Bug#844403: src:nfft: FTBFS on ppc64el

[Ghislain Vaillant]

On Thu, 24 Nov 2016 18:49:29 -0200 Breno Leitao <brenohl at br.ibm.com> wrote:
> I am looking at this issue, and the first test set is checkall.
>
> If I run it inside dpkg-buildpackage, it fails as in the log, but, if I run
> it isolated, I see no errors, as showed:
>
>   $ ./checkall 2>&1 | grep -i fail
>   $
>
> Looking all tests I see "-> OK". Anyway, I am continue to debug what is the
> problem here.

It could be a lucky shot. Have you tried running them multiple times?

If you look carefully at the log you will find that some tests have an 
unrealistically low tolerance value (in the order of 1E-322), which make 
them succeed when the difference is exactly 0 and fail otherwise.

The other tests have an adequate tolerance value set (1E-16). I don't 
know enough about the codebase to tell you why these tolerances are 
different, but that's probably where the issue is. I would expect all 
tolerances to be in the same order (1E-16).

Cheers,
Ghis