[clang] [CodeGen][ObjC] Initial WebAssembly Support for GNUstep (PR #169043)

[Hugo Melder via cfe-commits]

================
@@ -179,8 +179,14 @@ class CGObjCGNU : public CGObjCRuntime {
       (R.getVersion() >= VersionTuple(major, minor));
   }
 
-  std::string ManglePublicSymbol(StringRef Name) {
-    return (StringRef(CGM.getTriple().isOSBinFormatCOFF() ? "$_" : "._") + Name).str();
+  const std::string ManglePublicSymbol(StringRef Name) {
+    StringRef prefix = "._"
+
+        // Exported symbols in Emscripten must be a valid Javascript identifier.
+        auto triple = CGM.getTriple();
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hmelder wrote:

The problem is the missing semicolon :)

```c
StringRef prefix = "._"
```

https://github.com/llvm/llvm-project/pull/169043