V5 [PATCH 2/2] ldconfig/x86: Add ISA level check to glibc-hwcaps

[Florian Weimer]

* H. J. Lu via Libc-alpha:

> Add ISA level check to detect misplaced shared objects with incompatible
> ISA level requirement in glibc-hwcaps subdirectories:
>
> /sbin/ldconfig: /usr/lib64/glibc-hwcaps/x86-64-v2/libx86-64-isa-level.so: skipped, ISA level mismatch (x86-64-v4 > x86-64-v2)

I think this is conceptually the wrong approach.  ldconfig should copy
the notes into the cache (and aux cache), and ld.so should skip cache
contents that doesn't match the run-time requirements during load.  Then
directory place does not matter that much anymore.

Thanks,
Florian
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