remove file not in upstream we may no longer need

diff --git a/m4/dos.m4 b/m4/dos.m4
deleted file mode 100644 (file)
index 5660542..0000000
--- a/m4/dos.m4
+++ /dev/null
@@ -1,71 +0,0 @@
-#serial 11   -*- autoconf -*-
-
-# Define some macros required for proper operation of code in lib/*.c
-# on MSDOS/Windows systems.
-
-# Copyright (C) 2000-2001, 2004-2006, 2009-2010 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# From Jim Meyering.
-
-AC_DEFUN([gl_AC_DOS],
-  [
-    AC_CACHE_CHECK([whether system is Windows or MSDOS], [ac_cv_win_or_dos],
-      [
-        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
-#if !defined _WIN32 && !defined __WIN32__ && !defined __MSDOS__ && !defined __CYGWIN__
-neither MSDOS nor Windows
-#endif]])],
-        [ac_cv_win_or_dos=yes],
-        [ac_cv_win_or_dos=no])
-      ])
-
-    if test x"$ac_cv_win_or_dos" = xyes; then
-      ac_fs_accepts_drive_letter_prefix=1
-      ac_fs_backslash_is_file_name_separator=1
-      AC_CACHE_CHECK([whether drive letter can start relative path],
-                     [ac_cv_drive_letter_can_be_relative],
-        [
-          AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
-#if defined __CYGWIN__
-drive letters are always absolute
-#endif]])],
-          [ac_cv_drive_letter_can_be_relative=yes],
-          [ac_cv_drive_letter_can_be_relative=no])
-        ])
-      if test x"$ac_cv_drive_letter_can_be_relative" = xyes; then
-        ac_fs_drive_letter_can_be_relative=1
-      else
-        ac_fs_drive_letter_can_be_relative=0
-      fi
-    else
-      ac_fs_accepts_drive_letter_prefix=0
-      ac_fs_backslash_is_file_name_separator=0
-      ac_fs_drive_letter_can_be_relative=0
-    fi
-
-    AC_DEFINE_UNQUOTED([FILE_SYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX],
-      $ac_fs_accepts_drive_letter_prefix,
-      [Define on systems for which file names may have a so-called
-       `drive letter' prefix, define this to compute the length of that
-       prefix, including the colon.])
-
-    AH_VERBATIM(ISSLASH,
-    [#if FILE_SYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR
-# define ISSLASH(C) ((C) == '/' || (C) == '\\')
-#else
-# define ISSLASH(C) ((C) == '/')
-#endif])
-
-    AC_DEFINE_UNQUOTED([FILE_SYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR],
-      $ac_fs_backslash_is_file_name_separator,
-      [Define if the backslash character may also serve as a file name
-       component separator.])
-
-    AC_DEFINE_UNQUOTED([FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE],
-      $ac_fs_drive_letter_can_be_relative,
-      [Define if a drive letter prefix denotes a relative path if it is
-       not followed by a file name component separator.])
-  ])