diff options
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/target_features.rs | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/compiler/rustc_codegen_ssa/src/target_features.rs b/compiler/rustc_codegen_ssa/src/target_features.rs index d8b9bdb55da..28c6932dd5b 100644 --- a/compiler/rustc_codegen_ssa/src/target_features.rs +++ b/compiler/rustc_codegen_ssa/src/target_features.rs @@ -87,7 +87,10 @@ pub(crate) fn from_target_feature_attr( // But ensure the ABI does not forbid enabling this. // Here we do assume that LLVM doesn't add even more implied features // we don't know about, at least no features that would have ABI effects! - if abi_feature_constraints.incompatible.contains(&name.as_str()) { + // We skip this check in rustdoc, like we skip all target feature related checks. + if !tcx.sess.opts.actually_rustdoc + && abi_feature_constraints.incompatible.contains(&name.as_str()) + { tcx.dcx().emit_err(errors::ForbiddenTargetFeatureAttr { span: item.span(), feature: name.as_str(), @@ -142,8 +145,11 @@ pub(crate) fn provide(providers: &mut Providers) { rust_target_features: |tcx, cnum| { assert_eq!(cnum, LOCAL_CRATE); if tcx.sess.opts.actually_rustdoc { - // rustdoc needs to be able to document functions that use all the features, so - // whitelist them all + // HACK: rustdoc would like to pretend that we have all the target features, so we + // have to merge all the lists into one. The result has a "random" stability + // (depending on the order in which we consider features); all places that check + // target stability are expected to check `actually_rustdoc` and do nothing when + // that is set. rustc_target::target_features::all_rust_features() .map(|(a, b)| (a.to_string(), b)) .collect() |