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1 #serial 11 -*- autoconf -*-
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2
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3 # Define some macros required for proper operation of code in lib/*.c
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4 # on MSDOS/Windows systems.
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5
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6 # Copyright (C) 2000-2001, 2004-2006, 2009-2010 Free Software Foundation, Inc.
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7 # This file is free software; the Free Software Foundation
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8 # gives unlimited permission to copy and/or distribute it,
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9 # with or without modifications, as long as this notice is preserved.
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10
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11 # From Jim Meyering.
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12
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13 AC_DEFUN([gl_AC_DOS],
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14 [
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15 AC_CACHE_CHECK([whether system is Windows or MSDOS], [ac_cv_win_or_dos],
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16 [
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17 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
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18 #if !defined _WIN32 && !defined __WIN32__ && !defined __MSDOS__ && !defined __CYGWIN__
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19 neither MSDOS nor Windows
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20 #endif]])],
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21 [ac_cv_win_or_dos=yes],
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22 [ac_cv_win_or_dos=no])
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23 ])
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24
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25 if test x"$ac_cv_win_or_dos" = xyes; then
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26 ac_fs_accepts_drive_letter_prefix=1
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27 ac_fs_backslash_is_file_name_separator=1
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28 AC_CACHE_CHECK([whether drive letter can start relative path],
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29 [ac_cv_drive_letter_can_be_relative],
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30 [
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31 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
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32 #if defined __CYGWIN__
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33 drive letters are always absolute
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34 #endif]])],
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35 [ac_cv_drive_letter_can_be_relative=yes],
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36 [ac_cv_drive_letter_can_be_relative=no])
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37 ])
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38 if test x"$ac_cv_drive_letter_can_be_relative" = xyes; then
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39 ac_fs_drive_letter_can_be_relative=1
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40 else
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41 ac_fs_drive_letter_can_be_relative=0
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42 fi
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43 else
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44 ac_fs_accepts_drive_letter_prefix=0
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45 ac_fs_backslash_is_file_name_separator=0
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46 ac_fs_drive_letter_can_be_relative=0
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47 fi
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48
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49 AC_DEFINE_UNQUOTED([FILE_SYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX],
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50 $ac_fs_accepts_drive_letter_prefix,
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51 [Define on systems for which file names may have a so-called
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52 `drive letter' prefix, define this to compute the length of that
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53 prefix, including the colon.])
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54
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55 AH_VERBATIM(ISSLASH,
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56 [#if FILE_SYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR
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57 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
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58 #else
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59 # define ISSLASH(C) ((C) == '/')
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60 #endif])
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61
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62 AC_DEFINE_UNQUOTED([FILE_SYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR],
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63 $ac_fs_backslash_is_file_name_separator,
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64 [Define if the backslash character may also serve as a file name
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65 component separator.])
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66
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67 AC_DEFINE_UNQUOTED([FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE],
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68 $ac_fs_drive_letter_can_be_relative,
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69 [Define if a drive letter prefix denotes a relative path if it is
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70 not followed by a file name component separator.])
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71 ])
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