If rpm doesn't work in your environment you can use rpm2cpio to convert rpm to cpio and then just extract cpio's content on your embedded system.
But usually messing with glibc is a bad idea - you can end up with totally unusable system and will have to re-install it.
Another possible approach: on the development system where your application is working pack your application using either Ermine (http://magicErmine.com
) or statifier (http://statifier.sf.net
Both of them create from executable and all needed shared libraries self-contained executable. This executable can be copied virtually to any Linux system (with same processor
and run. No need to install any additional shared libraries.