architecture. The build failure on ppc64 and
sparc64 are really similar, so I believe the issue is related to
endianness.

> The compiled calculator gives strange results:
> 0>> 1/2.0-1/3
> 5.46834151467e-304
> // Time 0
> 1>> 1/2.0
> 3.64556100978e-304
> // Time 0
> 2>> 1/3
> 1/3
> // Time 0
> 3>> 1/1.
> 3.64556100978e-304
> // Time 0
> 4>> 1.
> 3.64556100978e-304
> // Time 0
> 
> The last example shows that it's not just a computation problem.

That behaviour clearly shows that what is displayed is not the result of
the computation.

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
[email protected]                 http://www.aurel32.net