diff options
Diffstat (limited to 'compiler/rustc_codegen_ssa/src')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/codegen_attrs.rs | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs index dac7d2e89b1..8542bab689d 100644 --- a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs +++ b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs @@ -103,7 +103,22 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs { codegen_fn_attrs.flags |= CodegenFnAttrFlags::ALLOCATOR_ZEROED } sym::naked => codegen_fn_attrs.flags |= CodegenFnAttrFlags::NAKED, - sym::no_mangle => codegen_fn_attrs.flags |= CodegenFnAttrFlags::NO_MANGLE, + sym::no_mangle => { + if tcx.opt_item_name(did.to_def_id()).is_some() { + codegen_fn_attrs.flags |= CodegenFnAttrFlags::NO_MANGLE + } else { + tcx.sess + .struct_span_err( + attr.span, + format!( + "`#[no_mangle]` cannot be used on {} {} as it has no name", + tcx.def_descr_article(did.to_def_id()), + tcx.def_descr(did.to_def_id()), + ), + ) + .emit(); + } + } sym::no_coverage => codegen_fn_attrs.flags |= CodegenFnAttrFlags::NO_COVERAGE, sym::rustc_std_internal_symbol => { codegen_fn_attrs.flags |= CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL |