Index: src/Validate/Autogen.cpp
===================================================================
--- src/Validate/Autogen.cpp	(revision fc134a48a40512fa2957765975077ee1bb642ba2)
+++ src/Validate/Autogen.cpp	(revision 5a076837fe88f7ae75814e4afc7e03da772b8f58)
@@ -183,7 +183,9 @@
 	{
 		// TODO: These functions are somewhere between instrinsic and autogen,
-		// could possibly use a new linkage type. For now we just make them
-		// intrinsic to code-gen them as C assignments.
-		proto_linkage = ast::Linkage::Intrinsic;
+		// could possibly use a new linkage type. For now we just make the
+		// basic ones intrinsic to code-gen them as C assignments.
+		const auto & real_type = decl->base;
+		const auto & basic = real_type.as<ast::BasicType>();
+		if(!real_type || (basic && basic->isInteger())) proto_linkage = ast::Linkage::Intrinsic;
 	}
 
@@ -402,8 +404,4 @@
 	auto retval = srcParam();
 	retval->name = "_ret";
-	// xxx - Adding this unused attribute can slience unused variable warning
-	// However, some code might not be compiled as expected
-	// Temporarily disabled
-	// retval->attributes.push_back(new ast::Attribute("unused"));
 	return genProto( "?=?", { dstParam(), srcParam() }, { retval } );
 }