From af39c0c57cb23678daaeb75ea729edd71aba14b8 Mon Sep 17 00:00:00 2001
From: xizheyin <xizheyin@smail.nju.edu.cn>
Date: Thu, 10 Jul 2025 14:17:10 +0800
Subject: Emit warning when there is no space between `-o` and confusing arg

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>
---
 compiler/rustc_session/src/config.rs | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'compiler/rustc_session/src')

diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 4627c2978fc..7f2f5f1c5a4 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -1653,6 +1653,11 @@ impl RustcOptGroup {
             OptionKind::FlagMulti => options.optflagmulti(short_name, long_name, desc),
         };
     }
+
+    /// This is for diagnostics-only.
+    pub fn long_name(&self) -> &str {
+        self.long_name
+    }
 }
 
 pub fn make_opt(
-- 
cgit 1.4.1-3-g733a5