RGBD SLAM v2 Build error

HI, I was trying to modify everything possible to make the RGBDSLAM_v2 package run in ROS Indigo on Ubuntu 14.04 . However I am getting error on catkin_make. Please help with the approach to debug this. I have qt4-* installed. The error is as follows: ***/home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:976: undefined reference to `QIcon::QIcon()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::createMenus()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:976: undefined reference to `QIcon::fromTheme(QString const&, QIcon const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:976: undefined reference to `QIcon::~QIcon()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:976: undefined reference to `QIcon::~QIcon()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:976: undefined reference to `QIcon::~QIcon()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:976: undefined reference to `QIcon::~QIcon()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:857: undefined reference to `QIcon::~QIcon()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::operator+=(char const*)': /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::fromAscii(char const*, int)' /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::append(QString const&)' /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::fromAscii(char const*, int)' /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::append(QString const&)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setup()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:100: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::operator+=(char const*)': /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::fromAscii(char const*, int)' /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::append(QString const&)' /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::fromAscii(char const*, int)' /usr/include/qt4/QtCore/qstring.h:441: undefined reference to `QString::append(QString const&)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setup()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:107: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setup()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:110: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:113: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:116: undefined reference to `QSplitter::QSplitter(Qt::Orientation, QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:117: undefined reference to `QSplitter::addWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:118: undefined reference to `QSplitter::addWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:119: undefined reference to `QSplitter::addWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:120: undefined reference to `QSplitter::addWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:124: undefined reference to `QSplitter::QSplitter(Qt::Orientation, QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:125: undefined reference to `QMainWindow::setCentralWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:130: undefined reference to `QSplitter::addWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:133: undefined reference to `QSplitter::addWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:139: undefined reference to `QWidget::setMinimumSize(int, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QWidget::resize(int, int)': /usr/include/qt4/QtGui/qwidget.h:1015: undefined reference to `QWidget::resize(QSize const&)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::Graphical_UI()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:37: undefined reference to `QMainWindow::QMainWindow(QWidget*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap': /usr/include/qt4/QtCore/qmap.h:182: undefined reference to `QMapData::shared_null' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::Graphical_UI()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:40: undefined reference to `QWidget::setWindowTitle(QString const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:37: undefined reference to `QMainWindow::~QMainWindow()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::Graphical_UI(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:43: undefined reference to `QMainWindow::QMainWindow(QWidget*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap': /usr/include/qt4/QtCore/qmap.h:182: undefined reference to `QMapData::shared_null' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::Graphical_UI(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:46: undefined reference to `QWidget::setWindowTitle(QString const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:43: undefined reference to `QMainWindow::~QMainWindow()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::toggleScreencast(bool)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:331: undefined reference to `QFileDialog::getSaveFileName(QWidget*, QString const&, QString const&, QString const&, QString*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:333: undefined reference to `QString::toLocal8Bit() const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `~QByteArray': /usr/include/qt4/QtCore/qbytearray.h:401: undefined reference to `qFree(void*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::toggleScreencast(bool)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:335: undefined reference to `QMainWindow::statusBar() const' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:335: undefined reference to `QStatusBar::showMessage(QString const&, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setParam(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:390: undefined reference to `QString::toLocal8Bit() const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `~QByteArray': /usr/include/qt4/QtCore/qbytearray.h:401: undefined reference to `qFree(void*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setParam(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:395: undefined reference to `QInputDialog::getText(QWidget*, QString const&, QString const&, QLineEdit::EchoMode, QString const&, bool*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:397: undefined reference to `QString::toLocal8Bit() const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setParam(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:405: undefined reference to `QInputDialog::getInt(QWidget*, QString const&, QString const&, int, int, int, int, bool*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setParam(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:415: undefined reference to `QInputDialog::getDouble(QWidget*, QString const&, QString const&, double, double, double, int, bool*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList': /usr/include/qt4/QtCore/qlist.h:121: undefined reference to `QListData::shared_null' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setParam(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:427: undefined reference to `QInputDialog::getItem(QWidget*, QString const&, QString const&, QStringList const&, int, bool, bool*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `qStringComparisonHelper': /usr/include/qt4/QtCore/qstring.h:919: undefined reference to `QString::codecForCStrings' /usr/include/qt4/QtCore/qstring.h:919: undefined reference to `QString::fromAscii(char const*, int)' /usr/include/qt4/QtCore/qstring.h:919: undefined reference to `QString::operator==(QString const&) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::operator==(char const*) const': /usr/include/qt4/QtCore/qstring.h:921: undefined reference to `QString::operator==(QLatin1String const&) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList': /usr/include/qt4/QtCore/qlist.h:121: undefined reference to `QListData::shared_null' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::tr(char const*, char const*)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.h:53: undefined reference to `QMetaObject::tr(char const*, char const*) const' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setParam()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:457: undefined reference to `QInputDialog::getItem(QWidget*, QString const&, QString const&, QStringList const&, int, bool, bool*, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setLabelToImage(QLabel*, QImage)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:169: undefined reference to `QImage::size() const' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:169: undefined reference to `QWidget::setMaximumHeight(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:170: undefined reference to `QImage::size() const' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:170: undefined reference to `QWidget::setMinimumHeight(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:172: undefined reference to `QLabel::setAlignment(QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:173: undefined reference to `QPixmap::fromImage(QImage const&, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:173: undefined reference to `QLabel::setPixmap(QPixmap const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:173: undefined reference to `QPixmap::~QPixmap()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:174: undefined reference to `QWidget::repaint()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:173: undefined reference to `QPixmap::~QPixmap()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setFeatureImage(QImage)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:179: undefined reference to `QImage::QImage(QImage const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:179: undefined reference to `QImage::~QImage()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:179: undefined reference to `QImage::~QImage()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setFeatureFlowImage(QImage)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:183: undefined reference to `QImage::QImage(QImage const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:183: undefined reference to `QImage::~QImage()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:183: undefined reference to `QImage::~QImage()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setVisualImage(QImage)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:187: undefined reference to `QImage::QImage(QImage const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:187: undefined reference to `QImage::~QImage()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:187: undefined reference to `QImage::~QImage()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setDepthImage(QImage)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:191: undefined reference to `QImage::QImage(QImage const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:191: undefined reference to `QImage::~QImage()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:191: undefined reference to `QImage::~QImage()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:985: undefined reference to `QScrollArea::QScrollArea(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:986: undefined reference to `QWidget::setMinimumWidth(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:987: undefined reference to `QWidget::QWidget(QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:988: undefined reference to `QWidget::setMinimumWidth(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:989: undefined reference to `QGridLayout::QGridLayout(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:992: undefined reference to `QGridLayout::setVerticalSpacing(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:993: undefined reference to `QLayout::setContentsMargins(int, int, int, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:994: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:995: undefined reference to `QLabel::setAlignment(QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:996: undefined reference to `QLabel::setWordWrap(bool)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:997: undefined reference to `QWidget::setMinimumWidth(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:998: undefined reference to `QWidget::setMinimumHeight(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:999: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, int, int, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1001: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1002: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1003: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1004: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::operator+=(QString const&)': /usr/include/qt4/QtCore/qstring.h:274: undefined reference to `QString::append(QString const&)' /usr/include/qt4/QtCore/qstring.h:274: undefined reference to `QString::append(QString const&)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1031: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1032: undefined reference to `QLabel::setTextFormat(Qt::TextFormat)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1033: undefined reference to `QFrame::setLineWidth(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1034: undefined reference to `QFrame::setFrameStyle(int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1036: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1039: undefined reference to `QFrame::QFrame(QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1040: undefined reference to `QWidget::setGeometry(QRect const&)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1041: undefined reference to `QFrame::setFrameShape(QFrame::Shape)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1042: undefined reference to `QFrame::setFrameShadow(QFrame::Shadow)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1043: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, int, int, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::operator+=(QString const&)': /usr/include/qt4/QtCore/qstring.h:274: undefined reference to `QString::append(QString const&)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1011: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1012: undefined reference to `QLabel::setTextFormat(Qt::TextFormat)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1013: undefined reference to `QLabel::setAlignment(QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1014: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:419: undefined reference to `QString::fromAscii_helper(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1015: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1016: undefined reference to `QLabel::setAlignment(QFlags)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1017: undefined reference to `QLabel::setWordWrap(bool)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1018: undefined reference to `QGridLayout::addWidget(QWidget*, int, int, int, int, QFlags)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString': /usr/include/qt4/QtCore/qstring.h:879: undefined reference to `QString::shared_null' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::fromStdString(std::string const&)': /usr/include/qt4/QtCore/qstring.h:1048: undefined reference to `QString::fromAscii(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1025: undefined reference to `QString::number(int, int)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1027: undefined reference to `QString::number(double, char, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QString::operator=(char const*)': /usr/include/qt4/QtCore/qstring.h:425: undefined reference to `QString::fromAscii(char const*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::showOptions()': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1047: undefined reference to `QWidget::setLayout(QLayout*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1048: undefined reference to `QScrollArea::setWidget(QWidget*)' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1050: undefined reference to `QWidget::raise()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1051: undefined reference to `QWidget::activateWindow()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1003: undefined reference to `QLabel::~QLabel()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1051: undefined reference to `QLabel::~QLabel()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1003: undefined reference to `QLabel::~QLabel()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:1051: undefined reference to `QLabel::~QLabel()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setStatus(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:209: undefined reference to `QStatusBar::showMessage(QString const&, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setInfo2(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:213: undefined reference to `QWidget::repaint()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::setInfo(QString)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:217: undefined reference to `QWidget::repaint()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `Graphical_UI::toggleFullscreen(bool)': /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:465: undefined reference to `QWidget::showFullScreen()' /home/raman/catkin_ws/src/rgbdslam_v2/src/qt_gui.cpp:467: undefined reference to `QWidget::showNormal()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `~QString': /usr/include/qt4/QtCore/qstring.h:880: undefined reference to `QString::free(QString::Data*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::free(QListData::Data*)': /usr/include/qt4/QtCore/qlist.h:759: undefined reference to `qFree(void*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap::freeData(QMapData*)': /usr/include/qt4/QtCore/qmap.h:655: undefined reference to `QMapData::continueFreeData(int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::free(QListData::Data*)': /usr/include/qt4/QtCore/qlist.h:759: undefined reference to `qFree(void*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::detach_helper_grow(int, int)': /usr/include/qt4/QtCore/qlist.h:679: undefined reference to `QListData::detach_grow(int*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::free(QListData::Data*)': /usr/include/qt4/QtCore/qlist.h:759: undefined reference to `qFree(void*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::append(int const&)': /usr/include/qt4/QtCore/qlist.h:530: undefined reference to `QListData::append()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::detach_helper_grow(int, int)': /usr/include/qt4/QtCore/qlist.h:679: undefined reference to `QListData::detach_grow(int*, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `~QString': /usr/include/qt4/QtCore/qstring.h:880: undefined reference to `QString::free(QString::Data*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::free(QListData::Data*)': /usr/include/qt4/QtCore/qlist.h:759: undefined reference to `qFree(void*)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QList::append(QString const&)': /usr/include/qt4/QtCore/qlist.h:530: undefined reference to `QListData::append()' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap::detach_helper()': /usr/include/qt4/QtCore/qmap.h:755: undefined reference to `QMapData::createData(int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap::node_create(QMapData*, QMapData::Node**, int const&, QProgressBar* const&)': /usr/include/qt4/QtCore/qmap.h:453: undefined reference to `QMapData::node_create(QMapData::Node**, int, int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap::freeData(QMapData*)': /usr/include/qt4/QtCore/qmap.h:655: undefined reference to `QMapData::continueFreeData(int)' /usr/include/qt4/QtCore/qmap.h:655: undefined reference to `QMapData::continueFreeData(int)' CMakeFiles/rgbdslam.dir/src/qt_gui.o: In function `QMap::node_create(QMapData*, QMapData::Node**, int const&, QProgressBar* const&)': /usr/include/qt4/QtCore/qmap.h:453: undefined reference to `QMapData::node_create(QMapData::Node**, int, int)' CMakeFiles/rgbdslam.dir/src/features.o: In function `createDescriptorExtractor(std::string const&)': /home/raman/catkin_ws/src/rgbdslam_v2/src/features.cpp:107: undefined reference to `cv::SIFT::SIFT(int, int, double, double, double)' /home/raman/catkin_ws/src/rgbdslam_v2/src/features.cpp:122: undefined reference to `cv::SURF::SURF()' /home/raman/catkin_ws/src/rgbdslam_v2/src/features.cpp:119: undefined reference to `cv::SURF::SURF()' /home/raman/catkin_ws/src/rgbdslam_v2/src/features.cpp:132: undefined reference to `cv::SURF::SURF()' collect2: error: ld returned 1 exit status make[2]: *** [/home/raman/catkin_ws/devel/lib/rgbdslam/rgbdslam] Error 1 make[1]: *** [rgbdslam_v2/CMakeFiles/rgbdslam.dir/all] Error 2 make: *** [all] Error 2 Invoking "make -j4 -l4" failed***