title: Cmake and library linker flags for bluetooth
body: <p>I am trying to compile a .cpp program with CMAKE.
  When I was simply using gcc on terminal I needed to type:</p>
  
  <pre><code>gcc nxt_bt_connect.c -o nxt_bt_connect -lm -lbluetooth
  </code></pre>
  
  <p>How do I include these two linker flags to my CmakeLists.txt (pasted below) file?</p>
  
  <pre><code># YARP needs CMake 2.6 or greater
  cmake_minimum_required(VERSION 2.6)
  # find YARP
  find_package(YARP REQUIRED)
  # add YARP include directories
  include_directories(${YARP_INCLUDE_DIRS})
  # set up our program
  add_executable(send_angles send_angles.cpp)
  # link with YARP libraries
  target_link_libraries(send_angles ${YARP_LIBRARIES})
  </code></pre>
  
  <p>Thank you!!</p>