CMake - 找不到“QT”提供的包配置文件

Question

我在使用 CMake 时遇到了一些问题。当我尝试为 Visual Studio 2019 配置构建时，它显示错误。当我检查 CMakeLists.txt 时，一切看起来都很好，但仍然有问题。该文件是由 Qt 自动创建的，我只是添加了一些东西来连接一些目录。我可以做什么来解决这个问题？

这是错误：

Selecting Windows SDK version 10.0.18362.0 to target Windows 10.0.19041.
The CXX compiler identification is MSVC 19.28.29334.0
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Check for working CXX compiler: D:/VS/VS-IDE/VC/Tools/MSVC/14.28.29333/bin/Hostx64/x64/cl.exe - skipped
Detecting CXX compile features
Detecting CXX compile features - done
CMake Error at CMakeLists.txt:27 (find_package):
  Could not find a package configuration file provided by "QT" with any of
  the following names:

    Qt6Config.cmake
    qt6-config.cmake
    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "QT" to CMAKE_PREFIX_PATH or set "QT_DIR" to
  a directory containing one of the above files.  If "QT" provides a separate
  development package or SDK, be sure it has been installed.


Configuring incomplete, errors occurred!

这是我的 CMakeList.txt：

cmake_minimum_required(VERSION 3.5)

project(bacteria LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

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

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# QtCreator supports the following variables for Android, which are identical to qmake Android variables.
# Check http://doc.qt.io/qt-5/deployment-android.html for more information.
# They need to be set before the find_package(Qt5 ...) call.

#if(ANDROID)
#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
#    if (ANDROID_ABI STREQUAL "armeabi-v7a")
#        set(ANDROID_EXTRA_LIBS
#            ${CMAKE_CURRENT_SOURCE_DIR}/path/to/libcrypto.so
#            ${CMAKE_CURRENT_SOURCE_DIR}/path/to/libssl.so)
#    endif()
#endif()

find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets LinguistTools REQUIRED)
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets LinguistTools REQUIRED)

#Mine add
find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)

set(TS_FILES bacteria_ru_RU.ts)

#Mine add
set(CMAKE_PREFIX_PATH "D:/Qt/5.15.2/mingw81_64")

if(ANDROID)
  add_library(bacteria SHARED
    main.cpp
    mainwindow.cpp
    mainwindow.h
    mainwindow.ui
    #My add
    mainmatrix.cpp
    mainmatrix.h
    microbe.cpp
    microbe.h
    microbecontainer.cpp
    microbecontainer.h
    food.cpp
    food.h
    ${TS_FILES}
  )
else()
  add_executable(bacteria
    main.cpp
    mainwindow.cpp
    mainwindow.h
    mainwindow.ui
    #My add
    mainmatrix.cpp
    mainmatrix.h
    microbe.cpp
    microbe.h
    microbecontainer.cpp
    microbecontainer.h
    food.cpp
    food.h
    ${TS_FILES}
  )
endif()

target_link_libraries(bacteria PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

qt5_create_translation(QM_FILES ${CMAKE_SOURCE_DIR} ${TS_FILES})

Answer 1

在find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)之前添加set(CMAKE_PREFIX_PATH "/Users/YOURPATH/Qt/6.1.0/clang_64") 这行代码为我解决了问题（macOS）。找到 QT 目录并复制/clang_64 文件的路径。如果您遇到 QT 问题，请尝试重新安装https://www.qt.io/download-open-source?hsCtaTracking=9f6a2170-a938-42df-a8e2-a9f0b1d6cdce%7C6cb0de4f-9bb5-4778-ab02-bfb62735f3e5

Answer 2

如果您在 Mac 上遇到同样的问题，以下是我之前添加的内容 find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)：

set(CMAKE_PREFIX_PATH "/Users/MY_USER_NAME/Qt/6.1.2/macos/lib/cmake")

就我而言，cmake 包含很多文件夹，其中许多都有.cmake文件。显然 CMake 在那里找到了所需的包。