Index: libc/include/uchar.h.def
===================================================================
--- /dev/null
+++ libc/include/uchar.h.def
@@ -0,0 +1,16 @@
+//===---------------- C standard library header uchar.h ------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_UCHAR_H
+#define LLVM_LIBC_UCHAR_H
+
+#include <__llvm-libc-common.h>
+
+%%public_api()
+
+#endif // LLVM_LIBC_UCHAR_H