x86 CPU features detection for applications (and AMX)

[Florian Weimer]

* Enrico Weigelt:

> On 30.06.21 16:34, Florian Weimer wrote:
>
>> It breaks integration with system-wide settings, such as user/group
>> databases, host name lookup, and cryptographic policies.  In many
>> environments, that is not really an option.
>
> Not necessarily, these can still be applied (and fairly simple).
> You actually have to twist more extra knobs if to wanted those weird
> things to happen.

Sorry, this is just not true.  You cannot load system libraries such as
NSS modules or cryptographic libraries with a custom glibc because the
system glibc could be newer, and glibc does not provide that kind of
compatibility (only the other way round).

Thanks,
Florian