c++ - 使用柯南将 PahoMqttCpp 链接为 CMake 中的静态库

Question

我正在开发一个 C++ Web 框架，oatpp以创建 REST API。使用如下所示的oatpp-starter项目CMakeLists.txt：

cmake_minimum_required(VERSION 3.1)

set(project_name my-project) ## rename your project here

project(${project_name})

set(CMAKE_CXX_STANDARD 11)

add_library(${project_name}-lib
        src/AppComponent.hpp
        src/controller/MyController.cpp
        src/controller/MyController.hpp
        src/dto/DTOs.hpp
)

## link libs

find_package(oatpp 1.2.5 REQUIRED)

target_link_libraries(${project_name}-lib
        PUBLIC oatpp::oatpp
        PUBLIC oatpp::oatpp-test
)

target_include_directories(${project_name}-lib PUBLIC src)

## add executables

add_executable(${project_name}-exe
        src/App.cpp
        test/app/MyApiTestClient.hpp)
target_link_libraries(${project_name}-exe ${project_name}-lib)
add_dependencies(${project_name}-exe ${project_name}-lib)

add_executable(${project_name}-test
        test/tests.cpp
        test/app/TestComponent.hpp
        test/app/MyApiTestClient.hpp
        test/MyControllerTest.cpp
        test/MyControllerTest.hpp
)

target_link_libraries(${project_name}-test ${project_name}-lib)
add_dependencies(${project_name}-test ${project_name}-lib)

set_target_properties(${project_name}-lib ${project_name}-exe ${project_name}-test PROPERTIES
        CXX_STANDARD 11
        CXX_EXTENSIONS OFF
        CXX_STANDARD_REQUIRED ON
)

enable_testing()
add_test(project-tests ${project_name}-test)

编译此代码后获得的可执行文件在具有相同架构的容器中成功运行。但是当我将paho-mqtt库添加到项目中时，可执行文件不会在容器上运行，因为the shared library libpaho-mqttcpp3.so.1 not found: No such file or directory错误。

我正在使用此配置添加库：更新CMakeLists.txt：

cmake_minimum_required(VERSION 3.1)

set(project_name my-project) ## rename your project here

project(${project_name})

set(CMAKE_CXX_STANDARD 11)

add_library(${project_name}-lib
        src/AppComponent.hpp
        src/controller/MyController.cpp
        src/controller/MyController.hpp
        src/dto/DTOs.hpp
)

## link libs

find_package(oatpp 1.2.5 REQUIRED)

target_link_libraries(${project_name}-lib
        PUBLIC oatpp::oatpp
        PUBLIC oatpp::oatpp-test
)


## conan
include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup(TARGETS)

target_include_directories(${project_name}-lib PUBLIC src)

## add executables

add_executable(${project_name}-exe
        src/App.cpp
        test/app/MyApiTestClient.hpp)
target_link_libraries(${project_name}-exe ${project_name}-lib ${CONAN_LIBS})
add_dependencies(${project_name}-exe ${project_name}-lib)

add_executable(${project_name}-test
        test/tests.cpp
        test/app/TestComponent.hpp
        test/app/MyApiTestClient.hpp
        test/MyControllerTest.cpp
        test/MyControllerTest.hpp
)

target_link_libraries(${project_name}-test ${project_name}-lib ${CONAN_LIBS})
add_dependencies(${project_name}-test ${project_name}-lib)

set_target_properties(${project_name}-lib ${project_name}-exe ${project_name}-test PROPERTIES
        CXX_STANDARD 11
        CXX_EXTENSIONS OFF
        CXX_STANDARD_REQUIRED ON
)

enable_testing()
add_test(project-tests ${project_name}-test)

这是conanfile.txt

[requires]
paho-mqtt-cpp/1.2.0     # MQTT Client

[generators]
cmake

如何配置 CMake 以使用柯南下载的 PahoMqttCpp 库来构建独立项目可执行文件（使用静态库）

标签： c++cmakepahoconan

Answer 1

这就是发生的事情：我CMakeLists.txt错误地配置为与conan. 由于我paho-mqtt-cpp事先安装了，程序链接到已安装的库而不是柯南提供的库。

这CMakeLists.txt对我有用：

cmake_minimum_required(VERSION 3.1)
set(PROJECT_NAME my-awesome-project)
project(${PROJECT_NAME})

set(CMAKE_CXX_STANDARD 14)

############################### CONAN SETUP BEGIN ##########################################
if(NOT EXISTS "${CMAKE_BINARY_DIR}/conan.cmake")
    message(STATUS "Downloading conan.cmake from https://github.com/conan-io/cmake-conan")
    file(DOWNLOAD "https://raw.githubusercontent.com/conan-io/cmake-conan/v0.9/conan.cmake"
            "${CMAKE_BINARY_DIR}/conan.cmake")
endif()
include(${CMAKE_BINARY_DIR}/conan.cmake)
conan_cmake_run(CONANFILE conanfile.txt BASIC_SETUP)
############################### CONAN SETUP END ############################################

add_library(${PROJECT_NAME}-lib
        # controllers
        src/controller/StaticController.hpp

        # db
        src/db/DemoDb.hpp

        # mqtt
        src/mqtt/MqttCoroutine.hpp
        src/mqtt/MqttClient.hpp

        # dto
        src/dto/PageDto.hpp
        src/dto/StatusDto.hpp
        src/dto/DemoDto.hpp

        # services
        src/service/DemoService.cpp
        src/service/DemoService.hpp

        # base
        src/AppComponent.hpp
        src/DatabaseComponent.hpp
        src/ErrorHandler.cpp
        src/ErrorHandler.hpp)

## include directories
target_include_directories(${PROJECT_NAME}-lib PUBLIC src)


add_definitions(
        ## SQLite database file
        -DDATABASE_FILE="${CMAKE_CURRENT_SOURCE_DIR}/sql/db.sqlite"

        ## SQLite database test file
        -DTESTDATABASE_FILE="${CMAKE_CURRENT_SOURCE_DIR}/sql/test-db.sqlite"

        ## Path to database migration scripts
        -DDATABASE_MIGRATIONS="${CMAKE_CURRENT_SOURCE_DIR}/sql"

        ## my-awesome-project Service
        -DHOST="0.0.0.0"
        -DPORT=8080

        ## MQTT Broker
        -DMQTT_BROKER_URL="tcp://127.0.0.1:1883"
)

if(CMAKE_SYSTEM_NAME MATCHES Linux)
    find_package(Threads REQUIRED)
    target_link_libraries(${PROJECT_NAME}-lib INTERFACE Threads::Threads ${CMAKE_DL_LIBS})
endif()

## add executables
add_executable(${PROJECT_NAME}-exe src/App.cpp)
target_link_libraries(${PROJECT_NAME}-exe ${PROJECT_NAME}-lib ${CONAN_LIBS})

add_executable(${PROJECT_NAME}-test
        test/tests.cpp
        test/app/TestClient.hpp
        test/app/TestDatabaseComponent.hpp
        test/app/TestComponent.hpp
        test/DeviceControllerTest.hpp
        test/DeviceControllerTest.cpp)

target_link_libraries(${PROJECT_NAME}-test ${PROJECT_NAME}-lib ${CONAN_LIBS})

enable_testing()
add_test(e2e-tests ${PROJECT_NAME}-test)

伴随着这个conanfile.txt

[requires]
oatpp/1.2.5             # REST library
oatpp-sqlite/1.2.5      # SQLite3 plugin
paho-mqtt-cpp/1.2.0     # MQTT Client

[generators]
cmake

只需使用常规cmake命令生成Makefile. 然后运行make以获取可执行文件。