[SOLVED] DEPENDPATH and INCLUDEPATH

QMartin

Hello guys

I'm having trouble with the .pro file. I have one external sub-classed QDialog and I want to start it when I select one action from the menu bar. When in my .pro file I specify the INCLUDEPATH with the HEADERS directory like this:

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

Project created by QtCreator 2012-11-28T09:23:03

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

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = myApp
TEMPLATE = app

INCLUDEPATH = /home/martin/myDialog

SOURCES += main.cpp
mainwindow.cpp
/home/martin/myDialog/myDialog.cpp

RESOURCES = resources.qrc

HEADERS += mainwindow.h
myDialog.h@

I get the next message 4 times after compiling:

@undefined reference to 'vtable for myDialog'@

I know its something about the linker, but when I specify the .pro like this:

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

Project created by QtCreator 2012-11-28T09:23:03

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

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = myApp
TEMPLATE = app

DEPENDPATH += /home/martin/myDialog

INCLUDEPATH = /home/martin/myDialog

SOURCES += main.cpp
mainwindow.cpp
myDialog.cpp

RESOURCES = resources.qrc

HEADERS += mainwindow.h
myDialog.h@

Everything works fine. I've read "qmake variables documentation":http://doc.qt.digia.com/qt/qmake-variable-reference.html but could not understand why I need the DEPENDPATH variable even though with INCLUDEPATH I specify headers and SOURCES afterwards. Any ideas?

Thanks in advance!

QMartin

Hello guys!

I think I found the answer. The reason: I read "this post":http://qt-project.org/forums/viewthread/11447 Then realized that myDialog.cpp had dependencies inside its directory (I suppose these are the moc files from Q_OBJECT of myDialog.cpp). So I need DEPENDPATH, to resolve dependencies where specified. When DEPENDPATH is not defined, no moc_myDialog.cpp file is created.

I think this is it, because it also worked with VPATH variable:
@
#-------------------------------------------------

Project created by QtCreator 2012-11-28T09:23:03

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

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = myApp
TEMPLATE = app

VPATH = /home/martin/myDialog

INCLUDEPATH = /home/martin/myDialog

SOURCES += main.cpp
mainwindow.cpp
myDialog.cpp

RESOURCES = resources.qrc

HEADERS += mainwindow.h
myDialog.h@

Regards.

Jeroentjehome

The error you described mostly comes from changes in your project file, but forgot to run the qmake again.
But if you fix did the trick I might be wrong ;-)