qDebug / qStringList - Problem

[EMKAH]

Hi there,

i tried to built a very simple application, just to test what SQL database plugins are installed:

#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QtSql/QSqlDatabase>
#include <QStringList>
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    qDebug() << QSqlDatabase::drivers();
 
 
    return a.exec();
}

#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QtSql/QSqlDatabase>
#include <QStringList>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    qDebug() << QSqlDatabase::drivers();

    
    return a.exec();
}

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This is all the code i've written. I know that this code worked in former versions of Qt, but now, it doesn't anymore. When I try to compile, i get this "symbol(s) not found for architecture x86_64" error.

Here's the complete output:

make: Entering directory `/.../MyProject-build-Desktop-Debug'
cd subProject/ && /usr/bin/make -f Makefile 
make[1]: Entering directory `/.../My-build-Desktop-Debug/subProject'
g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -o dsp_Server main.o   -F/Library/Frameworks -L/Library/Frameworks -framework QtCore 
Undefined symbols for architecture x86_64:
  "QSqlDatabase::drivers()", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[1]: *** [dsp_Server] Error 1
make[1]: Leaving directory `/.../MyProject-build-Desktop-Debug/subProject'
make: Leaving directory `/.../MyProject-build-Desktop-Debug'
make: *** [subProject-make_default] Error 2
17:38:12: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project MyProject (target: Desktop)
When executing step 'Make'

make: Entering directory `/.../MyProject-build-Desktop-Debug'
cd subProject/ && /usr/bin/make -f Makefile 
make[1]: Entering directory `/.../My-build-Desktop-Debug/subProject'
g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -o dsp_Server main.o   -F/Library/Frameworks -L/Library/Frameworks -framework QtCore 
Undefined symbols for architecture x86_64:
  "QSqlDatabase::drivers()", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[1]: *** [dsp_Server] Error 1
make[1]: Leaving directory `/.../MyProject-build-Desktop-Debug/subProject'
make: Leaving directory `/.../MyProject-build-Desktop-Debug'
make: *** [subProject-make_default] Error 2
17:38:12: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project MyProject (target: Desktop)
When executing step 'Make'

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I'm using Qt 4.8.2 under OS X 10.8.2. Can anybody help?

Thanks,
Markus

EDIT: Sorry for misfitting title... Before this problem occured, i had problems because i forgot to add the #include <QStringList> line (which also wasn't necessary the last time i used Qt)...

[amleto]

how did you build Qt? with g++ and -arch x86_64?

[wagmare]

Not sure.. but looks like 32bit, 64 bit problem ..may be. create the project file .pro freshly .. just a suggestion ...

[EMKAH]

how did you build Qt? with g++ and -arch x86_64?

I installed the ready-to-use dmg image.

Not sure.. but looks like 32bit, 64 bit problem ..may be. create the project file .pro freshly .. just a suggestion ...

This is my .pro file:

QT       += core
 
QT       -= gui
 
TARGET = subProject
CONFIG   += console
CONFIG   -= app_bundle
 
TEMPLATE = app
 
 
SOURCES += main.cpp

QT       += core

QT       -= gui

TARGET = subProject
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp

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When I add the line

CONFIG   -= x86_64

CONFIG   -= x86_64

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, it still throws the same error message (I cleaned everything before).

[anda_skoa]

Looks like you are missing the sql module in your QT config line

QT += sql

Cheers,
_

[EMKAH]

*...* Damn. I tried this with QT += network already...

Thanks A LOT!!! This did cost me over 3 hours of frustration...