blas_sys::cgemv_

pub unsafe extern fn cgemv_(trans: *const c_char, m: *const c_int, n: *const c_int, alpha: *const complex_float, a: *const complex_float, lda: *const c_int, x: *const complex_float, incx: *const c_int, beta: *const complex_float, y: *mut complex_float, incy: *const c_int)