QScriptEngine: undefined reference to `recd::qInitResources_app()'

[mrbitmap]

Hello,
I'm following the example for the qScriptEngine from here:
https://doc.qt.io/qt-5/qtscript-script-helloscript-example.html
I've setup my project as follows: In the subdirs project my .pro file is that way:

# commnon stuff for everyone
include($$top_srcdir/recd2.pri)

CONFIG += c++11

TARGET = recd2
CONFIG += console
CONFIG -= app_bundle

RESOURCES += \
    hello_app.qrc

TEMPLATE = app

SOURCES += main.cpp \
    sapplication.cpp \

HEADERS += \
    sapplication.h \

# redefine a Makefile INSTALL_PROGRAM variable. We want to instal wit SUID bit
QMAKE_INSTALL_PROGRAM = install -m 4755 -p

target.path = /usr/bin
INSTALLS += target

debug
{
    message("Debug mode")
    QMAKE_CXXFLAGS += -DRECD_DEBUG
}

PRE_TARGETDEPS += \
    $$top_builddir/utils/libutils.a

In my .qrc file I've declared the script that way:

<RCC>
    <qresource prefix="/">
        <file>hello_app.js</file>
    </qresource>
</RCC>

The hello_app.js is in the same folder as .pro and .qrc files. So when I try to build the program I receive the message: : error: undefined reference to recd::qInitResources_hello_app(). From file with that content:

SApplication::SApplication(int &argc, char **argv)
    : QCoreApplication(argc, argv),
      m_setup(false)
{
    // proxy them to the plugins if needed
    s_argc = argc;
    s_argv = argv;
    if (temp_test_enable) {
        Q_INIT_RESOURCE(hello_app); // THE ERROR 

        QScriptEngine engine;
        QTranslator translator;
        translator.load("app_la");
        installTranslator(&translator);
        QString fname(":/scripts/app.js");
        QFile file(fname);
        file.open(QIODevice::ReadOnly);
        QTextStream strm(&file);
        QString content = strm.readAll();
        file.close();
        QScriptValue evVal = engine.evaluate(content, fname);
        if (evVal.isError()) {
            exit(-1);
        }
    }
....
}

So what am I doing wrong?

[mrbitmap]

I've solved the problem: I've placed Q_INIT_RESOURCE in main and it compiled successfully.