Unresolved external symbol "staticMetaObject"

[sr71]

Totem, I just used -no-webkit to speed up the build -- do you mean webkit should be build for dependency? Thanks.

[dpatel]

sr71, I am also getting same linker error. My setup is VS2005 + Qt 4.6.2 (precompiled libs that Qt provides)

I don't think -no-webkit is an issue.

I found that if I remove Q_OBJECT from .h file the application compiles ok. Also I exported the project to .pro and compiling it in Qt Creator also works fine (this is with Q_OBJECT) in .h file. I don't think that removing Q_OBJECT is a solution to this issue. Anybody???

[jiapei100]

My post is here
http://www.qtcentre.org/threads/3202...tPlot-staticMe

Probably, I've got exactly the same problem as yours.
Did you solve this problem already? If so, please do give me a hand.

Thank you very much in advance.

Best Regards
JIA

[jiapei100]

Yes, after removing

Q_OBJECT

from my .h file, I can get my application compiled and built.
However, when I ran it, I confronted another issue "Seg fault on program start", as posted here:
http://www.osgeo.org/pipermail/qgis-...ch/006230.html


Well, may I ask:

1)
What is the purpose of

Q_OBJECT

Q_OBJECT

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after my class definition? For example, my class looks like:

class CDataPlot : public QwtPlot
{
    Q_OBJECT
private:
....
};

class CDataPlot : public QwtPlot
{
    Q_OBJECT
private:
....
};

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What is

Q_OBJECT

used for?


2)
Without Q_OBJECT, I obtained this warning and the program won't start.

Warning: QObject::connect: Connecting from COMPAT signal (QAction::activated())

With Q_OBJECT, I obtained the following error compilation message:

error LNK2001: unresolved external symbol "public: static struct QMetaObject const QwtPlot::staticMetaObject" (?staticMetaObject@QwtPlot@@2UQMetaObject@@B)

3) My Environments:
WindowsXP+Visual Studio 2008+qt-vs-addin-1.1.5.exe+qwt-5.2.1

4)
In addition, under Ubuntu 10.04, the same program runs perfectly.

So, can anybody help please?

Best Regards
JIA