macro(get_cxx_std_flags FLAGS_VARIABLE)
if( CMAKE_CXX_STANDARD_REQUIRED )
set(${FLAGS_VARIABLE} ${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION})
else()
set(${FLAGS_VARIABLE} ${CMAKE_CXX${CMAKE_CXX_STANDARD}_EXTENSION_COMPILE_OPTION})
endif()
endmacro()
