/usr/lib/x86_64-linux-gnu/libdl.so:-1: error: error adding symbols: DSO missing from command line

Naveen_D

Hello everyone,

While compling my Qt code I am getting this error..can anyone tell what is this error and what i need to do?

error: /home/ubuntu/bin/julius-4.2.2/SimpleJulius/.//libjulius.a(plugin.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
/usr/lib/x86_64-linux-gnu/libdl.so:-1: error: error adding symbols: DSO missing from command line
error: collect2: error: ld returned 1 exit status

My code is as follows,

#-------------------------------------------------
#
# Project created by QtCreator 2016-10-28T11:51:01
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = SimpleJulius
TEMPLATE = app

LIBS += -lpg

SOURCES += main.cpp\
        juliuswidget.cpp

HEADERS  += juliuswidget.h \
    julius/juliuslib.h \
    julius/callback.h \
    julius/config.h \
    julius/jconf.h \
    julius/julius.h \
    julius/recog.h \
    julius/acconfig.h \
    julius/beam.h \
    julius/define.h \
    julius/extern.h \
    julius/global.h \
    julius/graph.h \
    julius/jfunc.h \
    julius/misc.h \
    julius/multi-gram.h \
    julius/plugin.h \
    julius/search.h \
    julius/trellis.h \
    julius/useropt.h \
    julius/wchmm.h

unix:!macx: LIBS += -L$$PWD/./ -ljulius

INCLUDEPATH += $$PWD/.
DEPENDPATH += $$PWD/.

unix:!macx: PRE_TARGETDEPS += $$PWD/./libjulius.a

.h file

#ifndef JULIUSWIDGET_H
#define JULIUSWIDGET_H

#include <QWidget>
#include <QPushButton>
#include <QDebug>
#include <QVBoxLayout>
#include <QFile>
#include <QTextEdit>
#include <QDir>


extern "C" {

#include "julius/juliuslib.h"

}

class Juliuswidget : public QWidget
{
    Q_OBJECT

public:
    Juliuswidget(QWidget *parent = 0);
    ~Juliuswidget();

private:
    QPushButton *m_Startbtn;
    QVBoxLayout *m_MainLyt;



public slots:
    void VstartRecordingAudio();
};

#endif // JULIUSWIDGET_H

.cpp file

#include "juliuswidget.h"

Juliuswidget::Juliuswidget(QWidget *parent)
    : QWidget(parent)
{
    m_Startbtn=  new QPushButton("Start Recording");
    m_MainLyt =new QVBoxLayout;

    m_MainLyt->addWidget(m_Startbtn);

    this->setLayout(m_MainLyt);

    connect(m_Startbtn,SIGNAL(clicked()),this,SLOT(VstartRecordingAudio()));
}


void Juliuswidget::VstartRecordingAudio()
{
    qDebug()<<"Started Recording"<<endl;

    QFile* file = new QFile();
    QDir::setCurrent("/home/ubuntu/bin/julius-4.2.2/SampleTest");
    file->setFileName("julian.jconf");

    file->open(QIODevice::ReadWrite);

    QString strFile1(file->readAll());
    QByteArray b_Array= strFile1.toLatin1();
    file->close();

    char *JconfFile=b_Array.data();
//    qDebug()<<"file loaded is"<<JconfFile<<endl;
    Jconf *jconf=j_config_load_file_new(JconfFile);
    qDebug()<<"jconf file is"<<jconf<<endl;
}

Juliuswidget::~Juliuswidget()
{

}

Thanks