Function r_core::r_cons_log_stub

pub unsafe extern "C" fn r_cons_log_stub(
    output: *const c_char, 
    funcname: *const c_char, 
    filename: *const c_char, 
    lineno: c_uint, 
    level: c_uint, 
    tag: *const c_char, 
    fmtstr: *const c_char,
     ...
)