Example of CMake export target

CMakeLists.txt

cmake_minimum_required(VERSION 3.0)
project(MyProject)

set(Sources
  ...
)

set(Headers
  ...
)

add_library(MyProject ${Sources})
target_include_directories(MyProject INTERFACE $<INSTALL_INTERFACE:include>) # or whatever the include directory is

# install header
install(FILES ${Headers} DESTINATION include)

# install the library
install(TARGETS MyProject
	EXPORT MyProject-targets
	LIBRARY DESTINATION lib
	ARCHIVE DESTINATION lib
)

# install export target and config for find_package
install(EXPORT MyProject-targets DESTINATION lib/cmake/MyProject)
include(CMakePackageConfigHelpers)
configure_package_config_file(
	"MyProjectConfig.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/MyProjectConfig.cmake"
	INSTALL_DESTINATION "lib/cmake/MyProject"
)
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/MyProjectConfig.cmake" DESTINATION "lib/cmake/MyProject")

MyProjectConfig.cmake.in

@PACKAGE_INIT@

include("${CMAKE_CURRENT_LIST_DIR}/MyProject-targets.cmake")