--- a/include/filenames.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/include/filenames.h	Fri Oct 27 22:46:09 2017 +0900
@@ -5,7 +5,7 @@
    use forward- and back-slash in path names interchangeably, and
    some of them have case-insensitive file names.
 
-   Copyright 2000, 2001, 2007, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
 
 This file is part of BFD, the Binary File Descriptor library.
 
@@ -26,6 +26,8 @@
 #ifndef FILENAMES_H
 #define FILENAMES_H
 
+#include "hashtab.h" /* for hashval_t */
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -34,10 +36,18 @@
 #  ifndef HAVE_DOS_BASED_FILE_SYSTEM
 #    define HAVE_DOS_BASED_FILE_SYSTEM 1
 #  endif
+#  ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
+#    define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
+#  endif
 #  define HAS_DRIVE_SPEC(f) HAS_DOS_DRIVE_SPEC (f)
 #  define IS_DIR_SEPARATOR(c) IS_DOS_DIR_SEPARATOR (c)
 #  define IS_ABSOLUTE_PATH(f) IS_DOS_ABSOLUTE_PATH (f)
 #else /* not DOSish */
+#  if defined(__APPLE__)
+#    ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
+#      define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
+#    endif
+#  endif /* __APPLE__ */
 #  define HAS_DRIVE_SPEC(f) (0)
 #  define IS_DIR_SEPARATOR(c) IS_UNIX_DIR_SEPARATOR (c)
 #  define IS_ABSOLUTE_PATH(f) IS_UNIX_ABSOLUTE_PATH (f)
@@ -76,6 +86,12 @@
 extern int filename_ncmp (const char *s1, const char *s2,
 			  size_t n);
 
+extern hashval_t filename_hash (const void *s);
+
+extern int filename_eq (const void *s1, const void *s2);
+
+extern int canonical_filename_eq (const char *a, const char *b);
+
 #ifdef __cplusplus
 }
 #endif