I couldn’t find glibc_2.15 in any of the official repositories for 12.1, is there an easy way to upgrade it anyway? I also wonder why is there glibc_2.15 for openSUSE 12.2 but not for 12.1?
No. Forget it! If you need to run a program which needs glibc 2.15 under 12.1, you have to recompile it with glibc 2.14.
Because a new release came out and used a newer glibc version. But once this choice was made, you can not change it … without recompiling everything.
I see, thank you.