cmake problem

cmake_minimum_required (VERSION 2.8)

project( plate )

SET(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++11")

#Boost include start
find_package (Boost COMPONENTS date_time thread filesystem)
include_directories (${Boost_INCLUDE_DIRS})
link_directories(${Boost_LIBRARY_DIR})
#set (ADDITIONAL_LIBS ${ADDITIONAL_LIBS} ${Boost_LIBRARIES})
#Boost include end

add_executable( plate plate.cpp )

target_link_libraries (plate ${Boost_LIBRARIES})
#target_link_libraries (${PROJECT} ${ADDITIONAL_LIBS})