Function gsl_sys::gsl_blas_dtrmv

pub unsafe extern "C" fn gsl_blas_dtrmv(
    Uplo: CBLAS_UPLO_t, 
    TransA: CBLAS_TRANSPOSE_t, 
    Diag: CBLAS_DIAG_t, 
    A: *const gsl_matrix, 
    X: *mut gsl_vector
) -> c_int