Qt and Web Assembly - Installation, running examples and openCV

[Stophe]

Hi,
I've searched in the documentation and a few pages here how to solve my issues, without luck.

First, I have an issue when running any example, it compiles, open a browers and says :

- Qt for WebAssembly: [project]
Application exit (RuntimeError: Aborted('specialHTMLTargets' was not exported. add it to EXPORTED_RUNTIME_METHODS (see the FAQ)))

Did not find what causes this in the FAQ, and even ChatGPT lied to me.

Example, a very simple hello world program :

#include <QApplication>
#include <QPushButton>
#include <QTranslator>
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTranslator translator;
    if (!translator.load("hellotr_la"))
        return 1;
 
    app.installTranslator(&translator);
 
    QPushButton hello(QPushButton::tr("Hello world!"));
    hello.resize(100, 30);
    hello.show();
    return app.exec();
}

#include <QApplication>
#include <QPushButton>
#include <QTranslator>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTranslator translator;
    if (!translator.load("hellotr_la"))
        return 1;

    app.installTranslator(&translator);

    QPushButton hello(QPushButton::tr("Hello world!"));
    hello.resize(100, 30);
    hello.show();
    return app.exec();
}

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Second issue is linking libraries such as opencv, it says the .dll built with mingw are "unknown file type"

wasm-ld: error: unknown file type: C:/Dev/opencv/mingw-build/bin/libopencv_calib3d460.dll

Thanks for any help !