Adding TMXParser as a library to a CLion project using CMake - c++

Question

My friend & I are trying to build a small game & game-engine using SDL2. We decided to use CLion along with CMake for the compilation & linking procedures. We now want to use the TMXParser but we want to make sure that:
We can use TMXParser as a library in our project and that
If someone grabs our project from, i.e., GitHub, that they too will have all the necessary files.
How can we achieve these goals using CMake?
Our current CMakeLists.txt:
cmake_minimum_required(VERSION 3.24)
project(CS454)
# set variables
set(CMAKE_CXX_STANDARD 17)
set(SDL2_INCLUDE_DIR "$ENV{SDL2_INCLUDE_DIR_PATH}") # points to the include dir of SDL
set(SDL2_LIB_DIR "$ENV{SDL2_LIB_DIR_PATH}") # point to the libraries of SDL (x64 for 64bit, x86 for 32bit)
set(ENGINE_SOURCES main.cpp utils/src/JsonParser.cpp utils/include/JsonParser.h Engine/src/App.h Engine/src/entities/Entity.cpp Engine/src/entities/Entity.h Engine/src/game/Game.cpp Engine/src/game/Game.h Engine/src/map/MapManager.cpp Engine/src/map/MapManager.h) #specify source files required by the engine
include_directories(${SDL2_INCLUDE_DIR}) # from the docs: Add the given directories to those the compiler uses to search for include files.
link_directories(${SDL2_LIB_DIR}) # from the docs: Adds the paths in which the linker should search for libraries.
find_package(PkgConfig REQUIRED) #Add the jsoncpp module
pkg_check_modules(JSONCPP jsoncpp)
link_libraries(${JSONCPP_LIBRARIES})
# unit test libs
add_library(ut1 UnitTests/UnitTest1/TileManager.cpp UnitTests/UnitTest1/TileManager.h)
#main render library
add_library(screenElement UnitTests/UnitTest1/ScreenElement.cpp UnitTests/UnitTest1/ScreenElement.h)
# unit test executables
add_executable(unit-test-1 UnitTests/UnitTest1/ReadTextMap.cpp)
# game engine executable
add_executable(CS454 ${ENGINE_SOURCES})
# link unit test lib(s) with executable
target_link_libraries(unit-test-1 ut1 screenElement SDL2)
# engine executable linking
target_link_libraries(${PROJECT_NAME} screenElement SDL2main SDL2 SDL2_image ut1 ${JSONCPP_LIBRARIES})