Compiler errors

CMakeFiles/sweepLaserInterface_node.dir/src/sweepLaserInterface.cpp.o: In function `main':
sweepLaserInterface.cpp:(.text+0x8c): undefined reference to `CMotorInterface::CMotorInterface()'
sweepLaserInterface.cpp:(.text+0x1fc): undefined reference to `CSickLMS115Interface::queryScanConfig()'
sweepLaserInterface.cpp:(.text+0x329): undefined reference to `CMotorInterface::open(char const*)'
sweepLaserInterface.cpp:(.text+0x440): undefined reference to `CMotorInterface::homeMotor()'
sweepLaserInterface.cpp:(.text+0x4c6): undefined reference to `CMotorInterface::getPosition()'
sweepLaserInterface.cpp:(.text+0x668): undefined reference to `CSickLMS115Interface::startSingleMeasurement()'
sweepLaserInterface.cpp:(.text+0x688): undefined reference to `CSickLMS115Interface::getNextMeasurement(double&, TSickLMS111ScanData&)'
sweepLaserInterface.cpp:(.text+0x78e): undefined reference to `CMotorInterface::setStart(double)'
sweepLaserInterface.cpp:(.text+0x7a5): undefined reference to `CMotorInterface::setEnd(double)'
sweepLaserInterface.cpp:(.text+0x7bc): undefined reference to `CMotorInterface::setSpeed(double)'
sweepLaserInterface.cpp:(.text+0x7cb): undefined reference to `CMotorInterface::startSweeping()'
sweepLaserInterface.cpp:(.text+0x7da): undefined reference to `CSickLMS115Interface::startMeasurementMode()'
sweepLaserInterface.cpp:(.text+0x7ee): undefined reference to `CSickLMS115Interface::startSingleMeasurement()'
sweepLaserInterface.cpp:(.text+0x80e): undefined reference to `CSickLMS115Interface::getNextMeasurement(double&, TSickLMS111ScanData&)'
sweepLaserInterface.cpp:(.text+0xb64): undefined reference to `CMotorInterface::stopSweeping()'
sweepLaserInterface.cpp:(.text+0xb73): undefined reference to `CMotorInterface::close()'
sweepLaserInterface.cpp:(.text+0xba5): undefined reference to `CMotorInterface::~CMotorInterface()'
sweepLaserInterface.cpp:(.text+0xf4e): undefined reference to `CMotorInterface::~CMotorInterface()'
CMakeFiles/sweepLaserInterface_node.dir/src/sweepLaserInterface.cpp.o: In function `CSickLMS115Interface::initializeTcp(char const*)':
sweepLaserInterface.cpp:(.text._ZN20CSickLMS115Interface13initializeTcpEPKc[CSickLMS115Interface::initializeTcp(char const*)]+0x24): undefined reference to `CSMSerialSocketFileInterface::initializeTcp(char const*, int)'
CMakeFiles/sweepLaserInterface_node.dir/src/sweepLaserInterface.cpp.o: In function `CSickLMS115Interface::CSickLMS115Interface()':
sweepLaserInterface.cpp:(.text._ZN20CSickLMS115InterfaceC2Ev[_ZN20CSickLMS115InterfaceC5Ev]+0x14): undefined reference to `CSMSerialSocketFileInterface::CSMSerialSocketFileInterface()'
CMakeFiles/sweepLaserInterface_node.dir/src/sweepLaserInterface.cpp.o: In function `CSickLMS115Interface::~CSickLMS115Interface()':
sweepLaserInterface.cpp:(.text._ZN20CSickLMS115InterfaceD2Ev[_ZN20CSickLMS115InterfaceD5Ev]+0x14): undefined reference to `CSMSerialSocketFileInterface::~CSMSerialSocketFileInterface()'
collect2: ld returned 1 exit status
make[2]: *** [/home/randy/catkin_ws/devel/lib/toro/sweepLaserInterface_node] Error 1
make[1]: *** [toro/CMakeFiles/sweepLaserInterface_node.dir/all] Error 2
make: *** [all] Error 2