1 files changed, 11 insertions, 1 deletions
diff --git a/src/wasm/wasm-emscripten.cpp b/src/wasm/wasm-emscripten.cpp
index 0c02c758e..3f521caf9 100644
--- a/src/wasm/wasm-emscripten.cpp
+++ b/src/wasm/wasm-emscripten.cpp
@@ -789,7 +789,8 @@ void printSet(std::ostream& o, C& c) {
 }
 
 std::string EmscriptenGlueGenerator::generateEmscriptenMetadata(
-    Address staticBump, std::vector<Name> const& initializerFunctions) {
+    Address staticBump, std::vector<Name> const& initializerFunctions,
+    FeatureSet features) {
   bool commaFirst;
   auto nextElement = [&commaFirst]() {
     if (commaFirst) {
@@ -926,6 +927,15 @@ std::string EmscriptenGlueGenerator::generateEmscriptenMetadata(
     }
   });
   meta << "\n  ]\n";
+
+  meta << "  \"features\": [";
+  commaFirst = true;
+  meta << nextElement() << "\"--mvp-features\"";
+  features.iterFeatures([&](FeatureSet::Feature f) {
+    meta << nextElement() << "\"--enable-" << FeatureSet::toString(f) << '"';
+  });
+  meta << "\n  ]\n";
+
   meta << "}\n";
 
   return meta.str();