Installing a new glibc is not
a task for a newbie (it is much more difficult than installing a new kernel). But if you want to give it a try and are willing to risk totally hosing your system (what happened the last time I tried it) make sure you read up a bit. I suggest you read the chapter on building glibc from the Linux From Scratch book, which you may find at http://lfs.osuosl.org/lfs/view/stabl...r06/glibc.html
and see if it doesn't help you.
But unless you have a very good reason to, I suggest staying away from trying to upgrade glibc. Also, don't confuse glibc with glib, which is something entirely different.