Can't compile sample - Mac OS X 10.5, latest QT SDK download

Hi. This is my second shot at Qt. I tried a year ago and gave up. Similar errors as now. Hopefully, I can get it working this time.

I've just downloaded the latest SDK. I'm running current Leopard. Xcode 3.1 is installed and I use it for Java, C and C++ development all the time.

For the life of me, I cannot compile the sample on page 4 of the Qtbook (C++ GUI Programming with Qt4, 2nd Edition). ("Hello QT!)

I've entered the program into a qt_test2.cpp file in a qt_test2 folder. (~/Xcode/qt_test2/qt_test2.cpp).

I run qmake while in that folder:

Code:

---

qmake -project

---

and it creates qt_test2.pro. Now, I have 2 files in /qt_test2.

Then, I run:

Code:

---

qmake -spec macx-xcode qt_test2.pro

---

and the folder now contains:

Code:

---

rw-r--r--  1 toddburch  toddburch  600 Sep 28 21:33 Info.plist
-rw-r--r--  1 toddburch  toddburch  293 May  1  2008 qt_test2.cpp
-rw-r--r--  1 toddburch  toddburch  594 Sep 28 21:32 qt_test2.pro
drwxr-xr-x  5 toddburch  toddburch  170 Sep 28 21:33 qt_test2.xcodeproj

---

and the xcodeproj contains:

Code:

---

~/Xcode/qt_test2/qt_test2.xcodeproj toddburch $ ls -l
total 40
-rw-r--r--  1 toddburch  toddburch  11269 Sep 28 21:33 project.pbxproj
-rw-r--r--  1 toddburch  toddburch   3488 Sep 28 21:33 qt_makeqmake.mak
-rw-r--r--  1 toddburch  toddburch   2549 Sep 28 21:33 qt_preprocess.mak

---

Now, I've run qmake in "project mode" and then in "make mode". There's no .app,
which I expect, as I want to compile using Xcode. In Xcode, I open the qt_test2.xcodeproj file. (Project Screenshot attached).

I then click Build in Xcode and get lots of error in code that is not mine. Here's a summary in the other screenshot.

What am I doing wrong? Thanks, Todd.

So, I don't want to use Makefiles, but I figured I would try it while waiting for an answer. Here's the result. No bueno. (Note I created a new folder and source file)

Just before this Make attempt, I entered: qmake qt1.pro

Code:

---

~/Xcode/qt1 toddburch $ qmake -spec macx-g++ qt1.pro 
~/Xcode/qt1 toddburch $ ls -l
total 40
-rw-r--r--  1 toddburch  toddburch  10328 Sep 28 22:58 Makefile
-rw-r--r--  1 toddburch  toddburch    293 Sep 28 22:47 qt1.cpp
-rw-r--r--  1 toddburch  toddburch    589 Sep 28 22:55 qt1.pro
~/Xcode/qt1 toddburch $ make
g++ -c -pipe -g -gdwarf-2 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Qt4.5/mkspecs/macx-g++ -I. -I/Library/Frameworks/QtCore.framework/Versions/4/Headers -I/usr/include/QtCore -I/Library/Frameworks/QtGui.framework/Versions/4/Headers -I/usr/include/QtGui -I/usr/include -I. -I. -F/Library/Frameworks -o qt1.o qt1.cpp
/Developer/Tools/Qt/moc -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Qt4.5/mkspecs/macx-g++ -I. -I/Library/Frameworks/QtCore.framework/Versions/4/Headers -I/usr/include/QtCore -I/Library/Frameworks/QtGui.framework/Versions/4/Headers -I/usr/include/QtGui -I/usr/include -I. -I. -F/Library/Frameworks -D__APPLE__ -D__GNUC__ /Library/Frameworks/QtGui.framework/Versions/4/Headers/qapplication.h -o moc_qapplication.cpp
g++ -c -pipe -g -gdwarf-2 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Qt4.5/mkspecs/macx-g++ -I. -I/Library/Frameworks/QtCore.framework/Versions/4/Headers -I/usr/include/QtCore -I/Library/Frameworks/QtGui.framework/Versions/4/Headers -I/usr/include/QtGui -I/usr/include -I. -I. -F/Library/Frameworks -o moc_qapplication.o moc_qapplication.cpp
moc_qapplication.cpp: In member function ‘virtual int QApplication::qt_metacall(QMetaObject::Call, int, void**)’:
moc_qapplication.cpp:110: error: invalid use of undefined type ‘struct QApplicationPrivate’
/Library/Frameworks/QtCore.framework/Headers/qobject.h:295: error: forward declaration of ‘struct QApplicationPrivate’
moc_qapplication.cpp:120: error: invalid use of undefined type ‘struct QIcon’
/Library/Frameworks/QtGui.framework/Versions/4/Headers/qapplication.h:72: error: forward declaration of ‘struct QIcon’
make: *** [moc_qapplication.o] Error 1
~/Xcode/qt1 toddburch $

---

Here's my source.

Code:

---

#include </Library/Frameworks/QtGui.framework/headers/QApplication>
#include </Library/Frameworks/QtGui.framework/headers/QLabel> 
 
int main (int argc, char * argv[]) {
	QApplication app(argc, argv) ; 
	QLabel * label = new QLabel("Hello Todd") ; 
	label->show() ; 
    return app.exec() ; 
}

---

User error? Install error? Qt error?

For as world class as Qt is made out to be, I'm not impressed yet.

If the graphic is difficult to read, attached is a copy and paste of the build errors from Xcode.
The errors apears to be in the moc_qapplication, not my code.

Could this be an issue related to installing 4.5 on top of 4.3.3?

I did not delete the previous version - I made an assumption that the install would be smart enough to do the right thing.

Congratulations on one of the longest monologues I've seen in a forum ;)

Looks like it is not finding the headers. I'm not an OS X user, but I would assume that you do not need to spell out the full path to the headers; qmake and gcc take care of the path to find them. The stereotypical "Hello, World" looks like:

Code:

---

#include <QApplication>
#include <QLabel> 
 
int main (int argc, char * argv[]) {
    QApplication app(argc, argv) ; 
    QLabel * label = new QLabel("Hello Todd") ; 
    label->show() ; 
    return app.exec() ; 
}

---

Try that for starters.

Code:

---

qmake -v

---

will tell what version of Qt it thinks it is using. The Makefile should be using the same version.

Thanks Chris.

When not specifying the full path and just
coding as you've shown, I get the same
exact errors.

I can check the version again to confirm
when I get back in town. Thanks

I uninstalled Qt and reinstalled. Same errors.

Code:

---

~/Xcode/qt_test2 toddburch $ qmake -v
QMake version 2.01a
Using Qt version 4.5.2 in /Library/Frameworks

---

What next? Please help. Thanks, Todd