Warn when linking a plugin into a non-plugin crate

Fixes #22202.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/test/auxiliary/plugin_with_plugin_lib.rs b/src/test/auxiliary/plugin_with_plugin_lib.rs
new file mode 100644
index 00000000000..cfc8c015324
--- /dev/null
+++ b/src/test/auxiliary/plugin_with_plugin_lib.rs
@@ -0,0 +1,22 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// force-host
+
+#![feature(plugin_registrar)]
+#![deny(plugin_as_library)] // should have no effect in a plugin crate
+
+extern crate macro_crate_test;
+extern crate rustc;
+
+use rustc::plugin::Registry;
+
+#[plugin_registrar]
+pub fn plugin_registrar(_: &mut Registry) { }