From ba22fbe58494784e3ee2a6800bb16588da2f595b Mon Sep 17 00:00:00 2001
From: khyperia <github@khyperia.com>
Date: Mon, 5 Oct 2020 09:46:03 +0200
Subject: [PATCH] Add -Z codegen-backend dylib to deps

When the codegen-backend dylib changes, the program should be rebuilt.
---
 compiler/rustc_interface/src/passes.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 66d3765d34739..d9c24cc399482 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -551,6 +551,10 @@ fn write_out_deps(
             .map(|fmap| escape_dep_filename(&fmap.unmapped_path.as_ref().unwrap_or(&fmap.name)))
             .collect();
 
+        if let Some(ref backend) = sess.opts.debugging_opts.codegen_backend {
+            files.push(backend.to_string());
+        }
+
         if sess.binary_dep_depinfo() {
             boxed_resolver.borrow().borrow_mut().access(|resolver| {
                 for cnum in resolver.cstore().crates_untracked() {