CMakeLists.txt 文件

# CMakeLists.txt
cmake_minimum_required(VERSION 3.5...3.16)

project(myApp VERSION 1.0 LANGUAGES CXX)


set(CMAKE_CXX_STANDARD 11)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOMOC  ON)
set(CMAKE_INCLUDE_CURRENT_DIR ON)  # 自动包含当前目录



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

# 源文件
set(SOURCES
        main.cpp
        mainwindow.cpp
)

set(HEADERS
    mainwindow.h
)

set(FORMS
    mainwindow.ui
)

set(RESOURCES
    resources.qrc
    # 其他资源文件
)

##全局 添加 include 路径
# include_directories(
#     "path/to/include"
#     "another/path/to/include"
# )
## 设置变量（可选）
#set(OPENCV_INCLUDE_DIR "D:/opencv/build/include")
## 为特定目标添加包含路径
#target_include_directories(${PROJECT_NAME} PRIVATE ${OPENCV_INCLUDE_DIR})

##全局添加 lib 路径
#link_directories("path/to/lib")
## 设置变量（可选）
#set(OPENCV_LIB_DIR "D:/opencv/build/x64/vc14/lib")
## 为特定目标添加链接路径
#target_link_directories(${PROJECT_NAME} PRIVATE ${OPENCV_LIB_DIR})

# 生成可执行文件
add_executable(${PROJECT_NAME} ${SOURCES} ${HEADERS} ${FORMS} ${RESOURCES})

# 链接 Qt 库
target_link_libraries(${PROJECT_NAME} PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)


#cmake -DCMAKE_C_FLAGS="-I/D:/opencv/build/include" -DCMAKE_CXX_FLAGS="-I/D:/opencv/build/include -L/D:/opencv/build/x64/vc14/lib" ..

源文件 main.cpp

#include <QApplication>
#include <QWidget>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // Create a new instance of the main window
    QWidget w;

    // Show the main window
    w.show();

    // Run the application's event loop
    return a.exec();
}

CMake 编译

这里是重点,要使用 Qt 的qtenv2.bat设置环境变量, 不然就要弄一堆 -DQt5_DIR=xxx -DQt6_DIR=xxx 之类的参数,很麻烦.

cmake -S . -B build -G "MinGW Makefiles" -DCMAKE_PREFIX_PATH="E:/programes/Qt/QtLegacy/5.7/mingw53_32" -DCMAKE_C_COMPILER="E:/programes/Qt/QtLegacy/Tools/mingw530_32/bin/gcc.exe" -DCMAKE_CXX_COMPILER="E:/programes/Qt/QtLegacy/Tools/mingw530_32/bin/g++.exe"

cmake -S . -B build  -A win32 -DCMAKE_PREFIX_PATH="E:/programes/Qt/Qt/5.15.2/msvc2019"

C:\Windows\System32\cmd.exe /A /Q /K E:\programes\Qt\Qt\6.10.1\mingw_64\bin\qtenv2.bat
cmake -S . -B build/release -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release
cmake --build build/release