[Numpy-discussion] Warning on http://scipy.org/ about binary incompatibility ?
Thu Jan 28 09:08:23 CST 2010
On Thu, Jan 28, 2010 at 9:09 AM, Dag Sverre Seljebotn
> email@example.com wrote:
>> On Thu, Jan 28, 2010 at 1:39 AM, David Cournapeau <firstname.lastname@example.org> wrote:
>>> Charles R Harris wrote:
>>>> On Wed, Jan 27, 2010 at 6:20 PM, David Cournapeau <email@example.com
>>>> <mailto:firstname.lastname@example.org>> wrote:
>>>> email@example.com <mailto:firstname.lastname@example.org> wrote:
>>>> > Can we/someone add a warning on the front page http://scipy.org/
>>>> > (maybe under news for numpy download) about incompatibility of the
>>>> > binaries on sourceforge of scipy <=0.7.1 with numpy 1.4.0 ?
>>>> It seems that it will be quite difficult to fix the issue without
>>>> removing something (I tried to use datetime as user types, but this
>>>> opened a can of worms), so I am (quite reluctantly ) coming to the
>>>> conclusion we should just bite the bullet and change the ABI number (so
>>>> that importing anything will fail instead of crashing randomly).
>>>> Something like numpy 126.96.36.199, which would just have a different ABI
>>>> number than 1.4.0, without anything else.
>>>> Why do you think it would be better to make this change in 1.4 rather
>>>> than 1.5?
>>> Because then any extension fails to import with a clear message instead
>>> of crashing as it does now. It does not matter much if you know the
>>> crash is coming from an incompatible ABI, but it does if you don't :)
>> I thought we could get away with a small binary incompatibility,
>> without rebuilding everything. I'm using matplotlib although not
>> extensively and it didn't crash in a while. (I don't remember which
>> version of scipy I used for the last time when I had a crashing
> This made my hairs stand up on my back...
Maybe this wasn't well phrased, with "we" I meant users like myself,
and for example not the numpy developers.
I'm strongly in favor of warnings, but not of enforced not running at all.
For example I don't know whether h5py would work with numpy 1.4 if
cython (I think) wouldn't prevent me from importing it.
If I had the option I would stick with numpy 1.3 until the mess is
cleared up and other packages are available in xxx-numpy1.4.x
> Even if you check the "widely used" extensions for usecases which are
> affected by the breakage, you'll never get to check all custom
> propriotary C code around using NumPy, and their authors might easily
> miss this thread.
> In face of this, I actually think the current behaviour of Cython is a
> lucky accident, as all Cython code refuse to run with upgraded NumPy
> without being recompiled :-)
> (Only joking though; the next version of Cython will work across ABI
> Dag Sverre
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