================
@@ -574,6 +574,9 @@ Expected<StringRef> clang(ArrayRef<StringRef> InputFiles, 
const ArgList &Args,
   if (Args.hasArg(OPT_embed_bitcode))
     CmdArgs.push_back("-Wl,--lto-emit-llvm");
 
+  if (Args.hasArg(OPT_allow_multiple_definition))
+    CmdArgs.push_back("-Wl,--allow-multiple-definition");
+
----------------
abidh wrote:

> Fixing it this way by default would degrade diagnostics for every user.

I don't understand this comment. If a user passes 
`-Wl,--allow-multiple-definition`, should the option not be forwarded to device 
linker.

https://github.com/llvm/llvm-project/pull/182282
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