--- a/libiberty/crc32.c	Sun Aug 21 07:07:55 2011 +0900
+++ b/libiberty/crc32.c	Fri Oct 27 22:46:09 2017 +0900
@@ -1,5 +1,5 @@
 /* crc32.c
-   Copyright (C) 2009, 2011 Free Software Foundation, Inc.
+   Copyright (C) 2009-2017 Free Software Foundation, Inc.
 
    This file is part of the libiberty library.
 
@@ -33,15 +33,14 @@
 
 #include "libiberty.h"
 
-/* This table was generated by the following program.  This matches
-   what gdb does.
+/* This table was generated by the following program.
 
    #include <stdio.h>
 
    int
    main ()
    {
-     int i, j;
+     unsigned int i, j;
      unsigned int c;
      int table[256];
 
@@ -146,10 +145,9 @@
 data split across multiple buffers by passing the return value of each
 call as the @var{init} parameter of the next.
 
-This is intended to match the CRC used by the @command{gdb} remote
-protocol for the @samp{qCRC} command.  In order to get the same
-results as gdb for a block of data, you must pass the first CRC
-parameter as @code{0xffffffff}.
+This is used by the @command{gdb} remote protocol for the @samp{qCRC}
+command.  In order to get the same results as gdb for a block of data,
+you must pass the first CRC parameter as @code{0xffffffff}.
 
 This CRC can be specified as: