[Marble-devel] Using Marble library with Qt Embedded
Jeremie Scheer
jeremie.scheer at armadeus.com
Thu May 24 09:39:47 UTC 2012
Hi,
I tried to search a bit further to find what can cause the issue. When I
put a breakpoint in Qt sources on the QMutex error message, if I follow
up the call chain from the breakpoint, I find the constructor of
QSettings that may be in cause.
And in Marble, I found that QSettings is instanciated 2 times in
qtmain.cpp (main method) and QtMarbleConfigDialog.cpp (that is also
initialized in main() at first).
The only strange thing is that I directly use MarbleWidget in Marble
library, so Marble main() method must not be called and both QSettings
never instanciated...
Regards,
Jérémie SCHEER
On 05/23/2012 04:49 PM, Jeremie Scheer wrote:
> In fact, it is even not loading the map theme, as it crashes before
> the first instruction of the main() method : if I put breakpoints in
> main(), it doesn't break on them, even at the first instruction, it
> simply runs and crashes...
>
> Regards,
> --
> Jérémie Scheer
> Software Engineer
> Tel: +33 (0)9 72 29 41 44
> Fax: +33 (0)9 72 28 79 26
> Armadeus Systems - A new vision of the embedded world
> http://www.armadeus.com
>
>
> On 05/23/2012 04:17 PM, Jeremie Scheer wrote:
>> I tried that also but I'm really not lucky : whatever the map theme I
>> choose to load in Marble widget, it crashes. So it doesn't seem to be
>> related neither.
>>
>> Regards,
>> --
>> Jérémie Scheer
>> Software Engineer
>> Tel: +33 (0)9 72 29 41 44
>> Fax: +33 (0)9 72 28 79 26
>> Armadeus Systems - A new vision of the embedded world
>> http://www.armadeus.com
>>
>>
>> On 05/23/2012 03:51 PM, Dennis Nienhüser wrote:
>>> Hi,
>>>
>>> can you try whether using the plain.dgml theme
>>> ("earth/plain/plain.dgml") instead of openstreetmap.dgml helps? This
>>> map theme does not have any texture layers. The texture layers make
>>> use of threads as well.
>>>
>>> Regards,
>>> Dennis
>>>
>>> Am 23.05.2012 15:36, schrieb Jeremie Scheer:
>>>> Hi,
>>>>
>>>> Thank you for your answer.
>>>>
>>>> Unfortunately it doesn't seem to be the plugins that cause the
>>>> thread issue.
>>>> I tried what you suggested me to do but I always run into the same
>>>> error with QMutex.
>>>>
>>>> It is the same error that makes my application crash in a Qt
>>>> Virtual Framebuffer or on ARM platform.
>>>>
>>>> Regards,
>>>> --
>>>> Jérémie Scheer
>>>> Software Engineer
>>>> Tel: +33 (0)9 72 29 41 44
>>>> Fax: +33 (0)9 72 28 79 26
>>>> Armadeus Systems - A new vision of the embedded world
>>>> http://www.armadeus.com
>>>>
>>>>
>>>> On 05/23/2012 01:25 PM, Dennis Nienhüser wrote:
>>>>> I started looking into it yesterday but Qt Embedded wasn't
>>>>> compiling on my system due to some known bug where glib and webkit
>>>>> interfere.
>>>>>
>>>>> I'd suggest trying to move all marble plugins away first (just
>>>>> remove them from lib/marble/plugins in the installation directory
>>>>> of marble) and see if that changes things. Might be some threading
>>>>> issue, the parser plugins working on startup for example run in
>>>>> their own thread each.
>>>>>
>>>>> Regards,
>>>>> Dennis
>>>>>
>>>>> Am 23.05.2012 11:12, schrieb Jeremie Scheer:
>>>>>> Any idea ?
>>>>>>
>>>>>> Is it simply possible to use Marble in a Qt Virtual Framebuffer
>>>>>> with Qt Embedded ?
>>>>>>
>>>>>> I think it should be, because I found this link on the Internet
>>>>>> http://wm161.net/2008/07/26/marble-under-qtembedded-linux/ . A
>>>>>> little bit old but it shows that Marble could run under Qt Embedded.
>>>>>>
>>>>>> I can't see what is the origin of the bug because I've no QThread
>>>>>> or QMutex in my application. It can only come from the
>>>>>> compilation of Marble...
>>>>>>
>>>>>> My Qt Embedded is configured like this:
>>>>>>
>>>>>> configure -embedded x86_64 -no-cups -no-nis -depths 16,18
>>>>>> -qvfb -prefix /usr/local/Trolltech/QtEmbedded-4.7.2 -glib
>>>>>> -confirm-license -qt-sql-sqlite
>>>>>>
>>>>>>
>>>>>> And I configure Marble to build against Qt like this:
>>>>>>
>>>>>> PATH=/usr/local/Trolltech/QtEmbedded-4.7.2/bin:$PATH cmake
>>>>>> -DQTONLY=ON ../marble_qvfb/
>>>>>>
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Jérémie SCHEER
>>>>>>
>>>>>>
>>>>>> On 05/22/2012 04:13 PM, Jeremie Scheer wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I'm currently trying to use a Marble library built against _Qt
>>>>>>> 4.7.4 Embedded x86_.
>>>>>>>
>>>>>>> My application using Marble is built against the same Qt and is
>>>>>>> running in a Qt Virtual Framebuffer with a QWS Server.
>>>>>>>
>>>>>>> In the Qt project file, I simply added : /LIBS = -lmarblewidget/
>>>>>>> to link with Marble. And when running the application, I defined
>>>>>>> the environment variable /LD_LIBRARY_PATH=/usr/local/lib/ where
>>>>>>> Marble libraries are installed.
>>>>>>>
>>>>>>> The problem is : when I run the application, before any
>>>>>>> instruction can be executed, it crashes on :
>>>>>>>
>>>>>>> QMutex::lock: Deadlock detected in thread 0x7f1fe30bb740
>>>>>>>
>>>>>>>
>>>>>>> Here is my application code :
>>>>>>>
>>>>>>> #include <QtGui/QApplication>
>>>>>>> #include <marble/MarbleWidget.h>
>>>>>>> #include <marble/MarbleModel.h>
>>>>>>> #include <marble/global.h>
>>>>>>> #include <QWSServer>
>>>>>>>
>>>>>>> using namespace Marble;
>>>>>>>
>>>>>>> int main(int argc, char** argv)
>>>>>>> {
>>>>>>> QApplication app(argc,argv);
>>>>>>> QWSServer *sw = QWSServer::instance ();
>>>>>>>
>>>>>>> // Create a Marble QWidget without a parent
>>>>>>> MarbleWidget *mapWidget = new MarbleWidget();
>>>>>>>
>>>>>>> // Load the OpenStreetMap map
>>>>>>>
>>>>>>> mapWidget->setMapThemeId("earth/openstreetmap/openstreetmap.dgml");
>>>>>>> mapWidget->setProjection(Mercator);
>>>>>>>
>>>>>>> mapWidget->show();
>>>>>>>
>>>>>>> return app.exec();
>>>>>>> }
>>>>>>>
>>>>>>>
>>>>>>> If I build the same application (without the QWS Server) and
>>>>>>> Marble against Qt x86, it works well.
>>>>>>>
>>>>>>> Is there anything I did wrong with Qt Embedded ?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> --
>>>>>>> Jérémie Scheer
>>>>>>> Software Engineer
>>>>>>> Tel: +33 (0)9 72 29 41 44
>>>>>>> Fax: +33 (0)9 72 28 79 26
>>>>>>> ARMadeus Systems - A new vision of the embedded world
>>>>>>> http://www.armadeus.com
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Marble-devel mailing list
>>>>>>> Marble-devel at kde.org
>>>>>>> https://mail.kde.org/mailman/listinfo/marble-devel
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Jérémie Scheer
>>>>>> Software Engineer
>>>>>> Tel: +33 (0)9 72 29 41 44
>>>>>> Fax: +33 (0)9 72 28 79 26
>>>>>> ARMadeus Systems - A new vision of the embedded world
>>>>>> http://www.armadeus.com
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Marble-devel mailing list
>>>>>> Marble-devel at kde.org
>>>>>> https://mail.kde.org/mailman/listinfo/marble-devel
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>
>>>>
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--
Jérémie Scheer
Software Engineer
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26
Armadeus Systems - A new vision of the embedded world
http://www.armadeus.com
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