On Tue, Jan 2, 2024 at 1:20 PM Vít Ondruch <vondruch@xxxxxxxxxx> wrote:
>
>
> Dne 28. 12. 23 v 17:12 Aoife Moloney napsal(a):
>
> The dynamic linker already has the `glibc-hwcaps` mechanism to load
> optimized implementations of ''shared objects'' [3]. This means that
> packages can provide optimized libraries and they linker will be
> automatically load them from separate directories if appropriate.
> (For AMD64, this is `/usr/lib64/glibc-hwcaps/x86-64-v{2,3,4}/`.)
>
>
> Is this something specific to x86_64 that the libs needs to be nested in a place such as `/usr/lib64/glibc-hwcaps/x86-64-v{2,3,4}/`? Why not use e.g. `/usr/x86-64-v{2,3,4}/lib` directories instead? Or something more universal.
IIRC this is not specific to x86_64 (other arches can also use it).
This is specific to glibc implementation (implemented 4 years ago
IIRC). The paths glibc dynamic loader looks for shared libraries does
not change, but it will check specific subdirectories based on your
hardware capabilities.
I believe openSUSE already ships optional architecture optimized
packages, which use exactly this glibc feature.
david
>
> Vít
>
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