This is what I get:
yaustar@yau-ulaptop:~$ codeblocks
codeblocks: /lib/tls/i686/cmov/libc.so.6: version `GLIBC_2.4' not found (required by codeblocks)
codeblocks: /lib/tls/i686/cmov/libc.so.6: version `GLIBC_2.4' not found (required by /usr/lib/libcodeblocks.so.0)
yaustar@yau-ulaptop:~$ sudo ldconfig
yaustar@yau-ulaptop:~$ codeblocks
codeblocks: /lib/tls/i686/cmov/libc.so.6: version `GLIBC_2.4' not found (required by codeblocks)
codeblocks: /lib/tls/i686/cmov/libc.so.6: version `GLIBC_2.4' not found (required by /usr/lib/libcodeblocks.so.0)
yaustar@yau-ulaptop:~$