[Marble-devel] Using Marble library with Qt Embedded

Jeremie Scheer jeremie.scheer at armadeus.com
Wed May 23 14:49:36 UTC 2012 

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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