Add lib*.so to cmake - c++

Question

I've my package with CMakeLists.txt and I have a libNewLib.so compiled from another package from another library (NewLib). I've also the header files of that library that I include like so:
set(LIB_MANUALLY "${CMAKE_CURRENT_SOURCE_DIR}/lib/") #I put the file libNewLib.so here
include_directories(
include/NewLib
)
LINK_DIRECTORIES(${LIB_MANUALLY})
target_link_libraries(estimation libNewLib.so)
But I still get the error:
/usr/bin/ld: cannot find -lNewLib
Is it the correct way to do it?
I tried a couple of solutions but it didn't work.
I'm using Ros kinetic catkin package
make VERSION 2.8.3
Full CMakeLists.txt:
cmake_minimum_required(VERSION 2.8.3)
project(localization)
add_compile_options(-std=c++11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Ofast -march=native")
set(LIB_MANUALLY "${CMAKE_CURRENT_SOURCE_DIR}/lib/")
message(STATUS "LIB_MANUALLY : ${LIB_MANUALLY}")
find_package(catkin REQUIRED COMPONENTS
cv_bridge
image_transport
roscpp
rospy
std_msgs
)
find_package(OpenCV REQUIRED
NO_MODULE # should be optional, tells CMake to use config mode
PATHS /usr/local # look here
NO_DEFAULT_PATH) # and don't look anywhere else
catkin_package(
# INCLUDE_DIRS include
# LIBRARIES localization
CATKIN_DEPENDS cv_bridge image_transport roscpp rospy std_msgs
# DEPENDS system_lib
)
include_directories(
include
include/NewLib
${catkin_INCLUDE_DIRS}
${OpenCV_INCLUDE_DIRS}
)
add_executable(estimation
src/pose_map_estimation.cpp
src/pose_map_estimation_main.cpp
)
target_link_libraries(estimation ${catkin_LIBRARIES} ${OpenCV_LIBRARIES} libNewLib.so)
LINK_DIRECTORIES(${LIB_MANUALLY})

Answer 1

In https://cmake.org/cmake/help/v3.0/command/link_directories.html it says:
Specify the paths in which the linker should search for libraries. The command will apply only to targets created after it is called.
So, try if it works if you create the target AFTER the link_directories command.
You could also consider to write a proper cmake file for locating your library and use find_package to find it.