From 3f2ca47a79911d422fd47ee2a23dd08a9fa42aa9 Mon Sep 17 00:00:00 2001
From: est31 <MTest31@outlook.com>
Date: Tue, 30 Jun 2020 20:17:07 +0200
Subject: Gate the printing on --json=unused-externs

---
 compiler/rustc_metadata/src/creader.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'compiler/rustc_metadata/src')

diff --git a/compiler/rustc_metadata/src/creader.rs b/compiler/rustc_metadata/src/creader.rs
index 3f2d312e61b..7b34374032c 100644
--- a/compiler/rustc_metadata/src/creader.rs
+++ b/compiler/rustc_metadata/src/creader.rs
@@ -931,8 +931,9 @@ impl<'a> CrateLoader<'a> {
                     diag,
                 );
         }
-        // FIXME: add gating
-        self.sess.parse_sess.span_diagnostic.emit_unused_externs(&unused_externs);
+        if self.sess.opts.json_unused_externs {
+            self.sess.parse_sess.span_diagnostic.emit_unused_externs(&unused_externs);
+        }
     }
 
     pub fn postprocess(&mut self, krate: &ast::Crate) {
-- 
cgit 1.4.1-3-g733a5