CMake failed to load QWebWidgets module

KaiKai

The code about this module in CMakeList.txt:

# project: dev-mini
# Qt: 6.2.4
# CMake: 3.21.0-rc1
find_package(QT NAMES Qt6 REQUIRED COMPONENTS WebEngineWidgets)
target_link_libraries(dev-mini PRIVATE Qt6::WebEngineWidgets) # line 24

But somethings are wrong...

D:\Code\C++\project\dev-mini\dev-mini\CMakeLists.txt:24: error: Cannot specify link libraries for target "dev-mini" which is not built by this project.
:-1: error: CMake process exited with exit code 1.
:-1: error: CMake returned error code: 1

I confirm that Qt WebEngine 6.2.4 has been installed.

jsulm

@KaiKai Has nothing to do with QWebEngine.
You did not define build target "dev-mini" in your CMake file. You need to do so first.
Like (if you want to build an executable):

add_executable(dev-mini)

SGaist

Hi,

In addition to what @jsulm wrote, you also have to use the Microsoft Visual studio compiler.

KaiKai

@jsulm
Would you mind to teach me where to put it?

cmake_minimum_required(VERSION 3.5)
project(dev-mini
    VERSION 0.1.0
    LANGUAGES CXX
)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 REQUIRED COMPONENTS Core)
find_package(QT NAMES Qt6 REQUIRED COMPONENTS Gui)
find_package(QT NAMES Qt6 REQUIRED COMPONENTS Widgets)
find_package(Qt6 REQUIRED COMPONENTS Widgets)
find_package(QT NAMES Qt6 REQUIRED COMPONENTS WebEngineWidgets)

set(PROJECT_SOURCES
    global/error.hpp
    global/error.cpp
    ui/object.hpp
    ui/object.cpp
    ui/mainwindow.hpp
    ui/mainwindow.cpp
    ui/translator.hpp
    ui/translator.cpp
    ui/workspace.hpp
    ui/workspace.cpp
    ui/icon.hpp
    ui/icon.cpp
    main.cpp
)
set(PROJECT_RESOURCES
    resource/icon.qrc
)

qt_add_executable(dev-mini
    MANUAL_FINALIZATION
    ${PROJECT_SOURCES}
    ${PROJECT_RESOURCES}
)

target_link_libraries(dev-mini PRIVATE Qt6::Widgets)
target_link_libraries(dev-mini PRIVATE Qt6::WebEngineWidgets)

set_target_properties(dev-mini PROPERTIES
    MACOSX_BUNDLE_GUI_IDENTIFIER dev.starlight.work/product/dev-mini
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

install(TARGETS dev-mini
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
)

qt_finalize_executable(dev-mini)

jsulm

@KaiKai said in CMake failed to load QWebWidgets module:

qt_add_executable(dev-mini

You already have it. Did you add it after my suggestion or was it already there but you get that CMake error?

KaiKai

@jsulm said in CMake failed to load QWebWidgets module:

You already have it. Did you add it after my suggestion or was it already there but you get that CMake error?

It was already there but I get that CMake error.

SGaist

Excuse me to insist but: which compiler are you using ?

KaiKai

@SGaist said in CMake failed to load QWebWidgets module:

Excuse me to insist but: which compiler are you using ?

This?
alt text

jsulm

@KaiKai This is CMake, not compiler. Please show what compiler you're using.

KaiKai

@jsulm Or this? (I'm sorry, I'm only a newbie)

jsulm

@KaiKai Ell, you could also simply show what compiler is set in the Kit, but from the last screen-shot it is at least visible that you're using MinGW. To use WebEngine you have to use Microsoft compiler (because the used Google Chromium engine only supports Microsoft compiler). So, you have to install Microsoft Visual Studio (or build tools) and Qt for Microsoft compiler.

KaiKai

@jsulm I have changed the compiler to MSVC. Everything else has been successful, but CMake has not found this module so far.

find_package(Qt6 REQUIRED COMPONENTS WebEngineWidgets)

D:\Code\C++\project\dev-mini\dev-mini\ui\workspace.hpp:9: error: C1083: 无法打开包括文件: “QtWebView/QWebEngineView”: No such file or directory

D:\Qt\Tools\CMake_64\share\cmake-3.23\Modules\CMakeFindDependencyMacro.cmake:47: warning: Found package configuration file: D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreConfig.cmake but it set Qt6WebEngineCore_FOUND to FALSE so package "Qt6WebEngineCore" is considered to be NOT FOUND.  Reason given by package: Qt6WebEngineCore could not be found because dependency Qt6WebChannel could not be found. D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:14 (find_dependency) D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6WebEngineWidgets/Qt6WebEngineWidgetsDependencies.cmake:96 (_qt_internal_find_dependencies) D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6WebEngineWidgets/Qt6WebEngineWidgetsConfig.cmake:40 (include) D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake:209 (find_package) CMakeLists.txt:22 (find_package)

jsulm

@KaiKai Did you install QtWebView module for Qt/MSVC?

KaiKai

@jsulm I've installed WebEngine and WebView module in Qt Maintenance Tool.

KaiKai

D:\Qt\6.2.4\msvc2019_64\lib\cmake\Qt6\Qt6Config.cmake:209: warning: Found package configuration file: D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreConfig.cmake but it set Qt6WebEngineCore_FOUND to FALSE so package "Qt6WebEngineCore" is considered to be NOT FOUND.  Reason given by package: Qt6WebEngineCore could not be found because dependency Qt6Positioning could not be found. CMakeLists.txt:22 (find_package)
D:\Code\C++\project\dev-mini\dev-mini\CMakeLists.txt:22: error: Found package configuration file: D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT FOUND.  Reason given by package: Failed to find Qt component "WebEngineCore". Expected Config file at "D:/Qt/6.2.4/msvc2019_64/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreConfig.cmake" exists
:-1: error: CMake process exited with exit code 1.
:-1: error: CMake returned error code: 1

Haowei Hsu

I met the same error as you did. And it seems that the reason of my situation is because:

WebEngineWidgets has a WebEngineCore dependency
but WebEngineCore cannot find its Positioning dependency.

Therefore, after I install "Qt Positioning" module in Qt Maintainance Tools, the error disappeared.

Khang.DT

@Haowei-Hsu you saved my day ^^. Thank you. Qt Positioning really fix this issue on my Qt 6.8