diff --git a/lib/compiler-rt/builtins/int_endianness.h b/lib/compiler-rt/builtins/int_endianness.h
index 7995ddb..291c6b5 100644
--- a/lib/compiler-rt/builtins/int_endianness.h
+++ b/lib/compiler-rt/builtins/int_endianness.h
@@ -1,51 +1,49 @@
-/* ===-- int_endianness.h - configuration header for compiler-rt ------------===
- *
- *		       The LLVM Compiler Infrastructure
- *
- * This file is dual licensed under the MIT and the University of Illinois Open
- * Source Licenses. See LICENSE.TXT for details.
- *
- * ===----------------------------------------------------------------------===
- *
- * This file is a configuration header for compiler-rt.
- * This file is not part of the interface of this library.
- *
- * ===----------------------------------------------------------------------===
- */
+//===-- int_endianness.h - configuration header for compiler-rt -----------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a configuration header for compiler-rt.
+// This file is not part of the interface of this library.
+//
+//===----------------------------------------------------------------------===//
 
 #ifndef INT_ENDIANNESS_H
 #define INT_ENDIANNESS_H
 
-#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
+#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) &&                \
     defined(__ORDER_LITTLE_ENDIAN__)
 
-/* Clang and GCC provide built-in endianness definitions. */
+// Clang and GCC provide built-in endianness definitions.
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 #define _YUGA_LITTLE_ENDIAN 0
-#define _YUGA_BIG_ENDIAN    1
+#define _YUGA_BIG_ENDIAN 1
 #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 #define _YUGA_LITTLE_ENDIAN 1
-#define _YUGA_BIG_ENDIAN    0
-#endif /* __BYTE_ORDER__ */
+#define _YUGA_BIG_ENDIAN 0
+#endif // __BYTE_ORDER__
 
-#else /* Compilers other than Clang or GCC. */
+#else // Compilers other than Clang or GCC.
 
 #if defined(__SVR4) && defined(__sun)
 #include <sys/byteorder.h>
 
 #if defined(_BIG_ENDIAN)
 #define _YUGA_LITTLE_ENDIAN 0
-#define _YUGA_BIG_ENDIAN    1
+#define _YUGA_BIG_ENDIAN 1
 #elif defined(_LITTLE_ENDIAN)
 #define _YUGA_LITTLE_ENDIAN 1
-#define _YUGA_BIG_ENDIAN    0
-#else /* !_LITTLE_ENDIAN */
+#define _YUGA_BIG_ENDIAN 0
+#else // !_LITTLE_ENDIAN
 #error "unknown endianness"
-#endif /* !_LITTLE_ENDIAN */
+#endif // !_LITTLE_ENDIAN
 
-#endif /* Solaris and AuroraUX. */
+#endif // Solaris
 
-/* .. */
+// ..
 
 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) ||   \
     defined(__minix)
@@ -53,64 +51,64 @@
 
 #if _BYTE_ORDER == _BIG_ENDIAN
 #define _YUGA_LITTLE_ENDIAN 0
-#define _YUGA_BIG_ENDIAN    1
+#define _YUGA_BIG_ENDIAN 1
 #elif _BYTE_ORDER == _LITTLE_ENDIAN
 #define _YUGA_LITTLE_ENDIAN 1
-#define _YUGA_BIG_ENDIAN    0
-#endif /* _BYTE_ORDER */
+#define _YUGA_BIG_ENDIAN 0
+#endif // _BYTE_ORDER
 
-#endif /* *BSD */
+#endif // *BSD
 
-#if defined(__OpenBSD__) || defined(__Bitrig__)
+#if defined(__OpenBSD__)
 #include <machine/endian.h>
 
 #if _BYTE_ORDER == _BIG_ENDIAN
 #define _YUGA_LITTLE_ENDIAN 0
-#define _YUGA_BIG_ENDIAN    1
+#define _YUGA_BIG_ENDIAN 1
 #elif _BYTE_ORDER == _LITTLE_ENDIAN
 #define _YUGA_LITTLE_ENDIAN 1
-#define _YUGA_BIG_ENDIAN    0
-#endif /* _BYTE_ORDER */
+#define _YUGA_BIG_ENDIAN 0
+#endif // _BYTE_ORDER
 
-#endif /* OpenBSD and Bitrig. */
+#endif // OpenBSD
 
-/* .. */
+// ..
 
-/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the
- * compiler (at least with GCC) */
-#if defined(__APPLE__) || defined(__ellcc__ )
+// Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the
+// compiler (at least with GCC)
+#if defined(__APPLE__) || defined(__ellcc__)
 
 #ifdef __BIG_ENDIAN__
 #if __BIG_ENDIAN__
 #define _YUGA_LITTLE_ENDIAN 0
-#define _YUGA_BIG_ENDIAN    1
+#define _YUGA_BIG_ENDIAN 1
 #endif
-#endif /* __BIG_ENDIAN__ */
+#endif // __BIG_ENDIAN__
 
 #ifdef __LITTLE_ENDIAN__
 #if __LITTLE_ENDIAN__
 #define _YUGA_LITTLE_ENDIAN 1
-#define _YUGA_BIG_ENDIAN    0
+#define _YUGA_BIG_ENDIAN 0
 #endif
-#endif /* __LITTLE_ENDIAN__ */
+#endif // __LITTLE_ENDIAN__
 
-#endif /* Mac OSX */
+#endif // Mac OSX
 
-/* .. */
+// ..
 
 #if defined(_WIN32)
 
 #define _YUGA_LITTLE_ENDIAN 1
-#define _YUGA_BIG_ENDIAN    0
+#define _YUGA_BIG_ENDIAN 0
 
-#endif /* Windows */
+#endif // Windows
 
-#endif /* Clang or GCC. */
+#endif // Clang or GCC.
 
-/* . */
+// .
 
 #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
 #error Unable to determine endian
-#endif /* Check we found an endianness correctly. */
+#endif // Check we found an endianness correctly.
 
-#endif /* INT_ENDIANNESS_H */
+#endif // INT_ENDIANNESS_H