Warn when -C extra-filename flag is used with -o

rust-lang · Jan 29, 2018 · 9a2f02d · 9a2f02d
1 parent d97da7d
commit 9a2f02d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/librustc_driver/driver.rs b/src/librustc_driver/driver.rs
@@ -1378,6 +1378,9 @@ pub fn build_output_filenames(input: &Input,
             if *odir != None {
                 sess.warn("ignoring --out-dir flag due to -o flag.");
             }
+            if !sess.opts.cg.extra_filename.is_empty() {
+                sess.warn("ignoring -C extra-filename flag due to -o flag.");
+            }
 
             let cur_dir = Path::new("");