Undefined symbol: _ZTI13QOpenGLWidget when loading my shared lib

XdoctorwhoZ

Hello,

I am on ubuntu 14.04, Qt5.4
I am trying to create a shared library with a class derived from QOpenGLWidget.

The compilation finish with success. But when I load this library (libviewer3d.so) with QLibrary I get an error.

@libviewer3d.so: undefined symbol: _ZTI13QOpenGLWidget@

My .pro

@TARGET = viewer3d

TEMPLATE = lib

QT += core gui widgets qml

CONFIG += c++11 release shared

unix {
LIBS += -lGLU -lGL
}

SOURCES += src/Viewer.cpp

HEADERS += src/Viewer.hpp

INCLUDEPATH += src
@

Moreover when I use the Viewer class in an application, like in the example, it works.

Is-there a flag that I must append in the .pro?

Thanks for your help.

tarod.net

Try to add in your .pro:

QT += opengl

XdoctorwhoZ

Thanks for the reply.
I tried this too but it did not work. ( new QOpenGLWidget does not depend on opengl module )

I made some tests with new opengl widgets:
QOpenGLWidget and QOpenGLWindow give me the described error.

When I made my own opengl window with QWindow and QOpenGLFunctions, it works.
When I used the old QGLWidget is works too.

Well I decide to run with QGLWidget again... :-) i going to wait for an improvement of the new classes.

Thanks again.

tarod.net

Great.

Take care.