LNK2019 & LNK1120 in Qt ERRORS

[Anonymous]

To whom it may concern,

I hope you are well.

I have installed GeographicLib then added the library in the .pro file of the Qt. After that, I included #include <geographiclib geodesic.hpp=""> and added using namespace GeographicLib in my .cpp code and wrote a simple code.
I have run the code via:</geographiclib>

windows 10
Qt 6.5.3
MSVC2019_64bit

When I run my code I got the attached errors. I want to kindly ask you to help me.

Thank you in advance,
Sincerely yours,
Zahra

[Charles Karney]

You don't give enough details to diagnose your problem. But it looks
like the linker doesn't know the location of the GeographicLib library.
That would be the place to look.

Can you link any external library to your application? If not, then
you need to seek help in a Qt-specific forum.

I haven't messed with Qt's .pro files for many years. Instead, I build
Qt projects with CMake. (Qt Creator can handle CMake builds.) In this
case, you just use find_package(GeographicLib ...) to tell the system
where to find Geographiclib.

[Anonymous]

Dear Charles,

Thank you for your reply.

The following is the .cpp code which I tried to run:

#include "test.h"
#include "qdebug.h"

#undef GetObject
#include <iostream>
#include <GeographicLib/Geodesic.hpp>

using namespace std;
using namespace GeographicLib;

//#pragma comment(lib, "GeographicLib-i.lib") // Replace with the actual lib file name

Test::Test(QObject *parent)
    : QObject{parent}
{

    // Create a new Geodesic object
    GeographicLib::Geodesic geod(GeographicLib::Constants::WGS84_a(),
                                 GeographicLib::Constants::WGS84_f());

    // Define the start and end points
    double lat1 = 50.0, lon1 = 10.0, lat2 = 50.01, lon2 = 9.990;

    // Calculate the total distance between the two points
//    geod.Inverse(lat1, lon1, lat2, lon2,
//                 GeographicLib::Geodesic::DISTANCE);

    // Interpolate points at intervals of 100 meters
    for (double s = 100; s <= s12; s += 100) {
        double lat, lon;
        geod.Direct(lat1, lon1, 0, s, lat, lon);
        qDebug() << "Point: " << lat << ", " << lon;
    }
}

and in the .pro file I have put the path of the GeographicLib:

QT += quick

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        main.cpp \
        test.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target



HEADERS += \
    test.h



win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../lib/ -lGeographicLib-i
#else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../lib/ -lGeographicLib-id
else:unix: LIBS += -L$$PWD/../lib/ -lGeographicLib-i

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

As I am using the sample code of the ArcGis which has used qmake so I can not use Qt CMake.

Yes I can use other library such as pcap in my code.

Thank you agian for your response,
Sincerely yours,
Zahra

[Charles Karney]

Your .pro seems OK. But then I don't know the intricacies of .pro
files. How does your application find bin/GeographicLib.dll? Is the
bin directory in you PATH?

Your problems are, most likely, nothing to do with GeographicLib but
instead how you use any external library in your program. In this
case, you need to seek help in a Qt-specific forum. Since your sample
code is from ArcGis, maybe you can get help there.

If you do resolve your problem, please post the solution to this forum
so others can benefit from your experience.

[Anonymous]

Dear Charles,

Thank you for your reply.

I added the .dll files into my Debug folder and the errors were removed.

Sincerely yours,
Zahra