diff -rupN canorus-0.7.old/src/CMakeLists.txt canorus-0.7/src/CMakeLists.txt
--- canorus-0.7.old/src/CMakeLists.txt	2010-05-27 20:08:07.000000000 -0400
+++ canorus-0.7/src/CMakeLists.txt	2010-05-30 21:25:00.000000000 -0400
@@ -611,7 +611,7 @@ ENDIF(USE_PYTHON)
 # command. Never remove that line :-)
 # Add ${QT_QTTEST_LIBRARY} below to add the Qt Test library as well
 # Add ${POPPLERQT4_LIBRARY} ${POPPLER_LIBRARY} to reactivate poppler libraries
-TARGET_LINK_LIBRARIES(canorus ${QT_LIBRARIES} ${RUBY_LIBRARY} ${PYTHON_LIBRARY} )
+TARGET_LINK_LIBRARIES(canorus ${QT_LIBRARIES} ${RUBY_LIBRARY} ${PYTHON_LIBRARY} pthread z)
 
 ############################
 # RtMIDI Library additions #