title: Recompile all packages after upgrading Go?
body: <p>After I upgraded Go, how do I make sure all my packages in <code>$GOPATH/pkg</code> and binaries in <code>$GOPATH/bin</code> are recompiled using the new version ? </p>
  
  <p>I would like that any upgrade errors are reported as warnings, not errors causing the operation to abort. </p>