1// Copyright 2023 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build netgo && netcgo
6
7package net
8
9func init() {
10	// This will give a compile time error about the unused constant.
11	// The advantage of this approach is that the gc compiler
12	// actually prints the constant, making the problem obvious.
13	"Do not use both netgo and netcgo build tags."
14}
15