Function newunit 

pub unsafe extern "C" fn newunit(
    unitname: *mut c_char,
    unitdef: *mut c_char,
    count: *mut c_int,
    linenum: c_int,
    file: *mut c_char,
    errfile: *mut FILE,
    redefine: c_int,
    userunit: c_int,
) -> c_int