generalize 'forbidden feature' concept so that even (un)stable feature can be invalid to toggle

Also rename some things for extra clarity

1 files changed, 5 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 9f552b3feb9..75f5b32daaa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -175,7 +175,11 @@ impl CodegenBackend for CraneliftCodegenBackend {
         }
     }
 
-    fn target_features(&self, sess: &Session, _allow_unstable: bool) -> Vec<rustc_span::Symbol> {
+    fn target_features_cfg(
+        &self,
+        sess: &Session,
+        _allow_unstable: bool,
+    ) -> Vec<rustc_span::Symbol> {
         // FIXME return the actually used target features. this is necessary for #[cfg(target_feature)]
         if sess.target.arch == "x86_64" && sess.target.os != "none" {
             // x86_64 mandates SSE2 support