[clang] Fix undefined lld::wasm::link symbol while building clangInterpreter for wasm (PR #113446)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Anutosh Bhat (anutosh491)

<details>
<summary>Changes</summary>

While building llvm (clang, lld) for wasm using emscripten (recipe hosted on emscripten-forge https://github.com/emscripten-forge/recipes/tree/main/recipes/recipes_emscripten/llvm) I ended up with this error 
```
 │ │ wasm-ld: error: ../../../../lib/libclangInterpreter.a(Wasm.cpp.o): undefined symbol: lld::wasm::link(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm:
 │ │ :raw_ostream&, bool, bool)
 ```
 This is due to the link function here 
 https://github.com/llvm/llvm-project/blob/a4819bd46d8baebc3aaa8b38f78065de33593199/clang/lib/Interpreter/Wasm.cpp#L25-L30
 
 This was added through this PR (https://github.com/llvm/llvm-project/pull/86402) as an attempt to support running clang-repl and executing C++ code interactively inside a Javascript engine using WebAssembly when built with Emscripten.
 
 The definition for link is present in lldwasm and when building for the emscripten platform we should be linking against it.
 

---
Full diff: https://github.com/llvm/llvm-project/pull/113446.diff


1 Files Affected:

- (modified) clang/lib/Interpreter/CMakeLists.txt (+2) 


``````````diff
diff --git a/clang/lib/Interpreter/CMakeLists.txt b/clang/lib/Interpreter/CMakeLists.txt
index 2cc7c59b61d318..d5ffe78251d253 100644
--- a/clang/lib/Interpreter/CMakeLists.txt
+++ b/clang/lib/Interpreter/CMakeLists.txt
@@ -14,6 +14,7 @@ set(LLVM_LINK_COMPONENTS
 
 if (EMSCRIPTEN AND "lld" IN_LIST LLVM_ENABLE_PROJECTS)
   set(WASM_SRC Wasm.cpp)
+  set(WASM_LINK lldWasm)
 endif()
 
 add_clang_library(clangInterpreter
@@ -44,6 +45,7 @@ add_clang_library(clangInterpreter
   clangParse
   clangSema
   clangSerialization
+  ${WASM_LINK}
   )
 
 if ((MINGW OR CYGWIN) AND BUILD_SHARED_LIBS)

``````````

</details>


https://github.com/llvm/llvm-project/pull/113446