1macro(get_cxx_std_flags FLAGS_VARIABLE)
2  if( CMAKE_CXX_STANDARD_REQUIRED )
3    set(${FLAGS_VARIABLE} ${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION})
4  else()
5    set(${FLAGS_VARIABLE} ${CMAKE_CXX${CMAKE_CXX_STANDARD}_EXTENSION_COMPILE_OPTION})
6  endif()
7endmacro()
8