[clang] [clang-repl] Implement LoadDynamicLibrary for clang-repl wasm use cases (PR #133037)

[Vassil Vassilev via cfe-commits]

================
@@ -711,6 +712,14 @@ llvm::Error Interpreter::Undo(unsigned N) {
 }
 
 llvm::Error Interpreter::LoadDynamicLibrary(const char *name) {
+#ifdef __EMSCRIPTEN__
+  void *handle = dlopen(name, RTLD_NOW | RTLD_GLOBAL);
+  if (!handle) {
+    llvm::errs() << dlerror() << '\n';
+    return llvm::make_error<llvm::StringError>("Failed to load dynamic 
library",
+                                               llvm::inconvertibleErrorCode());
+  }
+#else
----------------
vgvassilev wrote:

Why we can’t improve llvm::orc::DynamicLibrarySearchGenerator::Load?

cc: @lhames 

https://github.com/llvm/llvm-project/pull/133037
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