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+#serial 10 -*- autoconf -*-
+
+# Define some macros required for proper operation of code in lib/*.c
+# on MSDOS/Windows systems.
+
+# Copyright (C) 2000, 2001, 2004, 2005, 2006 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_TRY_COMPILE([],
+ [#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"$ac_cv_win_or_dos" = xyes; then
+ ac_fs_accepts_drive_letter_prefix=1
+ ac_fs_backslash_is_file_name_separator=1
+ AC_CACHE_CHECK([whether drive letter can start relative path],
+ [ac_cv_drive_letter_can_be_relative],
+ [
+ AC_TRY_COMPILE([],
+ [#if defined __CYGWIN__
+drive letters are always absolute
+#endif],
+ [ac_cv_drive_letter_can_be_relative=yes],
+ [ac_cv_drive_letter_can_be_relative=no])
+ ])
+ if test x"$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.])
+ ])