well its a debian (whonix bug) and i think its specifically to wheezy , the bug can shown when u want to make ./xxxx program (or to make it run) , as in my case i wanted to install the Telegram by this method:-
sudo wget https://tdesktop.com/linux32
tar xJvf tsetup32.0.8.13.tar.xz
cd Telegram/
./Telegram
then after the last code , this message going to be shown :-
./Telegram: /lib/i386-linux-gnu/libc.so.6: version `GLIBC_2.15' not found (required by ./Telegram)
here is a debian website talking about this error:-
/usr/bin/python: /lib/i386-linux-gnu/libc.so.6: version `GLIBC_2.15’ not found (required by /usr/bin/python)