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Easy dynamic dispatch using GLIBC Hardware Capabilities
TL;DR With GLIBC 2.33+, you can build a shared library multiple times targeting various optimization levels, and the dynamic linker/loader will pick the highest version supported by the current CPU. F
TL;DR With GLIBC 2.33+, you can build a shared library multiple times targeting various optimization levels, and the dynamic linker/loader will pick the highest version supported by the current CPU. A performant yet universally loadable library needs to make use of some form of dynamic dispatch to leverage the most effective SIMD extensions available on any given CPU it may run on. This has the nice property that on systems not using GLIBC, and thus not having hwcaps available, package installation will still result in a loadable library, albeit the version with the worst performance.
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