From 3c171f420084b2db590a938dcaaaad3fd92ef287 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Wed, 11 Mar 2026 10:38:21 -0700
Subject: [PATCH] [ELF,test] Add test for -u error message referencing object
 file (#185938)

When -u creates an undefined symbol and a relocatable file has a weak
reference, the error message references the relocatable file, not
<internal>.
---
 lld/test/ELF/weak-undef-lib.s | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lld/test/ELF/weak-undef-lib.s b/lld/test/ELF/weak-undef-lib.s
index 8f89c6f421ad..5192893615dd 100644
--- a/lld/test/ELF/weak-undef-lib.s
+++ b/lld/test/ELF/weak-undef-lib.s
@@ -33,6 +33,12 @@
 # CHECK-U:      Section:
 # CHECK-U-SAME:          .text
 
+## When the definition is not available, the error references the object file,
+## not <internal>.
+# RUN: not ld.lld -u foo %t1.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-UERR
+# CHECK-UERR:      error: undefined symbol: foo
+# CHECK-UERR-NEXT: >>> referenced by {{.*}}1.o
+
 .weak foo
 call foo@PLT