• argp : flute-receiver.cpp , flute-transmitter.cpp
• argp_program_bug_address : flute-receiver.cpp , flute-transmitter.cpp
• argp_program_version_hook : flute-receiver.cpp , flute-transmitter.cpp
• args_doc : flute-transmitter.cpp
• doc : flute-receiver.cpp , flute-transmitter.cpp
• options : flute-receiver.cpp , flute-transmitter.cpp