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