krfb compile error

cd /home/kde-devel/kde/build/KDE/kdenetwork/krfb && /usr/bin/cmake -P CMakeFiles/krfb.dir/cmake_clean_target.cmake
cd /home/kde-devel/kde/build/KDE/kdenetwork/krfb && /usr/bin/c++     -Wnon-virtual-dtor -Wno-long-long -ansi -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security -fno-exceptions -fno-check-new -fno-common -fvisibility=hidden -g3 -fno-inline  -fPIC "CMakeFiles/krfb.dir/krfb_automoc.o" "CMakeFiles/krfb.dir/main.o" "CMakeFiles/krfb.dir/trayicon.o" "CMakeFiles/krfb.dir/krfbserver.o" "CMakeFiles/krfb.dir/manageinvitationsdialog.o" "CMakeFiles/krfb.dir/invitationmanager.o" "CMakeFiles/krfb.dir/invitedialog.o" "CMakeFiles/krfb.dir/invitation.o" "CMakeFiles/krfb.dir/connectiondialog.o" "CMakeFiles/krfb.dir/personalinvitedialog.o" "CMakeFiles/krfb.dir/connectioncontroller.o" "CMakeFiles/krfb.dir/events.o" "CMakeFiles/krfb.dir/framebuffer.o" "CMakeFiles/krfb.dir/qtframebuffer.o" "CMakeFiles/krfb.dir/x11framebuffer.o" "CMakeFiles/krfb.dir/krfbconfig.o"   -o krfb -rdynamic -L/home/kde-devel/kde/lib -ljpeg -lslp -lvncserver -lXdamage -lkdnssd -Wl,-rpath,/home/kde-devel/kde/lib:/home/kde-devel/kde/lib
CMakeFiles/krfb.dir/krfbserver.o: In function `KrfbServer::checkX11Capabilities()':
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/krfbserver.cpp:283: undefined reference to `XTestQueryExtension'
CMakeFiles/krfb.dir/events.o: In function `PointerEvent::exec()':
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:159: undefined reference to `XTestFakeMotionEvent'
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:166: undefined reference to `XTestFakeButtonEvent'
CMakeFiles/krfb.dir/events.o: In function `KeyboardEvent::tweakModifiers(signed char, bool)':
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:87: undefined reference to `XTestFakeKeyEvent'
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:91: undefined reference to `XTestFakeKeyEvent'
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:97: undefined reference to `XTestFakeKeyEvent'
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:102: undefined reference to `XTestFakeKeyEvent'
/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:107: undefined reference to `XTestFakeKeyEvent'
CMakeFiles/krfb.dir/events.o:/home/kde-devel/kde/src/KDE/kdenetwork/krfb/events.cpp:126: more undefined references to `XTestFakeKeyEvent' follow
collect2: ld returned 1 exit status
make[3]: *** [krfb/krfb] Error 1
make[3]: Leaving directory `/home/kde-devel/kde/build/KDE/kdenetwork'
make[2]: *** [krfb/CMakeFiles/krfb.dir/all] Error 2
make[2]: Leaving directory `/home/kde-devel/kde/build/KDE/kdenetwork'
make[1]: *** [krfb/CMakeFiles/krfb.dir/rule] Error 2
make[1]: Leaving directory `/home/kde-devel/kde/build/KDE/kdenetwork'
make: *** [krfb] Error 2
makeobj[0]: Leaving directory `/home/kde-devel/kde/build/KDE/kdenetwork'