Function add_local_real_reloption

pub unsafe fn add_local_real_reloption(
    arg_opts: *mut local_relopts,
    arg_name: *const c_char,
    arg_desc: *const c_char,
    arg_default_val: f64,
    arg_min_val: f64,
    arg_max_val: f64,
    arg_offset: c_int,
)