Cannot properly link the libraries in CMakeLists - cmake

Question

I have some troubles with linking the source files (I have added them as Libraries in my CMakeLists) with my main file. Here is my 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 ${RapidJSON_LIBRARIES})
So when the compiler tries to link my main file (which is ros_bridge_node) I get the error with the linkage:
ros_client.cpp:(.text+0x605): undefined reference to `awsiotsdk::util::Logging::GetLogSystem()'
ros_client.cpp:(.text+0x66d): undefined reference to `awsiotsdk::ResponseHelper::ToString[abi:cxx11](awsiotsdk::ResponseCode)'
CMakeFiles/ros_bridge_node.dir/src/ros_client.cpp.o: In function `ros_bridge::RosClient::RunPublish(int&)':
ros_client.cpp:(.text+0x8d9): undefined reference to `awsiotsdk::Utf8String::Create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_push'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `awsiotsdk::NetworkConnection::Read(std::vector<unsigned char, std::allocator<unsigned char> >&, unsigned long, unsigned long, unsigned long&)'
/home/abyl/master-wheel/devel/lib/libConfigCommon.so: undefined reference to `awsiotsdk::util::JsonParser::InitializeFromJsonFile(rapidjson::GenericDocument<rapidjson::UTF8<char>, rapidjson::MemoryPoolAllocator<rapidjson::CrtAllocator>, rapidjson::CrtAllocator>&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `SHA1'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_f_base64'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `awsiotsdk::network::OpenSSLConnection::IsPhysicalLayerConnected()'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_set_flags'
/home/abyl/master-wheel/devel/lib/libWebSocket.so: undefined reference to `BIO_new'
So how can I properly link the libraries against my Main file?
EDIT:
I have set the object files of aws_iot_sdk like this:
set(${aws_sdk} /home/ren/aws-iot-device-sdk-cpp/build/CMakeFiles/aws-iot-sdk-cpp.dir/src)
set_source_files_properties(
${aws_sdk_path}
PROPERTIES
EXTERNAL_OBJECT true
GENERATED true
)
And tried to link that against my main file:
target_link_libraries(ros_bridge_node ros_client ConfigCommon Open WebSocket wslay ${RapidJSON_LIBRARIES} ${catkin_LIBRARIES} -lssl ${aws_sdk})
But still getting the same linkage problem. May be I am linking the object files wrong? (Now all the linkage problem is from the aws_iot_sdk)