that lib you have there is glibc6-2.2.93
as opposed to the old glibc5 series
be carefull upgrading glibc from source -- outside of your package manager
glibc is the core of the system and requires a little knowhow to compile.
So if you install it from source be aware you are putting your system at risk.
also installing glibc (a rather large pile of libs and utilities) from source will put your package manager out of synk with your system sending you off in a new self compiled direction never to return.
at the very least remember to unpack the
Glibc-linuxthreads inside the glibc directory
and use the configure flag
or your system won't work
also there are many subtle problems between versions of glibc and versions of gcc
that can require patches before it will compile