Bug#1010595: Please make xsimd available on all platforms

[Julien Lamy]

Hi Ole,
I've looked at the code of xsimd 8, and it seems that the fallback has 
been replaced by another mechanism; however my tests on a mipsel 
porterbox fail to compile simple programs. I've taken the issue upstream 
(https://github.com/xtensor-stack/xsimd/issues/756) to see what is the 
status of the fallback mechanism.

Cheers,
-- 
Julien

Le 05/05/2022 à 09:58, Ole Streicher a écrit :
> Source: xsimd
> Version: 7.6.0-2
> Control: affects -1 src:pythran src:skimage
> Control: block 1009431 by -1
> Control: block 1010430 by -1
> 
> Dear maintainer,
> 
> xsimd provides a unique API for SIMD instructions among different 
> processor architectures. Additionally to many specific architectures, 
> there is also a fallback scalar option for unsupported architectures (as 
> far as I interpret the headers).
> 
> Currently, xsimd-dev fails to build on armel, armhf, mips64el, mipsel, 
> ppc64el, s390x (armhf is built with 8.0.3-1 on experimental).
> 
> xsimd-dev is build dependency of pythran, which makes pythran 
> uninstallable on the platforms where xsimd-dev fails.
> 
> In turn, python3-pythran is a new build dependency of skimage (0.19.2). 
> The current version of skimage (0.18.3) is now starting to collect RC 
> bugs because of incompatibilities with newer pil and tifffile versions 
> (#1009431, #1010430).
> 
> skimage is also one of the basic scientific Python packages which is 
> expected to be available on all platforms.
> 
> Therefore, could I ask to provide xsimd-dev for all platforms, using the 
> scalar fallback for unsupported CPUs?
> 
> Best regards
> 
> Ole
> 
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