title: build constraints exclude all Go files in
body: <p>when import     "golang.org/x/net/route"</p>
  
  <p>it tells 
  "build constraints exclude all Go files in go/src/golang.org/x/net/routego"</p>
  
  <p>I am using VSCode editor on Windows/Linux</p>
  
  <p>I searched online and didn't see a solution to the similar problem</p>
  
  <pre><code>package main
  
  import (
      "golang.org/x/net/route"
  )
  
  {
      rib, _ := route.FetchRIB(0, route.RIBTypeRoute, 0)
      messages, err := route.ParseRIB(route.RIBTypeRoute, rib)
  }
  </code></pre>