title: CMake: include Lemon library
body: <p>I just want to add the Lemon library to my CMakeLists.txt. When I was not using CMake I just added "-lemon" and everything went fine, but now I don't know the procedure to add that to the CMake file.</p>
  
  <p>Edited do include my <strong>CMakeLists.txt</strong>:</p>
  
  <pre><code># Created by the script cgal_create_cmake_script_with_options
  # This is the CMake script for compiling a set of CGAL applications.
  
  project( ssp )
  
  
  cmake_minimum_required(VERSION 2.6.2)
  if("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_GREATER 2.6)
    if("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION}" VERSION_GREATER 2.8.3)
      cmake_policy(VERSION 2.8.4)
    else()
      cmake_policy(VERSION 2.6)
    endif()
  endif()
  
  set( CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true )
  
  if ( COMMAND cmake_policy )
  
    cmake_policy( SET CMP0003 NEW )  
  
  endif()
  
  # CGAL and its components
  find_package( CGAL QUIET COMPONENTS  )
  
  if ( NOT CGAL_FOUND )
  
    message(STATUS "This project requires the CGAL library, and will not be compiled.")
    return()  
  
  endif()
  
  # include helper file
  include( ${CGAL_USE_FILE} )
  
  
  # Boost and its components
  find_package( Boost REQUIRED )
  
  if ( NOT Boost_FOUND )
  
    message(STATUS "This project requires the Boost library, and will not be compiled.")
  
    return()  
  
  endif()
  
  # include for local directory
  
  # include for local package
  
  set(CMAKE_CXX_FLAGS "-lemon")
  
  
  # Creating entries for target: ssp
  # ############################
  
  add_executable( ssp  arrangement.cpp main.cpp polygonOperations.cpp scheduleGraph.cpp )
  
  add_to_cached_list( CGAL_EXECUTABLE_TARGETS ssp )
  
  # Link the executable to CGAL and third-party libraries
  target_link_libraries(ssp   lemon ${CGAL_LIBRARIES} ${CGAL_3RD_PARTY_LIBRARIES} )
  </code></pre>