Using QWebkit for windows with mingw

Thank You

What I use
Qt 5.12.8
mingw compilers both(64 and 34)
Windows 10 x64

I have tried the methods given in this link ( precompiled binaries method)
https://forum.qt.io/topic/119469/webkit-for-mingw-how-to-build

I tried all of the things with almost all of binaries.

Placing all files to QT directory
Building with both debug and release for both 32 and 64 bit.

They give me some errors with change in KIT

32 bit release

main.cpp:-1: error: undefined reference to `_imp___ZN8QWebViewC1EP7QWidget'
main.cpp:-1: error: undefined reference to `_imp___ZN8QWebView4loadERK4QUrl'
main.cpp:-1: error: undefined reference to `_imp___ZN8QWebViewD1Ev'
main.cpp:-1: error: undefined reference to `_imp___ZN8QWebViewD1Ev'
:-1: error: collect2.exe: error: ld returned 1 exit status
:-1: error: [Makefile.Release:69: release/web.exe] Error 1

32bit debug

:-1: error: No rule to make target 'C:/Qt/Qt5.12.8/5.12.8/mingw73_32/lib/libQt5WebKitWidgetsd.a', needed by 'debug/web.exe'.  Stop.

64bit release

Builds successfully but exits with this in Application output panel

The program has unexpectedly finished.
 The process was ended forcefully.

64bit debug

:-1: error: No rule to make target 'C:/Qt/Qt5.12.8/5.12.8/mingw73_64/lib/libQt5WebKitWidgetsd.a', needed by 'debug/web.exe'.  Stop.

It didn't work so :::::
I couldn't clone their repo to build it. It takes too long time and gets failed.

This isn't related with above question

JKSH

@Thank-You said in Using QWebkit for windows with mingw:

Qt5WebKitWidgets.dll is looking for QtPrivate::argToQString(QStringView), which is present in recent versions of Qt Core.

It sounds like the latest Qt WebKit binaries are built against Qt 5.14:

Can you update to Qt 5.14 or Qt 5.15?

JKSH

@Thank-You See if you can use one of the pre-built snapshots of the community version of Qt WebKit: https://download.qt.io/snapshots/ci/qtwebkit/5.212/latest/qtwebkit/

Thank You

@JKSH I used these precompiled libraries as said in mentioned links. (https://forum.qt.io/topic/119469/webkit-for-mingw-how-to-build)

I tried download it's repo but couldn't as it shows errors after some time of fetching

artwaw

@Thank-You when using precompiled ones you don't need to build them, right? That's the whole point. Just grab the binaries, include, go.

Thank You

@artwaw
Yes sir, I did that. Above mentioned errors are produced by using precompiled binaries

That method din't work so I was thinking of building but couldn't clone the repo.

Are there other options with QT with mingw and windows. I don't need any support for linux

artwaw

@Thank-You How did you install those precompiled binaries? Can you show your .pro file? It looks like those are not placed correctly, hence the fail.

Thank You

@artwaw

How did you install those precompiled binaries?

I just copied all files and moved to C:/Qt/Qt5.12.8/5.12.8/mingw73_32/ for 32 bit and on 64 bit C:/Qt/Qt5.12.8/5.12.8/mingw73_32/

web.pro

QT       += core gui webkitwidgets

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

FORMS += \
    mainwindow.ui

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include<QWebView>
#include<QtWebKit/QtWebKit>
#include<QtWebChannel/QWebChannel>
#include<QVBoxLayout>


QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
     QWebView *view ;
     QVBoxLayout *layout;
     QWidget *wid;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QHBoxLayout>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    wid = new QWidget();
    layout = new QVBoxLayout(wid);


    view = new QWebView(this);
    view->load(QUrl("https://google.com"));
    layout->addWidget(view);

    wid->setLayout(layout);
    setCentralWidget(wid);
}

MainWindow::~MainWindow()
{
    delete ui;
}

I hope it's correct 😂😂😂

artwaw

@Thank-You said in Using QWebkit for windows with mingw:

I just copied all files and moved to C:/Qt/Qt5.12.8/5.12.8/mingw73_32/ for 32 bit and on 64 bit C:/Qt/Qt5.12.8/5.12.8/mingw73_32/

what

artwaw

@Thank-You also if I am not mistaken you need not only webkitwidgets - I have a program that uses webkit as w page viewer, written some time ago, but its pro file had to have Qt += webkitwidgets webkit together to work properly. I am not certain if this might be the case but please try, as I said it was some time ago.

Thank You

@artwaw said in Using QWebkit for windows with mingw:

you need not only webkitwidgets

Sorry, I was trying to tweak things if it will work after you asked about .pro file. I had actually have both

what

What Should I do?
Isn't it correct.
https://forum.qt.io/topic/119469/webkit-for-mingw-how-to-build/18

artwaw

@Thank-You Just to make sure: you copied 32bit files to 32bit mingw at mingw73_32 (which makes sense) and then you copied 64bit files to 32bit mingw folder, possibly overwriting 32bit libraries copied previously?

Thank You

@artwaw
Single option is given:
qtwebkit-Windows-Windows_10-Mingw73-Windows-Windows_10-X86_64.7z

So I copied same things to both directories.

This is bin folder. It doesn't have any differences

and others are also same. Files aren't seperated

artwaw

@Thank-You said in Using QWebkit for windows with mingw:

X86_64.7z

Those are 64bit binaries. They will not work if you compile for 32bit target.

Thank You

@artwaw

Ok But compiling with 64 bit also gives error on both debug and release.(Mentioned at the main post)
What about it?
Where can I get 32bit binaries?

Christian Ehrlicher

@Thank-You said in Using QWebkit for windows with mingw:

Where can I get 32bit binaries?

On the same link from above I would guess.

artwaw

@Thank-You said in Using QWebkit for windows with mingw:

But compiling with 64 bit also gives error on both debug and release.(Mentioned at the main post)

Hardly a surprise if you did not copy the 64bit binaries to the 64bit part of Qt tree.

Thank You

@artwaw
I tried using windows 7 32bit binaries in 32 bit and it compiled but shows message

The program has unexpectedly finished.
 The process was ended forcefully.

I couldn't make it working

artwaw

@Thank-You You can try to use a Dependency Walker tool to identify what's missing.

Thank You

@artwaw
I used it. Found out libxml2-2.dll libxslt-1.dll were not present after running windeployqt. So I copied them to executable directory.
After that it shows this error.

JKSH

@Thank-You said in Using QWebkit for windows with mingw:

Qt5WebKitWidgets.dll is looking for QtPrivate::argToQString(QStringView), which is present in recent versions of Qt Core.

It sounds like the latest Qt WebKit binaries are built against Qt 5.14:

Can you update to Qt 5.14 or Qt 5.15?