Can't set up CMake. Getting errors.

[SGaist]

Hi and welcome to devnet,

AFAIK, you should install a full version of Qt in order to build your application.

Just in case, the online installer also provides tools like cmake and Ninja to ensure that you have versions that have been tested and validated to work with Qt.

[jLyurii]

@SGaist Yeah, I have already installed it, but it doesn't help. This screenshot is from the MaintenanceTool

[SGaist]

Did you open your project in Qt Creator using the Kit from the 6.5.2 variant you choose ?

[jLyurii]

@SGaist I only used Qt Design Studio. I wanted to create the GUI there and then edit its functionality in VSCode.
upd: But there is an option in Qt Design Studio to choose a kit down below. I didn't change it after I launched the studio.

[cristian-adam]

"CMAKE_PREFIX_PATH": "D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake"

is wrong. You only need:

"CMAKE_PREFIX_PATH": "D:/Programming/Qt_Designer/6.5.2/msvc2019_64"

Being a prefix CMake will automatically try out appending the suffix lib/cmake by itself ...

It's a classic error with no easy fix, but teaching people what not to do ...

[jLyurii]

@cristian-adam I just tried it, but I encountered the same issue.

[main] Configuring project: japanese_app_v2 
[proc] Executing command: D:\Programming\CMake\bin\cmake.EXE --no-warn-unused-cli -DCMAKE_BUILD_TYPE:STRING=Debug -DCMAKE_PREFIX_PATH:STRING=D:/Programming/Qt_Designer/6.5.2/msvc2019_64 -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_C_COMPILER:FILEPATH=C:\msys64\mingw64\bin\gcc.exe -DCMAKE_CXX_COMPILER:FILEPATH=C:\msys64\mingw64\bin\g++.exe -SC:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/qt_gui/Japanese_app_v20_gui -Bc:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/build -G "MinGW Makefiles"
[cmake] Not searching for unused variables given on the command line.
[cmake] -- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
[cmake] CMake Error at D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6EntryPointPrivate/Qt6EntryPointPrivateTargets.cmake:99 (message):
[cmake]   The imported target "Qt6::EntryPointImplementation" references the file
[cmake] 
[cmake]      "D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/Qt6EntryPointd.lib"
[cmake] 
[cmake]   but this file does not exist.  Possible reasons include:
[cmake] 
[cmake]   * The file was deleted, renamed, or moved to another location.
[cmake] 
[cmake]   * An install or uninstall procedure did not complete successfully.
[cmake] 
[cmake]   * The installation package was faulty and contained
[cmake] 
[cmake]      "D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6EntryPointPrivate/Qt6EntryPointPrivateTargets.cmake"
[cmake] 
[cmake]   but not all the files it references.
[cmake] 
[cmake] Call Stack (most recent call first):
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6EntryPointPrivate/Qt6EntryPointPrivateConfig.cmake:52 (include)
[cmake]   D:/Programming/CMake/share/cmake-3.27/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
[cmake]   D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:111 (find_dependency)
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Core/Qt6CoreDependencies.cmake:39 (_qt_internal_find_qt_dependencies)
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Core/Qt6CoreConfig.cmake:40 (include)
[cmake]   D:/Programming/CMake/share/cmake-3.27/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
[cmake]   D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:111 (find_dependency)
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Gui/Qt6GuiDependencies.cmake:39 (_qt_internal_find_qt_dependencies)
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake:40 (include)
[cmake]   D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake:157 (find_package)
[cmake]   CMakeLists.txt:8 (find_package)
[cmake] -- Configuring incomplete, errors occurred!
[cmake] 
[cmake] 
[cmake] CMake Warning at D:/Programming/CMake/share/cmake-3.27/Modules/CMakeFindDependencyMacro.cmake:76 (find_package):
[cmake]   Found package configuration file:
[cmake] 
[cmake]     D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Core/Qt6CoreConfig.cmake
[cmake] 
[cmake]   but it set Qt6Core_FOUND to FALSE so package "Qt6Core" is considered to be
[cmake]   NOT FOUND.
[cmake] Call Stack (most recent call first):
[cmake]   D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:111 (find_dependency)
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Gui/Qt6GuiDependencies.cmake:39 (_qt_internal_find_qt_dependencies)
[cmake]   D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake:40 (include)
[cmake]   D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake:157 (find_package)
[cmake]   CMakeLists.txt:8 (find_package)
[cmake] 
[cmake] 
[cmake] CMake Warning at D:/Programming/Qt_Designer/6.5.2/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake:157 (find_package):
[cmake]   Found package configuration file:
[cmake] 
[cmake]     D:/Programming/Qt_Designer/Tools/QtDesignStudio/qt6_design_studio_reduced_version/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake
[cmake] 
[cmake]   but it set Qt6Gui_FOUND to FALSE so package "Qt6Gui" is considered to be
[cmake]   NOT FOUND.
[cmake] Call Stack (most recent call first):
[cmake]   CMakeLists.txt:8 (find_package)
[cmake] 
[cmake] 
[proc] The command: D:\Programming\CMake\bin\cmake.EXE --no-warn-unused-cli -DCMAKE_BUILD_TYPE:STRING=Debug -DCMAKE_PREFIX_PATH:STRING=D:/Programming/Qt_Designer/6.5.2/msvc2019_64 -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_C_COMPILER:FILEPATH=C:\msys64\mingw64\bin\gcc.exe -DCMAKE_CXX_COMPILER:FILEPATH=C:\msys64\mingw64\bin\g++.exe -SC:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/qt_gui/Japanese_app_v20_gui -Bc:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/build -G "MinGW Makefiles" exited with code: 1

[jLyurii]

After I reinstalled Qt in a different directory and added set(CMAKE_PREFIX_PATH "D:/Qt/6.5.1/msvc2019_64") to the CMakeLists.txt file, it started compiling. Output:

[main] Configuring project: japanese_app_v2 
[proc] Executing command: D:\Programming\CMake\bin\cmake.EXE --no-warn-unused-cli -DCMAKE_BUILD_TYPE:STRING=Debug -DCMAKE_PREFIX_PATH:STRING=D:/Programming/Qt_Designer/6.5.1/msvc2019_64 -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_C_COMPILER:FILEPATH=C:\msys64\mingw64\bin\gcc.exe -DCMAKE_CXX_COMPILER:FILEPATH=C:\msys64\mingw64\bin\g++.exe -SC:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/qt_gui/Japanese_app_v20_gui -Bc:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/build -G "MinGW Makefiles"
[cmake] Not searching for unused variables given on the command line.
[cmake] -- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
[cmake] -- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
[cmake] CMake Warning (dev) at D:/Qt/6.5.1/msvc2019_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:2690 (message):
[cmake]   Qt policy QTP0001 is not set: ':/qt/qml/' is the default resource prefix
[cmake]   for QML modules.  Check https://doc.qt.io/qt-6/qt-cmake-policy-qtp0001.html
[cmake]   for policy details.  Use the qt_policy command to set the policy and
[cmake]   suppress this warning.
[cmake] 
[cmake] Call Stack (most recent call first):
[cmake]   D:/Qt/6.5.1/msvc2019_64/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:445 (__qt_internal_setup_policy)
[cmake]   qmlmodules:4 (qt6_add_qml_module)
[cmake]   CMakeLists.txt:26 (include)
[cmake] This warning is for project developers.  Use -Wno-dev to suppress it.
[cmake] 
[cmake] CMake Warning (dev) at D:/Qt/6.5.1/msvc2019_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:2690 (message):
[cmake]   Qt policy QTP0001 is not set: ':/qt/qml/' is the default resource prefix
[cmake]   for QML modules.  Check https://doc.qt.io/qt-6/qt-cmake-policy-qtp0001.html
[cmake]   for policy details.  Use the qt_policy command to set the policy and
[cmake]   suppress this warning.
[cmake] 
[cmake] Call Stack (most recent call first):
[cmake]   D:/Qt/6.5.1/msvc2019_64/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:445 (__qt_internal_setup_policy)
[cmake]   content/CMakeLists.txt:7 (qt6_add_qml_module)
[cmake] This warning is for project developers.  Use -Wno-dev to suppress it.
[cmake] 
[cmake] CMake Warning (dev) at D:/Qt/6.5.1/msvc2019_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:2690 (message):
[cmake]   Qt policy QTP0001 is not set: ':/qt/qml/' is the default resource prefix
[cmake]   for QML modules.  Check https://doc.qt.io/qt-6/qt-cmake-policy-qtp0001.html
[cmake]   for policy details.  Use the qt_policy command to set the policy and
[cmake]   suppress this warning.
[cmake] 
[cmake] Call Stack (most recent call first):
[cmake]   D:/Qt/6.5.1/msvc2019_64/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:445 (__qt_internal_setup_policy)
[cmake]   imports/Japanese_app_v20_gui/CMakeLists.txt:12 (qt6_add_qml_module)
[cmake] This warning is for project developers.  Use -Wno-dev to suppress it.
[cmake] 
[cmake] -- Configuring done (0.7s)
[cmake] -- Generating done (0.5s)
[cmake] -- Build files have been written to: C:/Users/YuriiButNotYuri/Desktop/japanese_app_v2/build

However, I encountered another issue when trying to compile main.cpp

[jsulm]

@jLyurii Is it really a compiler error or just what the editor is showing? Code model in QtCreator can show errors even if the application is building.

[jLyurii]

@jsulm this is what Qt Creator shows

07:59:42: Starting C:\Users\YuriiButNotYuri\Desktop\japanese_app_v2\qt_gui\build-Japanese_app_v20_gui-Desktop_Qt_6_5_1_MSVC2019_64bit-Debug\Japanese_app_v20_guiApp.exe...
QML debugging is enabled. Only use this in a safe environment.
QQmlApplicationEngine failed to load component
qrc:Main/main.qml:4:1: Type App unavailable
qrc:/content/App.qml:14:5: Type Screen01 unavailable
qrc:/content/Screen01.ui.qml: Type Constants unavailable
qrc:/Japanese_app_v20_gui/Constants.qml:3:1: module "QtQuick.Studio.Application" is not installed
07:59:43: C:\Users\YuriiButNotYuri\Desktop\japanese_app_v2\qt_gui\build-Japanese_app_v20_gui-Desktop_Qt_6_5_1_MSVC2019_64bit-Debug\Japanese_app_v20_guiApp.exe exited with code -1

[jsulm]

@jLyurii So, the application was built but it fails because some Qml types are not available. But I'm not a Qml expert.

[jLyurii]

@jsulm I used to believe that the only way to create a C++ GUI was through Qt Design Studio, as I had never created anything in C++ other than console programs. I've created a GUI in Python in the past with it. However, I stumbled upon examples in Qt Creator that use .ui files. I'm familiar with this approach, having worked with UI and widgets before. I believe I'll continue using widgets since they don't show any errors when the program is executed.
I will close this conversation as I no longer require assistance with qml. If I encounter any further issues, I'll post on a forum if I'm unable to resolve them myself. Thank you to everyone who tried to help me.