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Cannot Load Library Undefined Symbol Qt

Ok, for this time I can remove "Id" stuff...but if I need to share some concrete methods (which the pkServer instance needs to know too) with all applications derived from pkApplication People Assignee: Erik Verbruggen Reporter: Vlad Seryakov Votes: 0 Vote for this issue Watchers: 0 Start watching this issue Dates Created: 26/Feb/10 8:48 PM Updated: 26/Aug/13 3:23 PM Resolved: 08/Mar/10 10:04 What movie is this? For those who will have this problem : I had an INCLUDEDIR line in my plugin's .pro file, I have removed it and now, the plugin works well. have a peek at this web-site

Select 2D data in a certain range Where do I drop off a foot passenger in Calais (P&O)? Add Answer Question Tools Follow 4 followers subscribe to rss feed Stats Asked: 2015-03-31 18:32:53 -0600 Seen: 609 times Last updated: Apr 20 Related questions Rqt plugin C++ undefined symbol rqt Since I did commented out all instances of QT ( Ui::MyPluginWidget ui_; QWidget* widget_; ) BUT LEFT Q_OBJECT in MyPlugin class this was the source of the problem. share|improve this answer answered Nov 2 '14 at 9:05 Bambou 287 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign http://stackoverflow.com/questions/31480066/qt-qlibrary-cannot-load-library-so-so-undefined-symbol-staticmetaobject

Oh, by the way, thanks for your help! ;) fullmetalcoder19th March 2009, 21:50if I need to share some concrete methods (which the pkServer instance needs to know too) with all applications But when starting rqt I can see plugin in Visualization menu. Reply Quote 0 ckakman last edited by Hi, You may consider defining an interface, e.g.

I changed one method signature and broke 25,000 other classes. By the way, the "pure interface" rule matters only if your plugins do not use Qt themselves (which may happen but is generally unlikely and not your case obviously), otherwise inheriting Maybe but a more detailed explanation is needed (project layout, test you made, expected results, actual results and such...) fullmetalcoder18th March 2009, 19:58class pkApplicationBase : public QObject, public pkApplication { Q_OBJECT But this shouldn't be an issue on Linux.

I don't think assuming gnu ld is a good thing, especially with the uncertain future of GNU libtools on BSD machines (due to GPLv3 resenting). moc is responsible for generating the staticMetaObject for classes which contain the Q_OBJECT Macro and are listed under the HEADERS section in the pro file. What is the output of `moc -v' ? " I suspect that 'const ScActionPlugin::staticMetaObject () const', returning a const pointer on a const object is optimized away as a const value http://stackoverflow.com/questions/14056149/qtplugin-cannot-load-library This patch is now in SVN.

Check out the FAQ! For those who will have this problem : I had an INCLUDEDIR line in my plugin's .pro file, I have removed it and now, the plugin works well. Is there a word for turning something into a competition? Could you please post here the following listings?

This is the problem. click for more info I'd rather not commit it since I'm not at a Linux box right now. ~0019750 cbradney (administrator) 2008-05-27 22:09 Can you please test with rev 12176 of 135svn? If you examine updatemanager.o with nm does it contain the _ZTI13UpdateMemento symbol? definition of the singleton interface class new definition of the Singleton class new definition of the plugin interface implementation of the setSingleton() member of the concrete plugin class implementing the plugin

The method instantiate returns a null pointer and the error string is : Cannot load library *library* : (*library*: undefined symbol: _ZN7iPlugin16staticMetaObjectE) Here is the interface iPlugin.h : #ifndef IPLUGIN_H #define Check This Out But, i noticed that there's a pkg that's using CMAKE and Qt4. Browse other questions tagged c++ qt or ask your own question. What about using QLibrary instead of QPluginLoader?

How Did The Dred Scott Decision Contribute to the Civil War? You can afford to use "semi-abstract" classes as base class for plugins because both your app and the plugin links to Qt libs dynamically (or any other shared lib providing classes This is the body of loadApps method (which is very similar to Qt documentation one and I think the problem is not here): QList pkServer::loadApps() { QList loaded_apps; QDir pluginsDir(this->applicationDirPath()); foreach Source With this method the server should load and startup all plugins (third-party applications).

Also ldd /home/rob/projects/Test/devel/lib//libgps_plot.so does not show any missing libs From above error I try to grep for strings ~/projects/Test/devel/lib$ strings libgps_plot.so | grep _ZTVN8gps_plot9GPSPluginE _ZTVN8gps_plot9GPSPluginE _ZTVN8gps_plot9GPSPluginE nm -u libgps_plot.so | grep Will try to see what happens. ~0019395 vince (reporter) 2008-04-06 22:13 Ok, that's it. Why won't curl download this link when a browser will?

Just call the non-static virtual members via the pointer.

I get error message when Main application loads the library. "undefined symbol". new definition of the plugin interface @#ifndef MODULEINTERFACE_H #define MODULEINTERFACE_H #include #include #include "/home/ckurdu/Documents/my_works/C++/qt/tests/loadplugintest/loadplugin/singletoninterface.h" class ModuleInterface { public: virtual ~ModuleInterface() {} virtual QString display(QString) = 0; virtual QString execute(QString) If I add implementation file(singleton.cpp) to plugin , loadded plugin use own singleton code not the main application. The OK or FAIL column Counterexample to Corollary of Banach-Steinhaus?

What Qt4 version are you using? Or, of course, just not care and assume GNU ld (*gasp*) on UNIX platforms. As a result, your viewing experience will be diminished, and you have been placed in read-only mode. have a peek here How to make figure bigger in subfigures when width?

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed It's interesting that linking back to the executable has generally worked fine on most platforms in the absence of this flag. I'm stuck on it for about 6 hours, I'm going crazy.Thanks in advanceEDIT : I moved on Qt5, using Q_PLUGIN_METADATA(IID "Project.plug_text") in my class declaration and deleting Q_EXPORT_PLUGIN2(plug_text, TextPlugin) of the