Link PahoMqttCpp 作为 CMake 中使用 Conan 的静态库

Question

我正在开发 C++ Web 框架，oatpp 以创建 REST API。使用 oatpp-starter 项目，其中 CMakeLists.txt 看起来像：

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)

我在具有相同体系结构的容器中成功编译此代码后获得的可执行文件运行s。但是当我将 paho-mqtt 库添加到项目时，可执行文件不会运行在容器上，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：已更新 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 Conan 下载的 PahoMqttCpp 库构建独立项目可执行文件（使用静态库）

Answer 1

事情是这样的：我错误地配置了 CMakeLists.txt 以与 conan 集成。由于我事先安装了 paho-mqtt-cpp，该程序链接到已安装的库，而不是柯南提供的库。

这个 CMakeLists.txt 适合我：

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 命令即可生成 Makefile。然后运行make得到可执行文件

Link PahoMqttCpp 作为 CMake 中使用 Conan 的静态库

Link PahoMqttCpp as a static library in CMake using Conan

c++

cmake

paho

conan