Lnk 2019

[alok9871]

Hi friends

I have been trying to add a library into my project. My project file looks like this :

QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
TARGET = sdk2
TEMPLATE = app
 
 
 
SOURCES += main.cpp\
        mainwindow.cpp
 
HEADERS  += mainwindow.h \
    ../../../../../SDKstudy/Runtime5.1/include/fgrab_struct.h \
    ../../../../../SDKstudy/Runtime5.1/include/fgrab_prototyp.h \
    ../../../../../SDKstudy/Runtime5.1/include/fgrab_define.h
 
INCLUDEPATH += $$PWD/../../../../../SDKstudy/Runtime5.1\include
DEPENDPATH += $$PWD/../../../../../SDKstudy/Runtime5.1\include
 
 
INCLUDEPATH += C:\Users\Alok\SDKstudy\Runtime5.1\dll\mE4AD1-CL
DEPENDPATH += C:\Users\Alok\SDKstudy\Runtime5.1\dll\mE4AD1-CL
 
 
FORMS    += mainwindow.ui
 
 
 
LIBS += -L$$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64/ -lfglib5
 
INCLUDEPATH += $$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64
DEPENDPATH += $$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64

QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = sdk2
TEMPLATE = app



SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h \
    ../../../../../SDKstudy/Runtime5.1/include/fgrab_struct.h \
    ../../../../../SDKstudy/Runtime5.1/include/fgrab_prototyp.h \
    ../../../../../SDKstudy/Runtime5.1/include/fgrab_define.h

INCLUDEPATH += $$PWD/../../../../../SDKstudy/Runtime5.1\include
DEPENDPATH += $$PWD/../../../../../SDKstudy/Runtime5.1\include


INCLUDEPATH += C:\Users\Alok\SDKstudy\Runtime5.1\dll\mE4AD1-CL
DEPENDPATH += C:\Users\Alok\SDKstudy\Runtime5.1\dll\mE4AD1-CL


FORMS    += mainwindow.ui



LIBS += -L$$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64/ -lfglib5

INCLUDEPATH += $$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64
DEPENDPATH += $$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64

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When i try to run the code i get the following error

main.obj:-1: error: LNK2019: unresolved external symbol _Fg_Init referenced in function _main


Can you please help me resolve this.



Many thanks

Regards
Alok

[Lykurg]

Are you sure $PWD is pointing to the right directory so that the "../../../" are right? Try to use absolute paths to see if the error still remains.

[alok9871]

Hi Lykurg

I tried using absolute path as well. The error persists still

[Lykurg]

Ok, why do you have e.g. "../../../../../SDKstudy/Runtime5.1/include/fgrab_struct.h" in the HEADERS variable? And how does your main function look like?

[alok9871]

what I did was right clicked on project and clicked on add existing libraries. These syntaxes gets written when we complete adding libraries.


My Main function looks like this :

#include "mainwindow.h"
#include <stdio.h>
#include <QApplication>
 
#include"fgrab_define.h"
#include "fgrab_prototyp.h"
#include "fgrab_struct.h"
 
using namespace std;
 
#define DLLNAME "DualAreaGray16.dll"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Fg_Struct *fg  = NULL;
 
    fg = Fg_Init(DLLNAME, PN_MICROENABLE4AD1CL ); //function defined in library
 
    return a.exec();
}

#include "mainwindow.h"
#include <stdio.h>
#include <QApplication>

#include"fgrab_define.h"
#include "fgrab_prototyp.h"
#include "fgrab_struct.h"

using namespace std;

#define DLLNAME "DualAreaGray16.dll"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Fg_Struct *fg  = NULL;

    fg = Fg_Init(DLLNAME, PN_MICROENABLE4AD1CL ); //function defined in library
    
    return a.exec();
}

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[sdsd]

Hey how did you solve your problem ? I'm stuck on the same thing