WebKit for minGW - how To build?

TomNow99

Hi,

My Qt version: 5.12.8
Os: Windows 10 Pro 64bits
cmake version 3.18.0

I would like to build WebKit for MinGW, so I go to page:

https://github.com/qtwebkit/qtwebkit/releases/tag/qtwebkit-5.212.0-alpha2

download "qtwebkit-5.212.0-alpha2.tar.xz", unzip it and move to folder "webkitFiles" and create in this folder other folder "build", so in folder "webkitFiles" I have:

folder "build"
folder "qtwebkit-5.212.0-alpha2"

Next I run cmake ( cmake-gui ) and select path to folders:

where is the source code: C:/Users/tom/Desktop/webkitFiles/qtwebkit-5.212.0-alpha2/Source
where to build the binaries: C:/Users/tom/Desktop/webkitFiles/build

Next I clicked "configure" and in popup I select:

Specify the generator for this project: MinGW MakeFiles
Specyfy native compilers
( clicked next)

Compilers:
C C:/Qt/Qt5.12.8/Tools/mingw730_64/bin/gcc.exe
C++ C:/Qt/Qt5.12.8/Tools/mingw730_64/bin/g++.exe
Fortran ( don't set )
(clicked finish )

And here I get errors:

CMake Warning (dev) in CMakeLists.txt:
  No project() command is present.  The top-level CMakeLists.txt file must
  contain a literal, direct call to the project() command.  Add a line of
  code such as

    project(ProjectName)

  near the top of the file, but after cmake_minimum_required().

  CMake is pretending there is a "project(Project)" command on the first
  line.
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Warning (dev) in CMakeLists.txt:
  No cmake_minimum_required command is present.  A line of code such as

    cmake_minimum_required(VERSION 3.18)

  should be added at the top of the file.  The version specified may be lower
  if you wish to support older CMake versions for this project.  For more
  information run "cmake --help-policy CMP0000".
This warning is for project developers.  Use -Wno-dev to suppress it.

Configuring incomplete, errors occurred!

I don't changed any file, which I download, so that files are broken?

artwaw

Hi,
Please read this page https://github.com/qtwebkit/qtwebkit/wiki/Building-QtWebKit-on-Windows
I managed to compile QtWebkit on windows 10, macOS and Debian.

On Windows, in particular, please pay attention to the prerequisites, i.e. Python 3 and Conan.

Conan script makes sure all dependencies are met and does the job brilliantly.

Also please make sure you checkout a proper repository before compiling, should be qtwebkit-5.212 - it is not the default one.

EDIT:
you might also want to skip the build process and get yourself precompiled binaries from this branch: http://download.qt.io/snapshots/ci/qtwebkit/5.212/1600126303/qtwebkit/

TomNow99

@artwaw Arturze! Thank you very much. This way with precompiled binaries seems very nice, but... I never do this before.

Websites, which can help me:

https://github.com/qtwebkit/qtwebkit/wiki/Using-QtWebKit-in-your-project

"First of all you need to build QtWebKit (according to instructions for you OS), and install it (ninja install if you build with Ninja). " <- I have build, but I don't know, how can I install it.

https://doc.qt.io/qt-5.12/windows-building.html

"For MinGW, type: mingw32-make". But I don't see any makefiles in this folder with precompiled binaries. How can I install it?

jsulm

@TomNow99

mingw32-make install

is usually the step to install after building.

"But I don't see any makefiles in this folder with precompiled binaries" - of course not, these are binaries. Just copy the binaries over your Qt installation.

TomNow99

@jsulm I know that is noob question, but could you tell me what I have to do?

On the left is folder: C:\Qt\Qt5.14.0\5.14.0\mingw73_64
On the right is folder with binaries: C:\Users\tom\Desktop\webkitFiles

( the qt version is other because of I do that on other pc )

So I have to open all of that 5 folders ( right ) and move all files on it to folders ( left ) with the same names?

jsulm

@TomNow99 As I wrote: copy it over (means: content of bin folder goes into the bin folder of your Qt installations and so on).

TomNow99

@jsulm Done. I try do "mingw32-make install" using cmd.exe in "C:\Qt\Qt5.14.0\5.14.0\mingw73_64\bin", but I get error:
No rule to make target "install". Stop.

jsulm

@TomNow99 Come on: you installed BINARIES, there is no need to call make install (it is only needed when building sources).

TomNow99

@jsulm Ok, I understand. Now I add in .pro
QT += webkit webkitwidgets

and I have to do something with the path. Could you tell me, where and what? I think I have to add path in qtcreator in projects->system variables -> path -> append path

I know that my question is noob question, but I prefer to ask something stupid and have perfect schedule, what I have to do, when I need other libraries.

jsulm

@TomNow99 said in WebKit for minGW - how To build?:

and I have to do something with the path

What do you mean? What path? If you installed correct binaries it should just work.

TomNow99

@jsulm When I build my simple project ( I only add this line in .pro ) I get error
"Unknown module(s) in QT: webkit webkitwidgets" and in qtcreator files "mainwindow.h", "mainwindow.cpp", "main.cpp" are in dark gray color.

EDIT mainwindow.ui the same dark gray color

EDIT2:

jsulm

@TomNow99 Which exact archive did you download from http://download.qt.io/snapshots/ci/qtwebkit/5.212/1600126303/qtwebkit/ ? You have to use the one matching your Qt (MinGW 64bit).

TomNow99

@jsulm I add edit2 in my last post.

I downloaded version to Win 10 mingw, so the first one - " qtwebkit-Windows-Windows_10-Mingw-Windows-Windows_10-X86_64.7z"

jsulm

@TomNow99 And you copied everything (not only bin)?

TomNow99

@jsulm I copied all files from "C:\Users\tom\Desktop\webkitFiles\bin"

so I copied:

I don't touch any other folder in "C:\Users\tom\Desktop\webkitFiles\bin" ( include, lib, mkspecs, qml ).

jsulm

@TomNow99 You have to copy over everything from the downloaded archive, not only bin...

TomNow99

@jsulm I think when you wrote "(means: content of bin folder goes into the bin folder of your Qt installations and so on)." you mean really only bin folder

jsulm

@TomNow99 "(means: content of bin folder goes into the bin folder of your Qt installations and so on)" - see "and so one", bin was just an example.

TomNow99

@jsulm Now it works.

Jsulm, you are a good man. Really. THANK YOU VERY MUCH!

artwaw

Hi,
sorry for late reply but I see @jsulm helped you sort things out.

While building stuff yourself is usually (frustrating) fun and I like to do it (one can take a user from Linux but never a Linux from the user) using precompiled binaries is more often better approach. Especially if you don't intend to expand those in any way, just use. Above all, saves time.

Just to recap on your last posts - docs for QtWebKit can be sometimes misleading for a newbie. Should you attempt in the future to compile it - don't bother with cmake. Use the conan script and conan script only, on Windows if you add --install switch it should install binaries in your Qt folder tree ready for use. Any other approach requires a bit more digging around (and can lead to errors).

Anyway, I am happy you managed to sort out your problem.