Function 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)