Function cusolverDnZungtr_bufferSize 

pub unsafe extern "C" fn cusolverDnZungtr_bufferSize(
    handle: cusolverDnHandle_t,
    uplo: cublasFillMode_t,
    n: c_int,
    A: *const cuDoubleComplex,
    lda: c_int,
    tau: *const cuDoubleComplex,
    lwork: *mut c_int,
) -> cusolverStatus_t