Undefined references during build of plugin in Qt Creator - qt

Question

I'm trying to create plugin for Qt Creator, so I simply selected new file or project/Libraries/QtCreator plugin. I've specified the sources for Qt Creator as well as build of Qt Creator. When I've tried to build it I'm getting the following three errors:
*C:\...\mypluginplugin.cpp:20: error:
undefined reference to `vtable for MyPlugin::Internal::MyPluginPlugin'* //this is constructor
*C:\...\mypluginplugin.cpp:25: error:
undefined reference to `vtable for MyPlugin::Internal::MyPluginPlugin'* //this is destructor
C:\...\mypluginplugin.hpp:13: error:
undefined reference to `MyPlugin::Internal::MyPluginPlugin::staticMetaObject' //when I double click
on this error it moves me to my .hpp file to the Q_OBJECT macro:
This is my code:
namespace MyPlugin {
namespace Internal {
class MyPluginPlugin : public ExtensionSystem::IPlugin
{
Q_OBJECT// the last, third error moves me here
public:
MyPluginPlugin();
~MyPluginPlugin();
bool initialize(const QStringList &arguments, QString *errorString);
void extensionsInitialized();
ShutdownFlag aboutToShutdown();
private slots:
void triggerAction();
};
} // namespace Internal
} // namespace MyPlugin
Any idea how to solve this problem?
//EDIT
#include "mypluginplugin.hpp"
#include "mypluginconstants.hpp"
#include <coreplugin/icore.h>
#include <coreplugin/icontext.h>
#include <coreplugin/actionmanager/actionmanager.h>
#include <coreplugin/actionmanager/command.h>
#include <coreplugin/actionmanager/actioncontainer.h>
#include <coreplugin/coreconstants.h>
#include <QAction>
#include <QMessageBox>
#include <QMainWindow>
#include <QMenu>
#include <QtPlugin>
using namespace MyPlugin::Internal;
MyPluginPlugin::MyPluginPlugin()
{
// Create your members
}
MyPluginPlugin::~MyPluginPlugin()
{
// Unregister objects from the plugin manager's object pool
// Delete members
}
bool MyPluginPlugin::initialize(const QStringList &arguments, QString *errorString)
{
// Register objects in the plugin manager's object pool
// Load settings
// Add actions to menus
// Connect to other plugins' signals
// In the initialize method, a plugin can be sure that the plugins it
// depends on have initialized their members.
Q_UNUSED(arguments)
Q_UNUSED(errorString)
QAction *action = new QAction(tr("MyPlugin action"), this);
Core::Command *cmd = Core::ActionManager::registerAction(action, Constants::ACTION_ID,
Core::Context(Core::Constants::C_GLOBAL));
cmd->setDefaultKeySequence(QKeySequence(tr("Ctrl+Alt+Meta+A")));
connect(action, SIGNAL(triggered()), this, SLOT(triggerAction()));
Core::ActionContainer *menu = Core::ActionManager::createMenu(Constants::MENU_ID);
menu->menu()->setTitle(tr("MyPlugin"));
menu->addAction(cmd);
Core::ActionManager::actionContainer(Core::Constants::M_TOOLS)->addMenu(menu);
return true;
}
void MyPluginPlugin::extensionsInitialized()
{
// Retrieve objects from the plugin manager's object pool
// In the extensionsInitialized method, a plugin can be sure that all
// plugins that depend on it are completely initialized.
}
ExtensionSystem::IPlugin::ShutdownFlag MyPluginPlugin::aboutToShutdown()
{
// Save settings
// Disconnect from signals that are not needed during shutdown
// Hide UI (if you add UI that is not in the main window directly)
return SynchronousShutdown;
}
void MyPluginPlugin::triggerAction()
{
QMessageBox::information(Core::ICore::mainWindow(),
tr("Action triggered"),
tr("This is an action from MyPlugin."));
}
Q_EXPORT_PLUGIN2(MyPlugin, MyPluginPlugin)

Answer 1

I figured out what happened. Ok, here is the solution for others - qtcreator simply didn't attach .hpp files to the project, yet there were created. After adding those .hpp files via add existing files, it builds fine now.