[Python-modules-team] Bug#915738: python-scipy should use the default gfortran on s390x

[Aurelien Jarno]

On 2018-12-22 15:02, Mattia Rizzolo wrote:
> On Thu, Dec 06, 2018 at 03:21:29PM +0100, Matthias Klose wrote:
> > Please use the default GCC for the package so that we can remove GCC 7 for the
> > buster release.
> 
> Befpre anybody starts dumbingly removing that build-dep, please be aware
> that it was done due to #906198, e.g. some kind of miscompilation with
> gcc-8 on s390x only.
> 
> TTBOMK the actual bug has not been debugged by anybody yet.

The bug seems to be a miscompilation of scipy/optimize/minpack/qrsolv.f
with -funroll-loops. Removing -funroll-loops is enough to get the
leastsq testcase to pass. Now I am not used to fortran code, so I don't
know how to move that forward.

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien at aurel32.net                 http://www.aurel32.net
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/python-modules-team/attachments/20181229/e1fb0f91/attachment.sig>