无法正确链接CMakeLists中的库

我在将源文件（我已将它们作为库添加到我的CmakeList中）与主文件链接时遇到一些问题。这是我的

CMakeLists

：

cmake_minimum_required(VERSION 2.8.3)
project(ros_bridge)

set(${PROJECT_NAME}_CATKIN_COMPONENTS
  nav_msgs
  roscpp
  sensor_msgs
  std_msgs
)

add_compile_options(-std=c++14)

find_package(catkin REQUIRED COMPONENTS ${${PROJECT_NAME}_CATKIN_COMPONENTS})
find_package(RapidJSON REQUIRED)

catkin_package(
  INCLUDE_DIRS
    include
    include/aws_iot_sdk
    include/common
    include/network
  CATKIN_DEPENDS ${${PROJECT_NAME}_CATKIN_COMPONENTS}
)


include_directories(
  include
  include/aws_iot_sdk
  ${catkin_INCLUDE_DIRS}
)

## Libraries

add_library(ros_client src/ros_client.cpp)
add_library(ConfigCommon include/common/ConfigCommon.cpp)
add_library(OpenSSL include/network/OpenSSL/OpenSSLConnection.cpp)
add_library(WebSocket include/network/WebSocket/WebSocketConnection.cpp)

add_executable(ros_bridge_node src/main.cpp)

## Lib links
target_link_libraries(ros_client ConfigCommon ${catkin_LIBRARIES} ${RapidJSON_LIBRARIES} OpenSSL WebSocket)
target_link_libraries(ConfigCommon ${catkin_LIBRARIES} ${RapidJSON_LIBRARIES} OpenSSL WebSocket)

target_link_libraries(ros_bridge_node ${catkin_LIBRARIES} ros_client ConfigCommon OpenSSL WebSocket ${RapidJSON_LIBRARIES})

因此，当编译器尝试链接我的主文件（即

ros\u bridge\u node

）时，我得到链接错误：

ros_client.cpp:(.text+0x605): undefined reference to `awsiotsdk::util::Logging::GetLogSystem()'
ros_client.cpp:(.text+0x66d): undefined reference to `awsiotsdk::ResponseHelper::ToString[abi:cxx11](awsiotsdk::ResponseCode)'
CMakeFiles/ros_bridge_node.dir/src/ros_client.cpp.o: In function `ros_bridge::RosClient::RunPublish(int&)':
ros_client.cpp:(.text+0x8d9): undefined reference to `awsiotsdk::Utf8String::Create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_push'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `awsiotsdk::NetworkConnection::Read(std::vector<unsigned char, std::allocator<unsigned char> >&, unsigned long, unsigned long, unsigned long&)'
/home/abyl/master-wheel/devel/lib/libConfigCommon.so: undefined reference to `awsiotsdk::util::JsonParser::InitializeFromJsonFile(rapidjson::GenericDocument<rapidjson::UTF8<char>, rapidjson::MemoryPoolAllocator<rapidjson::CrtAllocator>, rapidjson::CrtAllocator>&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `SHA1'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_f_base64'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `awsiotsdk::network::OpenSSLConnection::IsPhysicalLayerConnected()'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_set_flags'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_new'

并试图将其链接到我的主文件：

target_link_libraries(ros_bridge_node ros_client ConfigCommon Open WebSocket wslay ${RapidJSON_LIBRARIES} ${catkin_LIBRARIES} -lssl ${aws_sdk})

---

但仍然有同样的联系问题。可能是我链接的对象文件错误？（现在所有的链接问题都来自于

aws\u iot\u sdk

）

@Tsyvarev我认为

未定义的引用

发生在您不链接库时？您的错误主要是抱怨

awsiotsdk

中的定义。你包括这个目录，但我看不到你在哪里链接到它的库。是否有

aws\u iot\u sdk

库？如果是这样，您可以尝试在调用

target\u link\u libraries（）

？squareskittles我已经编辑了我的问题，请查找assign

aws\u sdk

变量使用命令

set（aws\u sdk…

），这里取消引用

${aws\u sdk}

是错误的。另外请注意，在

target\u link\u libraries

call中，您需要指定库。没有一个目录包含它们。链接器没有“链接该目录中的所有库”选项。至于

未定义的引用

，我刚刚发现

/home/abyl/master wheel/devel/lib/libWebSocket。因此

库实际上是在您的项目中构建的，而不是3d方（预先创建的）。不要介意我的第一条评论（目前已删除）。

target_link_libraries(ros_bridge_node ros_client ConfigCommon Open WebSocket wslay ${RapidJSON_LIBRARIES} ${catkin_LIBRARIES} -lssl ${aws_sdk})