`GDALAllRegister@0' when linking GDAL to Qt

sslizz

hello,

I’ve been trying desperately to link GDAL library to Qt (5.0.1) ., but didn’t succeed. I keep getting error messages every times I use a gal function.
@
#include "mainwindow.h"
#include <QApplication>
#include <gdal_priv.h>
#include <cpl_conv.h>
#include <cpl_string.h>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
GDALAllRegister();

w.show();
return a.exec&#40;&#41;;

}

@

and my pro file is

@
#-------------------------------------------------

Project created by QtCreator 2013-04-07T21:45:42

#-------------------------------------------------

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = sans_titre1
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

INCLUDEPATH += "D:/gdal-1.9.2/include"
LIBPATH += -L"D:/gdal-1.9.2/lib/"
LIBS += -lgdal_i
@

then :

undefined reference to `GDALAllRegister@0'

Please help !

DFileccia

Hi ssliz!

I have been successully using GDAL since 1.8.x with both VS and MinGW. From the looks of your PRO file you are using VS. Did you make sure the proper __declspec was set when building the library or the GDAL was built by the same VS as your application?

I have seen this error when both those conditions occur. The former is because no actual symbols are exported. The latter because the name mangling scheme changed between the compilers.

Here is an example of my PRO file that uses GDAL for the OGR spatial referencing.

TARGET = Core
TEMPLATE = lib
VERSION = 1.0.0

CONFIG += shared c++11
QT += sql widgets

HEADERS +=
GeodeticToOGR.h
GeodeticToRaw.h
GeodeticToUTM.h

SOURCES +=
GeodeticToOGR.cpp
GeodeticToRaw.cpp
GeodeticToUTM.cpp

INCLUDEPATH +=
$$PWD/../include
$$PWD/..
$$PWD/../../repo-3rd/include
D:/MinGW/msys/1.0/include

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../repo-3rd/lib -lgeographic
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../repo-3rd/lib -lgeographic
else:unix: LIBS += -L$$PWD/../../repo-3rd/lib -lgeographic

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../repo-3rd/lib -lgdal
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../repo-3rd/lib -lgdal
else:unix: LIBS += -L$$PWD/../../repo-3rd/lib -lgdal