Index: llvm/trunk/include/llvm/BinaryFormat/Wasm.h
===================================================================
--- llvm/trunk/include/llvm/BinaryFormat/Wasm.h
+++ llvm/trunk/include/llvm/BinaryFormat/Wasm.h
@@ -145,6 +145,7 @@
   StringRef Name;
   uint8_t Kind;
   uint32_t Flags;
+  StringRef Module; // For undefined symbols the module name of the import
   union {
     // For function or global symbols, the index in function or global index
     // space.
Index: llvm/trunk/lib/Object/WasmObjectFile.cpp
===================================================================
--- llvm/trunk/lib/Object/WasmObjectFile.cpp
+++ llvm/trunk/lib/Object/WasmObjectFile.cpp
@@ -412,6 +412,7 @@
         wasm::WasmImport &Import = *ImportedFunctions[Info.ElementIndex];
         FunctionType = &Signatures[Import.SigIndex];
         Info.Name = Import.Field;
+        Info.Module = Import.Module;
       }
       break;