m4/dos.m4

   1 #serial 5
   2
   3 # Define some macros required for proper operation of code in lib/*.c
   4 # on MSDOS/Windows systems.
   5
   6 # From Jim Meyering.
   7
   8 AC_DEFUN([jm_AC_DOS],
   9   [
  10     AC_CACHE_CHECK([whether system is Windows or MSDOS], [ac_cv_win_or_dos],
  11       [
  12         AC_TRY_COMPILE([],
  13         [#if !defined _WIN32 && !defined __WIN32__ && !defined __MSDOS__
  14 neither MSDOS nor Windows
  15 #endif],
  16         [ac_cv_win_or_dos=yes],
  17         [ac_cv_win_or_dos=no])
  18       ])
  19
  20     if test x"$ac_cv_win_or_dos" = xyes; then
  21       ac_fs_accepts_drive_letter_prefix=1
  22       ac_fs_backslash_is_file_name_separator=1
  23     else
  24       ac_fs_accepts_drive_letter_prefix=0
  25       ac_fs_backslash_is_file_name_separator=0
  26     fi
  27
  28     AH_VERBATIM(FILESYSTEM_PREFIX_LEN,
  29     [#if FILESYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX
  30 # define FILESYSTEM_PREFIX_LEN(Filename) \
  31   ((Filename)[0] && (Filename)[1] == ':' ? 2 : 0)
  32 #else
  33 # define FILESYSTEM_PREFIX_LEN(Filename) 0
  34 #endif])
  35
  36     AC_DEFINE_UNQUOTED([FILESYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX],
  37       $ac_fs_accepts_drive_letter_prefix,
  38       [Define on systems for which file names may have a so-called
  39        `drive letter' prefix, define this to compute the length of that
  40        prefix, including the colon.])
  41
  42     AH_VERBATIM(ISSLASH,
  43     [#if FILESYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR
  44 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
  45 #else
  46 # define ISSLASH(C) ((C) == '/')
  47 #endif])
  48
  49     AC_DEFINE_UNQUOTED([FILESYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR],
  50       $ac_fs_backslash_is_file_name_separator,
  51       [Define if the backslash character may also serve as a file name
  52        component separator.])
  53   ])