OPT_CALLBACK_DEFAULT
OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
OPT_CALLBACK_DEFAULT('g', "call-graph", &callchain_param,
OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]",
OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT",
OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]",
OPT_CALLBACK_DEFAULT('g', "call-graph", &callchain_param,
OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",