[lld] [LLD][Cygwin] Implement --dll-search-prefix (PR #143263)

[via llvm-commits]

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@@ -553,6 +554,9 @@ bool link(ArrayRef<const char *> argsArr, llvm::raw_ostream &stdoutOS,
     searchPaths.push_back(a->getValue());
     add("-libpath:" + StringRef(a->getValue()));
   }
+  StringRef dllPrefix = "lib";
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jeremyd2019 wrote:

```suggestion

  StringRef dllPrefix = "lib";
```

https://github.com/llvm/llvm-project/pull/143263