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The ld.so diagnostics already prints AT_HWCAP values, but only in
hexadecimal. To avoid duplicating the strings, consolidate the
hwcap_names from cpu-features.h on a new file, dl-hwcap-info.h
(and it also improves the hwcap string description with more
values).
For future AT_HWCAP3/AT_HWCAP4 extensions, it is just a matter
to add them on dl-hwcap-info.c so both ld diagnostics and
tunable filtering will parse the new values.
Checked on powerpc64le-linux-gnu.
Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
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