Improved feature-generation to be compiler-based

lib/compiler-singlepass/src/config.rs

@@ -3,6 +3,7 @@
 
 use crate::compiler::SinglepassCompiler;
 use std::sync::Arc;
+use wasm_common::Features;
 use wasmer_compiler::{Compiler, CompilerConfig, CpuFeature, FunctionMiddlewareGenerator, Target};
 
 #[derive(Clone)]
@@ -57,6 +58,13 @@ impl CompilerConfig for Singlepass {
         Box::new(SinglepassCompiler::new(&self))
     }
 
+    /// Gets the default features for this compiler in the given target
+    fn default_features_for_target(&self, target: &Target) -> Features {
+        let mut features = Features::default();
+        features.multi_value(false);
+        features
+    }
+
     /// Pushes a middleware onto the back of the middleware chain.
     fn push_middleware(&mut self, middleware: Arc<dyn FunctionMiddlewareGenerator>) {
         self.middlewares.push(middleware);