gccrs: derive(Clone): Use lang item for PhantomData in Clone

gcc/rust/ChangeLog:

	* expand/rust-derive-clone.cc (DeriveClone::visit_union): Create a lang item path
	instead of a regular path.

diff --git a/gcc/rust/expand/rust-derive-clone.cc b/gcc/rust/expand/rust-derive-clone.cc
index 8093bf67ff0ad7ec80199cc81b94faca8b178e3e..2f733fae9107d9ef7312cec51a26289bb9d5df0b 100644 (file)
--- a/gcc/rust/expand/rust-derive-clone.cc
+++ b/gcc/rust/expand/rust-derive-clone.cc
@@ -263,7 +263,7 @@ DeriveClone::visit_union (Union &item)
     {StructField (
       Identifier ("_t"),
       builder.single_generic_type_path (
-       "PhantomData",
+       LangItem::Kind::PHANTOM_DATA,
        GenericArgs (
          {}, {GenericArg::create_type (builder.single_type_path ("T"))}, {})),
       Visibility::create_private (), item.get_locus ())});