Usage: /usr/lib/erlang/erts-16.4.0.7/bin/yielding_c_fun [-h] [-log_max_mem_usage log_file] [(( -f | -frec | -fnoauto | -fextenal) function_name)... [-output_file_name output_file] [-header_file_name header_file] [-debug] [-only_yielding_funs] [-static_aux_funs] input_c_file]] Please see the README.md file for more details.