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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