blas_sys::c::cblas_zgemv

pub unsafe extern fn cblas_zgemv(layout: CBLAS_LAYOUT, transa: CBLAS_TRANSPOSE, m: c_int, n: c_int, alpha: *const c_double_complex, a: *const c_double_complex, lda: c_int, x: *const c_double_complex, incx: c_int, beta: *const c_double_complex, y: *mut c_double_complex, incy: c_int)