--- volk/lib/CMakeLists.txt~	2012-01-08 03:29:13.000000000 +0800
+++ volk/lib/CMakeLists.txt	2012-02-11 15:00:41.123911398 +0800
@@ -322,6 +322,7 @@
 
 #create the volk runtime library
 add_library(volk SHARED ${volk_sources})
+target_link_libraries(volk m)
 if(ORC_FOUND)
     target_link_libraries(volk ${ORC_LIBRARIES})
 endif(ORC_FOUND)
--- gruel/src/lib/CMakeLists.txt~	2012-01-08 03:29:13.000000000 +0800
+++ gruel/src/lib/CMakeLists.txt	2012-02-11 15:10:39.331664388 +0800
@@ -81,7 +81,7 @@
 )
 
 add_library(gruel SHARED ${gruel_sources})
-target_link_libraries(gruel ${Boost_LIBRARIES})
+target_link_libraries(gruel ${Boost_LIBRARIES} pthread)
 GR_LIBRARY_FOO(gruel RUNTIME_COMPONENT "gruel_runtime" DEVEL_COMPONENT "gruel_devel")
 
 ########################################################################
--- gr-qtgui/lib/CMakeLists.txt~	2012-01-08 03:29:13.000000000 +0800
+++ gr-qtgui/lib/CMakeLists.txt	2012-02-11 15:17:48.443908567 +0800
@@ -87,7 +87,7 @@
 
 add_definitions(-DQWT_DLL) #setup QWT library linkage
 add_library(gnuradio-qtgui SHARED ${qtgui_srcs})
-target_link_libraries(gnuradio-qtgui ${qtgui_libs})
+target_link_libraries(gnuradio-qtgui ${qtgui_libs} rt)
 GR_LIBRARY_FOO(gnuradio-qtgui RUNTIME_COMPONENT "qtgui_runtime" DEVEL_COMPONENT "qtgui_devel")
 
 ########################################################################