[Qtwebengine] Qt 5.4.2 MSVC WebEngine use

Kai Koehne Kai.Koehne at qt.io
Fri Apr 22 08:41:12 CEST 2016

> -----Original Message-----
> From: QtWebEngine [mailto:qtwebengine-bounces+kai.koehne=qt.io at qt-
> project.org] On Behalf Of Jonathan Delfour
> Sent: Thursday, April 21, 2016 6:49 PM
> To: qtwebengine at qt-project.org
> Subject: [Qtwebengine] Qt 5.4.2 MSVC WebEngine use
> Hi,
> I have a simple C++ (non Qt Quick) application (that does not use .pro
> mechanism) built against the Qt 5.4.2 x64 build (with openGL support).
> As soon as I use the QWebEngineView object in my application, it fails to load
> with a message “Specified procedure could not be found”.
> With the help of gflags, it seems it fails to find the following demangled
> procedure:
>         public: __cdecl QOpenGLWidget::QOpenGLWidget(class QWidget *
> __ptr64,class QFlags<enum Qt::WindowType>) __ptr64

This should be defined in Qt5Widgets (at least if you really configured Qt
with -opengl).

> I am not sure to understand why this cannot be found, I have put for the
> sake of testing all the dll in Qt_DIR\bin next to the application, and all the
> plug-ins.

You should try to open the app in Dependency Walker
(depends.exe, http://www.dependencywalker.com). It will first and foremost
show you which libraries are picked up. But it also has a 'Profiler' mode
where you can launch the application, and it will show you in much detail
how also dynamc plugins etc are loaded.

> [...]
> I wanted to try a simple example in Qt Creator 3.6.1 but it complains: Project
> ERROR: Unknown module(s) in QT: webenginewidgets

This hints that the Qt installation is broken, or that you are using the wrong 
Qt (check the 'kit' selected).

> The browser.exe example runs fine (built with visual studio)
> Do you have any idea of what is wrong?

Just that something in your installation/setup is botched ;)



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