1 files changed, 9 insertions, 0 deletions
diff --git a/src/pass.h b/src/pass.h
index 9ef159d7d..6116a9cca 100644
--- a/src/pass.h
+++ b/src/pass.h
@@ -76,6 +76,8 @@ struct PassOptions {
   bool debugInfo = false;
   // Which wasm features to accept, and be allowed to use.
   FeatureSet features = FeatureSet::All;
+  // Arbitrary string arguments from the commandline, which we forward to passes.
+  std::map<std::string, std::string> arguments;
 
   void setDefaultOptimizationOptions() {
     // -Os is our default
@@ -92,6 +94,13 @@ struct PassOptions {
   static PassOptions getWithoutOptimization() {
     return PassOptions(); // defaults are to not optimize
   }
+
+  std::string getArgument(std::string key, std::string errorTextIfMissing) {
+    if (arguments.count(key) == 0) {
+      Fatal() << errorTextIfMissing;
+    }
+    return arguments[key];
+  }
 };
 
 //