undefined error when drived from QAbstractItemViewPrivate

thomas.sksksks

Hi experts,

I am trying to do a CustomTreeView derived from QAbstractItemView with CustomTreeViewPrivate derived from QAbstractItemViewPrivate.
Here is my project

---
CustomTreeView.pro
----
QT   += gui widgets core widgets-private gui-private core-private

SOURCES += main.cpp\
        mainwindow.cpp \
    CustomTreeView.cpp 

HEADERS  += mainwindow.h \
    CustomTreeView.h \
    CustomTreeView_p.h


------
------------------------------------------------------------
-----
CustomTreeView_p.h
-----
class CustomTreeViewPrivate: public QAbstractItemViewPrivate {
...
}

------
------------------------------------------------------------
-----
CustomTreeView.h
-----
class CustomTreeView: public QAbstractItemView {
Q_OBJECT
public:
CustomTreeView(QWidget* parent) : QAbstractItemView (*new CustomTreeViewPrivate,  parent) {
...
}
...
...
}

When compiling the project, it reports a lot "undefined symbol error" like below
error: undefined symbol: QAbstractItemViewPrivate::QAbstractItemViewPrivate
error: undefined symbol: QAbstractItemViewPrivate::~QAbstractItemViewPrivate
.....

Do you know how to fix these errors ?

VRonin

Private symbols are not exported by the pre-compiled Qt libraries. You need to compile Qt yourself either:

defining QT_BUILD_INTERNAL (i.e use the -developer-build configure option) to export private symbols
build Qt as a static library (i.e use the -static configure option)

QT += *-private only deals with the headers, it can't export more symbols