Qt 5.15.2 MinGW 32-bit throwing errors but 64-bit version working fine.

hbatalha

I am trying to build 32-bit application after successfully building the 64-bit.

However, after setting up my kit and trying to run the application it produces a lot of errors while building for 64-bit works fine.

the first error is this one:

\ui_mainwindow.h:13: error: QtGui/QAction: No such file or directory
In file included from mainwindow.cpp:2:
ui_mainwindow.h:13:10: fatal error: QtGui/QAction: No such file or directory
 #include <QtGui/QAction>
          ^~~~~~~~~~~~~~~

Then some errors with connect, like this one:

connect(ui->to, &QSpinBox::valueChanged, [this]()
    {
        ui->from->setMaximum(ui->to->value());
    });

The code above throws the following error:

playlistdialog.cpp:39: error: no matching function for call to 'PlaylistDialog::connect(QSpinBox*&, <unresolved overloaded function type>, PlaylistDialog::PlaylistDialog(QString, QString, int, int, int, QWidget*)::<lambda()>)'
playlistdialog.cpp:39:6: error: no matching function for call to 'PlaylistDialog::connect(QSpinBox*&, <unresolved overloaded function type>, PlaylistDialog::PlaylistDialog(QString, QString, int, int, int, QWidget*)::<lambda()>)'
     });
      ^

There are a couple more errors similar to the one above.

And then some more similar errors:

videoFormats = {"mp4"/*, "webm", "flv", "3gp", "avi"*/};

Throws this error:

\playlistdialog.cpp:65: error: ambiguous overload for 'operator=' (operand types are 'QStringList' and '<brace-enclosed initializer list>')
playlistdialog.cpp:65:59: error: ambiguous overload for 'operator=' (operand types are 'QStringList' and '<brace-enclosed initializer list>')
     videoFormats = {"mp4"/*, "webm", "flv", "3gp", "avi"*/};
                                                           ^

I can't see the reason for these 3 type of errors since they are working fine in Qt 5.15.2 MinGW 64-bit.

Any idea?? Thanks!!

SGaist

Hi,

Are you using a 32bit build of Qt ?

Christian Ehrlicher

@hbatalha said in Qt 5.15.2 MinGW 32-bit throwing errors but 64-bit version working fine.:

#include <QtGui/QAction>

This is Qt4. Are you sure you installed Qt4/32bit correctly? I would guess no.
Make sure the correct uic compiler is picked up (the Qt5 one) if you have installed and want to use Qt5

hbatalha

@SGaist

Christian Ehrlicher

@hbatalha And what do you want to tell with us? It's completely irrelevant what Qt version or what else your IDE is using...

hbatalha

@Christian-Ehrlicher Sorry, where can I find the info you requested me?

SGaist

In the Kit settings

hbatalha

@SGaist this one?

nagesh

@hbatalha said in Qt 5.15.2 MinGW 32-bit throwing errors but 64-bit version working fine.:

I am trying to build 32-bit application after successfully building the 64-bit.

Did the same project successfully built in 64-bit?

looks like uic compiler of Qt4 version is linked, clean and rebuild the project.

check whether generated "ui_mainwindow.h" file having current timestamp.

have a look into makefile and check whether it's reflecting the valid settings.
(QMAKE/CXXFLAGS)

hbatalha

@nagesh said in Qt 5.15.2 MinGW 32-bit throwing errors but 64-bit version working fine.:

Did the same project successfully built in 64-bit?

I came to realize that the 64-bit that built successfully is the Qt 6.0.0 mingw 64 bit and Qt 6.0.1 mingw 64 bit not Qt 5.15.2 mingw 64 bit as I don't have it installed.

clean and rebuild the project.

Did that multiple times, same result

check whether generated "ui_mainwindow.h" file having current timestamp.

Didn't understand, how do I do that?

have a look into makefile and check whether it's reflecting the valid settings.

How will I know if it not reflecting valid settings

hbatalha

@Christian-Ehrlicher said in Qt 5.15.2 MinGW 32-bit throwing errors but 64-bit version working fine.:

Make sure the correct uic compiler is picked up (the Qt5 one) if you have installed and want to use Qt5

How will I check that?

nagesh

@hbatalha in the build directory check for Makefile. Debug/Release based on your build
and search for bin/uic and confirm it's from the currect version..

hbatalha

@nagesh So I uinstalled Qt 5.15.2 MinGW 32-bit and installed Qt 5.15.1 MinGW 32-bit(just for the sake of trying), same results

search for bin/uic and confirm it's from the currect version..

C:/Qt/5.15.1/mingw81_32/bin/uic.exe

That is what I found, I guessing it is right version

Christian Ehrlicher

As I already said - either there is a uic.exe from Qt4 around or you checked in the generated ui_mainwindow.h (which also then was created with a Qt4 uic) - remove both.

hbatalha

@Christian-Ehrlicher

remove both.

To remove uic.exe and the generated ui_mainwindow.h???
Sorry I don't understand what exactly you are telling me to do.

either there is a uic.exe from Qt4 around

I would guess no. Is there any possible scenario where you would download compilers only from qt5 and end up with some files from qt4 in them?

Christian Ehrlicher

Remove the ui_mainwindow.h - it was created with an uic.exe from Qt4.

hbatalha

@Christian-Ehrlicher I did that and it solved the first error. But I am still left with the other 2 types of compiling error mentioned in the OP.

Christian Ehrlicher

The documentation to QSpinBox::valueChanged() exectly desribes your problem. Reading docs is sometimes useful...

hbatalha

@Christian-Ehrlicher yeah it works, but still... when I compile using Qt 6.0.1 64-bit it works fine, it should work.

The problem is not really the compile errors, it is why my code works fine using Qt 6.0.1 64-bit and fails when using Qt 5.15.1/2 32-bit.

In the OP I posted 3 errors but it is really 3 type of errors, there are a lot more than just 3 errors all over my project and also there are other type of errors.

I tried commenting the lines that threw the errors and it compiled successfully and thus a question arose: will I have to rewrite everything so it can compile in 32-bit?? That doesn't seem right to me, I don't think it is supposed to be this way.

SGaist

Because the overloads triggering the compilation error have been either renamed or removed in Qt 6.