Some packages that can use multiple microarchitectures

[giordano]

This is a collection of packages that could take advantage of the multi-microarchitectures support:

• [ ] Darknet
• ~FastTransforms~ it uses CPUID now
• [ ] libfacedetection
• [ ] primecount: at the moment it uses popcount instruction inconditionally, thus making it AVX2-only. PR: #4675
• [ ] pcl
• [ ] finufft: #4669

[ViralBShah]

How about GMP and FFTW? I guess potentially even OpenBLAS could be compiled with microarch support.

[giordano]

Libraries that use CPUID to select code for the target platform don't need this. I think all libraries you mentioned use them

[ViralBShah]

Pretty sure that GMP and FFTW don't do that. But I can always be surprised. FFTW may not need it because it does codegen at runtime though.

[giordano]

FFTW does, according to audit: https://dev.azure.com/JuliaPackaging/Yggdrasil/_build/results?buildId=7971&view=results

[giordano]

First example of package doing multi-microarchitectures build: #4669

[ViralBShah]

zlib-ng

[imciner2]

Also, BLASFEO (currently only generic is packaged, but it has compile-time selection of the architectures).