Function sp_dtrsv 

pub unsafe extern "C" fn sp_dtrsv(
    uplo: *mut c_char,
    trans: *mut c_char,
    diag: *mut c_char,
    L: *mut SuperMatrix,
    U: *mut SuperMatrix,
    x: *mut c_double,
    stat: *mut SuperLUStat_t,
    info: *mut c_int,
) -> c_int