Re: [HEADS UP] python-matplotlib-2.0.0 major update

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On Mon, 3 Oct 2016 17:25:39 +0200
Dominik 'Rathann' Mierzejewski <dominik@xxxxxxxxxxxxxx> wrote:

> On Monday, 03 October 2016 at 10:43, Dan Horák wrote:
> > On Thu, 22 Sep 2016 18:10:44 +0200
> > Dominik 'Rathann' Mierzejewski <dominik@xxxxxxxxxxxxxx> wrote:
> > 
> > > On Thursday, 22 September 2016 at 16:55, Dan Horák wrote:
> > > > On Thu, 22 Sep 2016 15:41:01 +0200
> > > > Dominik 'Rathann' Mierzejewski <dominik@xxxxxxxxxxxxxx> wrote:
> > > > 
> > > > > Hello,
> > > > > I've just pushed (but not built) python-matplotlib-2.0.0b4 to
> > > > > rawhide. I'll be attempting to rebuild all the affected
> > > > > packages locally to test if they're compatible. In the
> > > > > meantime, feel free to git pull and build locally for your
> > > > > own testing.
> > > > 
> > > > python-matplotlib has been a pain for alternative arches
> > > > recently, due failures in the test-suite (in 1.5.x). Is the 2.0
> > > > version going to be better in this regard?
> > > 
> > > tldr: no, but upstream is aware and working on it.
> > > 
> > > There are quite a few issues opened on upstream github tracker
> > > either by me or by Debian maintainer. The main problem is that
> > > upstream checks that rendering output matches their generated
> > > images. This changes slightly with different versions of
> > > freetype. As a workaround, I reintroduced a certain base
> > > tolerance in order not to add specific tolerance value to each
> > > failing test (there are ~900 failing due to slight rendering
> > > differences). Then, there are some arch-specific issues, mainly
> > > on ARM.
> > 
> > Could we disable the test-suite for alternative arches until there
> > is proper upstream fix? Quite a number of packages/builds are
> > blocked on python-matplotlib currently.
> 
> Which arches are we talking about? s390x, ppc64(le)? Anything else?

plus aarch64, question can be whether to make the list "positive"
%ifnarch arm, x86 then skip test results
or "negative" with %ifarch aarch64  ppc64 s390 ...

> 
> > For math precision issues -ffp-contract=off often helps. And yes,
> > comparing rendered output can be considered fragile, we have already
> > met it ...
> 
> Where does that parameter go?

into CFLAGS, it's for gcc


		Dan
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