--- old/./gif_hash.h	2019-03-19 22:15:10.865351100 -0700
+++ new/./gif_hash.h	2019-03-19 22:15:10.632299300 -0700
@@ -1,3 +1,27 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
 /******************************************************************************
 
 gif_hash.h - magfic constants and declarations for GIF LZW
@@ -7,7 +31,6 @@
 #ifndef _GIF_HASH_H_
 #define _GIF_HASH_H_
 
-#include <unistd.h>
 #include <stdint.h>
 
 #define HT_SIZE			8192	   /* 12bits = 4096 or twice as big! */