Comment 1 for bug 1002672

my info about eglibc is wrong:

===
lvd@ubuserv1204:~$ dpkg --search libdl
libc6: /lib/x86_64-linux-gnu/libdl.so.2
libc6-dev: /usr/lib/x86_64-linux-gnu/libdl.so
libc6-dev: /usr/lib/x86_64-linux-gnu/libdl.a
libc6: /lib/x86_64-linux-gnu/libdl-2.15.so
===

so libc6 is probably the cause.

Also,
===
lvd@ubuserv1204:~$ gcc --print-file-name=libdl.so
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/libdl.so
===