Qt6.4.2下CMake创建的QML项目无法编译求助

问题背景 #

环境：Qt Creator 10.0.0，基于Qt 6.4.2（MSVC 2019，x86_64）
更新至Qt6.4.2后，使用CMake创建的新QML项目无法编译，但通过.pro文件创建的Widget项目可正常编译。

项目CMakeLists.txt代码 #

cmake_minimum_required(VERSION 3.16)

project(untitled7 VERSION 0.1 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(Qt6 6.4 REQUIRED COMPONENTS Quick)

qt_standard_project_setup()

qt_add_executable(appuntitled7
    main.cpp
)

qt_add_qml_module(appuntitled7
    URI untitled7
    VERSION 1.0
    QML_FILES Main.qml
)

set_target_properties(appuntitled7 PROPERTIES
    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

target_link_libraries(appuntitled7
    PRIVATE Qt6::Quick
)

install(TARGETS appuntitled7
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})

编译错误信息 #

Running E:\Qt\Tools\CMake_64\bin\cmake.exe -S C:/Users/xxx/Documents/untitled7 -B C:/Users/xxx/Documents/build-untitled7-Desktop_Qt_6_4_3_MSVC2019_64bit-Debug in C:\Users\xxx\Documents\build-untitled7-Desktop_Qt_6_4_3_MSVC2019_64bit-Debug.
CMake Error at CMakeLists.txt:3 (project):
  project could not find requested file:

    C:/Users/xxx/Documents/build-untitled7-Desktop_Qt_6_4_3_MSVC2019_64bit-Debug/.qtc/package-manager/auto-setup.cmake


CMake Error at E:/Qt/Tools/CMake_64/share/cmake-3.24/Modules/FindThreads.cmake:66 (message):
  FindThreads only works if either C or CXX language is enabled
Call Stack (most recent call first):
  E:/Qt/Tools/CMake_64/share/cmake-3.24/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
  E:/Qt/6.4.3/msvc2019_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:33 (find_dependency)
  E:/Qt/6.4.3/msvc2019_64/lib/cmake/Qt6/Qt6Dependencies.cmake:24 (_qt_internal_find_third_party_dependencies)
  E:/Qt/6.4.3/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake:112 (include)
  CMakeLists.txt:7 (find_package)


CMake Error at CMakeLists.txt:7 (find_package):
  Found package configuration file:

    E:/Qt/6.4.3/msvc2019_64/lib/cmake/Qt6/Qt6Config.cmake

  but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
  FOUND.


-- Configuring incomplete, errors occurred!
CMake process exited with exit code 1.

Elapsed time: 00:00.

解决方案 #

• 修正Qt Kit版本配置
  错误日志显示CMake调用的是Qt6.4.3的库文件，但你实际安装的是6.4.2。打开Qt Creator的工具 > 选项 > Kits，检查当前项目使用的Kit，确保其关联的Qt版本为6.4.2，同时验证MSVC 2019编译器路径配置正确。

• 清理构建目录重新配置
  删除当前构建目录C:/Users/xxx/Documents/build-untitled7-Desktop_Qt_6_4_3_MSVC2019_64bit-Debug，在Qt Creator中点击项目 > 构建 > 清理项目，之后重新执行构建操作，让CMake重新生成正确的配置文件。

• 显式启用C++语言（可选）
  尽管project命令已指定LANGUAGES CXX，若问题仍存在，可在cmake_minimum_required之后、project之前添加以下代码，确保C++语言被正确启用：

  enable_language(CXX)
  

• 处理缺失的包管理器配置文件
  针对找不到.qtc/package-manager/auto-setup.cmake的错误，可手动在构建目录下创建.qtc/package-manager文件夹，或者在Qt Creator的工具 > 选项 > 项目 > CMake中禁用包管理器的自动配置选项。

内容的提问来源于stack exchange，提问作者MartinZ