Issue with icons and static build

[ceraolo]

I came across an issue regarding icons and static build.
Consider the following tiny program below.

If it is compiled with a dynamic build the icon in the toolButton is shown.
If it is compiled with static built it is not.

This behavior does not change whether I comment the QT_INIT_RESOURCE or not.
Can anyone suggest a solution so that I can see the icon after a static build also?
I tried using Qt 5.2.1 and MingGW

Thank you.



******* test.pro file **********

QT       += core gui  widgets
 
TARGET = test
TEMPLATE = app
 
SOURCES += main.cpp
HEADERS  += mainwindow.h
RESOURCES += \
    Images.qrc

QT       += core gui  widgets

TARGET = test
TEMPLATE = app

SOURCES += main.cpp
HEADERS  += mainwindow.h
RESOURCES += \
    Images.qrc

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********** main.c file **********

#include "mainwindow.h"
#include <QApplication>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}
 
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
  Q_INIT_RESOURCE(Images);
  tBtn = new QToolButton(this);
  tBtn->setIcon(QIcon(":/buttons/arrowUp.ico"));
  move(0,0);
}
 
MainWindow::~MainWindow()
{
}

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}


MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
  Q_INIT_RESOURCE(Images);
  tBtn = new QToolButton(this);
  tBtn->setIcon(QIcon(":/buttons/arrowUp.ico"));
  move(0,0);
}

MainWindow::~MainWindow()
{
}

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********** Images.qrc file **********

<RCC>
    <qresource prefix="/buttons">
        <file>arrowUp.ico</file>
    </qresource>
</RCC>

<RCC>
    <qresource prefix="/buttons">
        <file>arrowUp.ico</file>
    </qresource>
</RCC>

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[budda]

ahhh maybe try tBtn->show();
and #include <QIcon> couldn't hurt

and if you grab the .dll's you need the imageformats folder to be a subdirectory of your application,
including the dico.dll in it

(if you're using windows)

[ceraolo]

I will try your suggestions.
When in trouble every suggestion, even those that one does not understand well, must be tried.
but:
- the button IS shown, only the icon is missing
- the icon IS displayed when the program is compiled dynamically (run from Qt creator). Only when static linked the icon is missing.
- if some dll were missing the program would not be linked. Indeed it is linked but somehow Qt "forgets" to link the icons.

I think there is some sort of a bug here, but I'm sure there must be a workaround for this: I cannot believe that people can live with Qt not being able to display icons when programs are statically linked.

[ceraolo]

Well,
I've solved this.
I needed to statically link the Qt plugin for icons.
It was just the matter of adding to the .pro file the following row:
QTPLUGIN += qico

Regards.