--- a/gcc/dwarf2asm.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/dwarf2asm.h	Fri Oct 27 22:46:09 2017 +0900
@@ -1,6 +1,5 @@
 /* Dwarf2 assembler output helper routines.
-   Copyright (C) 2001, 2003, 2005, 2007, 2008, 2010
-   Free Software Foundation, Inc.
+   Copyright (C) 2001-2017 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -18,6 +17,8 @@
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_DWARF2ASM_H
+#define GCC_DWARF2ASM_H
 
 extern void dw2_assemble_integer (int, rtx);
 
@@ -39,6 +40,10 @@
 				   const char *, ...)
      ATTRIBUTE_NULL_PRINTF_4;
 
+extern void dw2_asm_output_offset (int, const char *, HOST_WIDE_INT,
+				   section *, const char *, ...)
+     ATTRIBUTE_NULL_PRINTF_5;
+
 extern void dw2_asm_output_addr (int, const char *, const char *, ...)
      ATTRIBUTE_NULL_PRINTF_3;
 
@@ -87,3 +92,5 @@
 					  const char *, ...)
      ATTRIBUTE_NULL_PRINTF_3;
 #endif
+
+#endif /* GCC_DWARF2ASM_H */