Why is this so hard. (Building examples)

**ohlfsen** · 22nd February 2010, 21:56

Hi guys and Ladies. Really want to learn QT. But why so hard to get going.

Installed QT 4.6.2 binary, open source. Next -> Next -> Next etc on my Windows XP.

Start Creator. Choose sample "Application". Choose Build.

Now shouldn't this just work out of the box. Oh no. I get all the errors described below (shortened).

I really don't want to proceed if I can't resolve this issue which shouldn't be there in the first place (think its important to get a good start, things can soon enough get difficult).

Been sweeping the net for a couple of hours now without getting anything.

Somebody got some pointers in the right direction please. Don't want to quit just yet, but I feel it's up hill right now. Please please.

(already added som dirs to global path).

B.R. Ohlfsen

Running build steps for project application...
Configuration unchanged, skipping QMake step.
Starting: C:/Qt/2010_02_1/mingw/bin/mingw32-make.exe -w
mingw32-make: Entering directory `C:/Qt/2010_02_1/qt/examples/mainwindows/application'
C:/Qt/2010_02_1/mingw/bin/mingw32-make -f Makefile.Debug all
mingw32-make[1]: Entering directory `C:/Qt/2010_02_1/qt/examples/mainwindows/application'
g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -mthreads -Wl -Wl,-subsystem,windows -o debug\application.exe tmp/obj/debug_shared/main.o tmp/obj/debug_shared/mainwindow.o tmp/obj/debug_shared/moc_mainwindow.o tmp/obj/debug_shared/qrc_application.o -L"c:\Qt\2010_02_1\qt\lib" -L"c:\Programmer\SQLXML 4.0\bin\" -L"c:\Qt\2010_02_1\qt\lib" -lmingw32 -lqtmaind -lQtGuid4 -lQtCored4
mingw32-make[1]: Leaving directory `C:/Qt/2010_02_1/qt/examples/mainwindows/application'
mingw32-make: Leaving directory `C:/Qt/2010_02_1/qt/examples/mainwindows/application'
tmp/obj/debug_shared/main.o: In function `Z5qMainiPPc':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/main.cpp:51: undefined reference to `_imp___ZN12QApplicationC1ERiPPci'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/main.cpp:52: undefined reference to `_imp___ZN16QCoreApplication19setOrganizationNameE RK7QString'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/main.cpp:53: undefined reference to `_imp___ZN16QCoreApplication18setApplicationNameER K7QString'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/main.cpp:56: undefined reference to `_imp___ZN12QApplication4execEv'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/main.cpp:56: undefined reference to `_imp___ZN12QApplicationD1Ev'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/main.cpp:56: undefined reference to `_imp___ZN12QApplicationD1Ev'
tmp/obj/debug_shared/main.o: In function `QString':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/../../../include/QtCore/../../src/corelib/tools/qstring.h:413: undefined reference to `_imp___ZN7QString16fromAscii_helperEPKci'
tmp/obj/debug_shared/main.o: In function `~QString':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/../../../include/QtCore/../../src/corelib/tools/qstring.h:869: undefined reference to `_imp___ZN7QString4freeEPNS_4DataE'
tmp/obj/debug_shared/main.o: In function `~MainWindow':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.h:55: undefined reference to `_imp___ZN11QMainWindowD2Ev'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.h:55: undefined reference to `_imp___ZN11QMainWindowD2Ev'
tmp/obj/debug_shared/mainwindow.o: In function `MainWindow':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:49: undefined reference to `_imp___ZN11QMainWindowC2EP7QWidget6QFlagsIN2Qt10W indowTypeEE'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:52: undefined reference to `_imp___ZN14QPlainTextEditC1EP7QWidget'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:53: undefined reference to `_imp___ZN11QMainWindow16setCentralWidgetEP7QWidge t'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:63: undefined reference to `_imp___Z13qFlagLocationPKc'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:63: undefined reference to `_imp___Z13qFlagLocationPKc'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:63: undefined reference to `_imp___ZNK14QPlainTextEdit8documentEv'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/mainwindow.cpp:63: undefined reference to `_imp___ZN7QObject7connectEPKS_PKcS1_S3_N2Qt14Conn ectionTypeE'
undefined reference to `QWidget::changeEvent(QEvent*)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xc0): undefined reference to `QWidget::metric(QPaintDevice::PaintDeviceMetric) const'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xc4): undefined reference to `QWidget::inputMethodEvent(QInputMethodEvent*)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xc8): undefined reference to `QWidget::inputMethodQuery(Qt::InputMethodQuery) const'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xcc): undefined reference to `QWidget::focusNextPrevChild(bool)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xd0): undefined reference to `QWidget::styleChange(QStyle&)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xd4): undefined reference to `QWidget::enabledChange(bool)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xd8): undefined reference to `QWidget::paletteChange(QPalette const&)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xdc): undefined reference to `QWidget::fontChange(QFont const&)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xe0): undefined reference to `QWidget::windowActivationChange(bool)'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xe4): undefined reference to `QWidget::languageChange()'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xe8): undefined reference to `QMainWindow::createPopupMenu()'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0xfc): undefined reference to `non-virtual thunk to QWidget::devType() const'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0x100): undefined reference to `non-virtual thunk to QWidget::paintEngine() const'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0x104): undefined reference to `non-virtual thunk to QWidget::getDC() const'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0x108): undefined reference to `non-virtual thunk to QWidget::releaseDC(HDC__*) const'
tmp/obj/debug_shared/moc_mainwindow.o:moc_mainwindow.cpp:(.rdata$_ZTV10 MainWindow[vtable for MainWindow]+0x10c): undefined reference to `non-virtual thunk to QWidget::metric(QPaintDevice::PaintDeviceMetric) const'
tmp/obj/debug_shared/moc_mainwindow.o: In function `~MainWindow':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/tmp/moc/debug_shared//../../../mainwindow.h:55: undefined reference to `_imp___ZN11QMainWindowD2Ev'
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/tmp/moc/debug_shared//../../../mainwindow.h:55: undefined reference to `_imp___ZN11QMainWindowD2Ev'
tmp/obj/debug_shared/qrc_application.o: In function `Z26qInitResources_applicationv':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/tmp/rcc/debug_shared/qrc_application.cpp:636: undefined reference to `_imp___Z21qRegisterResourceDataiPKhS0_S0_'
tmp/obj/debug_shared/qrc_application.o: In function `Z29qCleanupResources_applicationv':
C:\Qt\2010_02_1\qt\examples\mainwindows\applicatio n/tmp/rcc/debug_shared/qrc_application.cpp:645: undefined reference to `_imp___Z23qUnregisterResourceDataiPKhS0_S0_'
c:/qt/2010_02_1/mingw/bin/../lib/gcc/mingw32/4.4.0/../../../libmingw32.a(main.o):main.c:(.text+0x104): undefined reference to `WinMain@16'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\application.exe] Error 1
mingw32-make: *** [debug-all] Error 2
Exited with code 2.
Error while building project application
When executing build step 'Make'

**schnitzel** · 22nd February 2010, 22:41

can you show us your current path?
Also, start the Qt Command Prompt and paste what is printed to the console.

**wysota** · 22nd February 2010, 22:58

What is "c:\Programmer\SQLXML 4.0\bin"? How did it end up in your linker path?

**ohlfsen** · 23rd February 2010, 09:23

Wow. Thanks for your swift replies.

The path taken from Projekt->Run settings->Run environment is

C:\Qt\2010_02_1\qt\bin;C:\Programmer\PC Connectivity Solution\;C:\Programmer\RSA SecurID Token Common;C:\Programmer\ThinkPad\Utilities;C:\WINDOWS \system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\P rogrammer\ZipGenius 6\;C:\Programmer\ATI Technologies\ATI.ACE\Core-Static;C:\Programmer\FÃ¦lles filer\Lenovo;C:\Programmer\Intel\Wireless\Bin\;C:\ Programmer\Microsoft SQL Server\80\Tools\Binn\;C:\Programmer\Microsoft SQL Server\90\DTS\Binn\;C:\Programmer\Microsoft SQL Server\90\Tools\binn\;C:\Programmer\Microsoft SQL Server\90\Tools\Binn\VSShell\Common7\IDE\;C:\Progr ammer\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\;C:\Programmer\jZi p;C:\Programmer\ThinkPad\ConnectUtilities;C:\Progr ammer\Bazaar;C:\Programmer\Java\jre1.6.0_07\bin\cl ient;C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727 ;C:\Programmer\Global Refund\Shop Assistant;C:\Programmer\OPOS\Epson2;c:\python26;C: \Programmer\IronPython 2.0.1;c:\progs\cmd;C:\Programmer\TortoiseSVN\bin;C :\Qt\2010_02_1\qt\bin;C:\Qt\2010_02_1\bin;C:\Qt\20 10_02_1\mingw\bin

The path from the QT command prompt is

C:\Qt\2010_02_1\qt\bin;C:\Qt\2010_02_1\bin;C:\Qt\2 010_02_1\mingw\bin;C:\WINDOWS\System32

The "c:\Programmer\SQLXML 4.0\bin" is in an environment variable called LIB. I didn't put it there, and don't know what it's for. It's the only entry in the LIB environment variable.

**wysota** · 23rd February 2010, 15:12

I don't have such entry in my examples/mainwindows/application project file. Are you sure you didn't change any files? What exactly did you do to download, install Qt and build the example?

**schnitzel** · 23rd February 2010, 16:59

I'm not an expert but one other thing you could try is to build the app from the Qt command prompt - at least that will give you a 'clean' environment and path.
There are these weird spaces in the path and also in the build log - is it a non-english OS (although that shouldn't matter).
I also noticed visual studio 8 is in the path. I would put all Qt related entries at the front of the path, not at the end. Of course this won't matter if you build from the Qt command prompt.

**Tvt204** · 23rd February 2010, 23:04

I had a similar problem to yours. (here)

My solution was to move the entire examples directory from its location under C:\Nokia\Qt\2009.05\qt\examples to C:\Nokia\Qt\examples and then just open the examples like I would any other project. You could probably move this directory almost anywhere.

Does this work-around work for you?

**franz** · 24th February 2010, 07:04

Is that a space in the MinGW path?

[edit]Oh, typo.

**ohlfsen** · 24th February 2010, 22:22

Thank you all for your interest and your help. Really appreciate it.

The advice from Tvt204 did the trick. Weird but it works. Thanks Tvt204.

By the way c:\Programmer\SQLXML 4.0\bin has to do with my Microsoft SQL server installation and then strange character in my path not easily identifyable is an underscore _.

Kindest regards
Ohlfsen