MACRO(ADD_TARGET_PROPERTIES _target _name _properties)
  SET(_properties ${ARGV})
  LIST(REMOVE_AT _properties 0)
  LIST(REMOVE_AT _properties 0)
  GET_TARGET_PROPERTY(_old_properties ${_target} ${_name})
  #MESSAGE("adding property to ${_target} ${_name}: ${_properties}")
  IF(NOT _old_properties)
    # in case it's NOTFOUND
    SET(_old_properties)
  ELSE(NOT _old_properties)
    SET(_old_properties "${_old_properties} ")
  ENDIF(NOT _old_properties)
  SET_TARGET_PROPERTIES(${_target} PROPERTIES ${_name} "${_old_properties}${_properties}")
ENDMACRO(ADD_TARGET_PROPERTIES)