root@naren-laptop:/usr/src/ust-0.1# gcc -o test -lust -lurcu test.c
root@naren-laptop:/usr/src/ust-0.1# usttrace ./test 
./test: symbol lookup error: /usr/local/lib/libust.so.0: undefined symbol: urcu_reader
Waiting for ustd to shutdown...
Trace was output in:  /root/.usttraces/naren-laptop-20100208224431
root@naren-laptop:/usr/src/ust-0.1#