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diff --git a/contrib/llvm-project/clang/lib/Headers/builtins.h b/contrib/llvm-project/clang/lib/Headers/builtins.h
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+/*===---- builtins.h - Standard header for extra builtins -----------------===*\
+ *
+ * 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
+ *
+\*===----------------------------------------------------------------------===*/
+
+/// Some legacy compilers have builtin definitions in a file named builtins.h.
+/// This header file has been added to allow compatibility with code that was
+/// written for those compilers. Code may have an include line for this file
+/// and to avoid an error an empty file with this name is provided.
+#ifndef __BUILTINS_H
+#define __BUILTINS_H
+
+#if defined(__MVS__) && __has_include_next(<builtins.h>)
+#include_next <builtins.h>
+#endif /* __MVS__ */
+#endif /* __BUILTINS_H */