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diff --git a/gprof/gmon_out.h b/gprof/gmon_out.h
index c9638692e9..234e4538a6 100644
--- a/gprof/gmon_out.h
+++ b/gprof/gmon_out.h
@@ -1,46 +1,46 @@
-/*
- * This file specifies the format of gmon.out files.  It should have
- * as few external dependencies as possible as it is going to be
- * included in many different programs.  That is, minimize the
- * number of #include's.
- *
- * A gmon.out file consists of a header (defined by gmon_hdr) followed
- * by a sequence of records.  Each record starts with a one-byte tag
- * identifying the type of records, followed by records specific data.
- */
+/* gmon_out.h
+
+   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+/* A gmon.out file consists of a header (defined by gmon_hdr) followed
+   by a sequence of records.  Each record starts with a one-byte tag
+   identifying the type of records, followed by records specific data.  */
 #ifndef gmon_out_h
 #define gmon_out_h
 
 #define	GMON_MAGIC	"gmon"	/* magic cookie */
 #define GMON_VERSION	1	/* version number */
 
-/*
- * Raw header as it appears on file (without padding):
- */
-struct gmon_hdr {
-    char	cookie[4];
-    char	version[4];
-    char	spare[3*4];
-};
-
-/* types of records in this file: */
-typedef enum {
-    GMON_TAG_TIME_HIST, GMON_TAG_CG_ARC, GMON_TAG_BB_COUNT
-} GMON_Record_Tag;
-
-struct gmon_hist_hdr {
-    char low_pc[sizeof(bfd_vma)];	/* base pc address of sample buffer */
-    char high_pc[sizeof(bfd_vma)];	/* max pc address of sampled buffer */
-    char hist_size[4];			/* size of sample buffer */
-    char prof_rate[4];			/* profiling clock rate */
-    char dimen[15];			/* phys. dim., usually "seconds" */
-    char dimen_abbrev;			/* usually 's' for "seconds" */
-};
-
-struct gmon_cg_arc_record {
-    char from_pc[sizeof(bfd_vma)];	/* address within caller's body */
-    char self_pc[sizeof(bfd_vma)];	/* address within callee's body */
-    char count[4];			/* number of arc traversals */
-};
+/* Raw header as it appears on file (without padding).  */
+struct gmon_hdr
+  {
+    char cookie[4];
+    char version[4];
+    char spare[3 * 4];
+  };
+
+/* Types of records in this file.  */
+typedef enum
+  {
+    GMON_TAG_TIME_HIST = 0, GMON_TAG_CG_ARC = 1, GMON_TAG_BB_COUNT = 2
+  }
+GMON_Record_Tag;
 
 #endif /* gmon_out_h */