I want to run a C++ program on an older device, which only supports glibc 2.11.3. So I have to create a develloping enviroment using the same glibc version.

Currently it is running version 2.25 x86\_64 for openSUSE Tumbleweed.

First of all, where do I find a valid \*.rpm file of the old version. Also is it possible to install it? 

Trying to unistall glibc tells me that will crash the operation system. :-)

Thank you all for your support.