itechnology:cpp:cmake

Содержание

CMake для сборки проекта

CMake для сборки проекта

Сборка проекта

в каталоге исходных кодов:
```
mkdir build
cd build
cmake ..
```
Сборка проекта
```
make
```
или в общем случае
```
cmake --build  . --parallel
```

Hello, World

main.cpp

#include <iostream>
int main(int argc, char** argv)
{
    std::cout << "Hello, World!" << std::endl;
    return 0;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(hello)
add_executable(main main.cpp)

Разделение кода на .cpp и .h файлы

main.cpp

#include "foo.h"
int main(int argc, char** argv)
{
    hello_world();
    return 0;
}

foo.h
```
void hello_world();
```

foo.cpp

#include <iostream>
void hello_world()
{
    std::cout << "Hello, World!" << std::endl;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(hello_world)
set(SOURCE_EXE main.cpp)
set(SOURCE_LIB foo.cpp)
# STATIC/SHARED
add_library(src_lib STATIC ${SOURCE_LIB})
add_executable(main ${SOURCE_EXE})
target_link_libraries(main src_lib)

Подпроект

main.cpp

#include "foo.h"
int main(int argc, char** argv)
{
    hello_world();
    return 0;
}

подпроект «foo», каталог «./foo/»:

foo.h
```
void hello_world();
```

foo.cpp

#include <iostream>
void hello_world()
{
    std::cout << "Hello, World!" << std::endl;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(foo)
set(SOURCE_LIB foo.cpp)
# build "foo" library
add_library(foo STATIC ${SOURCE_LIB})

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(hello_world)
set(SOURCE_EXE main.cpp)
include_directories(foo)
add_executable(main ${SOURCE_EXE})
add_subdirectory(foo)
target_link_libraries(main foo)

Внешняя библиотека boost и .cpp, .h файлы

main.cpp

#include "foo.h"
#include "lib.h"
 
int main(int argc, char** argv)
{
    hello_world();
    hello_lib(argc, argv);
    return 0;
}

foo.h
```
void hello_world();
```

foo.cpp

#include <iostream>
void hello_world()
{
    std::cout << "Hello, World!" << std::endl;
}

lib.h
```
void hello_lib(int, char**);
```

lib.cpp

#include <boost/program_options/options_description.hpp>
#include <boost/program_options/option.hpp>
#include <boost/program_options/variables_map.hpp> 
#include <boost/program_options/parsers.hpp>
#include <iostream>
 
namespace po = boost::program_options;
 
void hello_lib(int argc, char** argv)
{
    po::options_description desc("Allowed options");
    desc.add_options()
        ("help, h", "This is help message")
        ;   
 
    po::variables_map vm; 
 
    try {
        po::store(po::parse_command_line(argc, argv, desc), vm);
        po::notify(vm);
    }   
    catch (const boost::wrapexcept<po::unknown_option>& e) {
        std::cerr << "Error: Unknown option: " << e.get_option_name() << std::endl;
        std::cerr << "Use --help for usage information." << std::endl;
    }   
 
    if (vm.count("help")) {
        std::cout << desc << "\n";
    }   
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(hello_world)
find_package( Boost 1.40 COMPONENTS program_options REQUIRED )
include_directories( ${Boost_INCLUDE_DIR} )
set(SOURCE_EXE main.cpp)
set(SOURCE_LIB foo.cpp lib.cpp)
add_library(src_lib STATIC ${SOURCE_LIB})
add_executable(main ${SOURCE_EXE})
target_link_libraries(main src_lib ${Boost_LIBRARIES})

Внешняя библиотека boost и подпроект foo

main.cpp

#include "foo.h"
#include "lib.h"
 
int main(int argc, char** argv)
{
    hello_world();
    hello_lib(argc, argv);
    return 0;
}

подпроект «foo», каталог «./foo/»:

foo.h
```
void hello_world();
```

foo.cpp

#include <iostream>
void hello_world()
{
    std::cout << "Hello, World!" << std::endl;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(foo)
set(SOURCE_LIB foo.cpp)
# build "foo" library
add_library(foo STATIC ${SOURCE_LIB})

lib.h
```
void hello_lib(int, char**);
```

lib.cpp

#include <boost/program_options/options_description.hpp>
#include <boost/program_options/option.hpp>
#include <boost/program_options/variables_map.hpp> 
#include <boost/program_options/parsers.hpp>
#include <iostream>
 
namespace po = boost::program_options;
 
void hello_lib(int argc, char** argv)
{
    po::options_description desc("Allowed options");
    desc.add_options()
        ("help, h", "This is help message")
        ;
 
    po::variables_map vm;
 
    try {
        po::store(po::parse_command_line(argc, argv, desc), vm);
        po::notify(vm);
    }
    catch (const boost::wrapexcept<po::unknown_option>& e) {
        std::cerr << "Error: Unknown option: " << e.get_option_name() << std::endl;
        std::cerr << "Use --help for usage information." << std::endl;
    }
 
    if (vm.count("help")) {
        std::cout << desc << "\n";
    }
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
 
project(hello_world)
 
find_package( Boost 1.40 COMPONENTS program_options REQUIRED )
include_directories( ${Boost_INCLUDE_DIR} )
 
include_directories(foo)
add_subdirectory(foo)
 
set(SOURCE_EXE main.cpp)
set(SOURCE_LIB lib.cpp)
 
add_library(src_lib STATIC ${SOURCE_LIB})
 
add_executable(main ${SOURCE_EXE})
target_link_libraries(main src_lib foo ${Boost_LIBRARIES})

Подпроект с внешней библиотекой boost и подпроект foo

main.cpp

#include "foo.h"
#include "lib.h"
 
int main(int argc, char** argv)
{
    hello_world();
    hello_lib(argc, argv);
    return 0;
}

подпроект «foo», каталог «./foo/»:

foo.h
```
void hello_world();
```

foo.cpp

#include <iostream>
void hello_world()
{
    std::cout << "Hello, World!" << std::endl;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(foo)
set(SOURCE_LIB foo.cpp)
# build "foo" library
add_library(foo STATIC ${SOURCE_LIB})

подпроект «lib», каталог «./lib/»:

lib.h
```
void hello_lib(int, char**);
```

lib.cpp

#include <boost/program_options/options_description.hpp>
#include <boost/program_options/option.hpp>
#include <boost/program_options/variables_map.hpp> 
#include <boost/program_options/parsers.hpp>
#include <iostream>
 
namespace po = boost::program_options;
 
void hello_lib(int argc, char** argv)
{
    po::options_description desc("Allowed options");
    desc.add_options()
        ("help, h", "This is help message")
        ;
 
    po::variables_map vm;
 
    try {
        po::store(po::parse_command_line(argc, argv, desc), vm);
        po::notify(vm);
    }
    catch (const boost::wrapexcept<po::unknown_option>& e) {
        std::cerr << "Error: Unknown option: " << e.get_option_name() << std::endl;
        std::cerr << "Use --help for usage information." << std::endl;
    }
 
    if (vm.count("help")) {
        std::cout << desc << "\n";
    }
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(lib)
find_package( Boost 1.40 COMPONENTS program_options REQUIRED )
include_directories( ${Boost_INCLUDE_DIR} )
set(SOURCE_LIB lib.cpp)
# build "lib" library
add_library(lib STATIC ${SOURCE_LIB})
target_link_libraries(lib ${Boost_LIBRARIES})

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(hello_world)
include_directories(foo)
add_subdirectory(foo)
include_directories(lib)
add_subdirectory(lib)
set(SOURCE_EXE main.cpp)
add_executable(main ${SOURCE_EXE})
target_link_libraries(main foo lib)

[Qt6] Hello, World

main.cpp

#include <QCoreApplication>
#include <QDebug>
 
int main(int argc, char** argv)
{
    QCoreApplication app(argc, argv);
    qDebug() << "Hello, World";
    return app.exec();
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(qt_hello_world)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_PREFIX_PATH "/opt/Qt/6.4.1/gcc_64/")
find_package(Qt6 REQUIRED COMPONENTS Core)
set(SOURCE_EXE main.cpp)
add_executable(main ${SOURCE_EXE})
target_link_libraries(main PRIVATE Qt6::Core)

[Qt6] Hello, World; подпроект

main.cpp

#include <QCoreApplication>
#include "lib/lib.h"
int main(int argc, char** argv)
{
    QCoreApplication app(argc, argv);
    qt_hello();
    return app.exec();
}

подпроект c библитекой Qt6 «lib», каталог «./lib/»:

файл lib.cpp

#include <QDebug>
void qt_hello() {
    qDebug() << "Hello, World";
}

файл lib.h
```
void qt_hello();
```

файл CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(qt_hello)
# Find Qt6 components required for this module
find_package(Qt6 REQUIRED COMPONENTS Core)
set(SOURCE_LIB lib.cpp)
add_library(lib STATIC ${SOURCE_LIB})
target_link_libraries(lib PRIVATE Qt6::Core)

CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(qt_hello_world)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_PREFIX_PATH "/opt/Qt/6.4.1/gcc_64/")
find_package(Qt6 REQUIRED COMPONENTS Core)
set(SOURCE_EXE main.cpp)
add_subdirectory(lib)
add_executable(main ${SOURCE_EXE})
target_link_libraries(main PRIVATE lib PRIVATE Qt6::Core)

—

По материалам:

статьи Введение в CMake с сайта habr.com ;
Craig Scott - Professional CMake: A Practical Guide;
Getting started with CMake руководства библиотеки Qt6.

Содержание

CMake для сборки проекта

Сборка проекта

Hello, World

Разделение кода на *.cpp и *.h файлы

Подпроект

Внешняя библиотека boost и *.cpp, *.h файлы

Внешняя библиотека boost и подпроект foo

Подпроект с внешней библиотекой boost и подпроект foo

[Qt6] Hello, World

[Qt6] Hello, World; подпроект

Разделение кода на .cpp и .h файлы

Внешняя библиотека boost и .cpp, .h файлы