ac_arg_with_path_style

_AC_DEFINE(PATH_STYLE) describing the filesys interface. The value is numeric, where the basetype is encoded as 16 = dos/win, 32 = unix, 64 = url/www, 0 = other

some extra semantics are described in other bits of the value, especially 1024 accepts "/" as a dir separator 2048 accepts ";" as a path separator 4096 accepts "," as a path separator

the macro provides a configure' --with-path-style option that can be used with descriptive arg names. If not explicitly given, the $target_os will be checked to provide a sane default. Additional (lower) bits can be used by the user for some additional magic, higher bits are reserved for this macro.

the mnemonic "strict" or "also" is used to instruct the code that additional seperators shall be accepted but converted to the seperator of the underlying pathstyle system. (or-512)

example: --with-path-style=win,slash
          to make it accept ";" as pathsep, and
          both "/" and "\" as dirseps.

 
AC_DEFUN(AC_ARG_WITH_PATH_STYLE,
[
 AC_ARG_WITH(path-style,
[  --with-path-style=[dos,unix,url,also,slash,comma],
[ac_with_path_style="$withval"],
[dnl
  case "$target_os" in
    *djgpp | *mingw32* | *emx*) ac_with_path_style="dos" ;;
    *) case `eval echo $exec_prefix` in
       *:*) ac_with_path_style="url" ;;
       *) ac_with_path_style="posix" ;;
       esac
    ;;
  esac
])
   case ",$ac_with_path_style," in
    *,unx,*|*,unix,*|*,bsd,*|*,posix,*) :
	ac_with_path_style__unx="32" ;;
    *) 	ac_with_path_style__unx="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,dos,*|*,win,*|*,windows,*) :
	ac_with_path_style__dos="16" ;;
    *)  ac_with_path_style__dos="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,web,*|*,url,*|*,www,*) :
	ac_with_path_style__url="64" ;;
    *) 	ac_with_path_style__url="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,mac,*|*,macintosh,*|*,apple,*) :
	ac_with_path_style__mac="128" ;;
    *) 	ac_with_path_style__mac="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,def,*|*,define,*|*,special,*) :
	ac_with_path_style__def="256" ;;
    *) 	ac_with_path_style__def="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,also,*|*,strict,*|*,accept,*|*,convert,*) :
	ac_with_path_style__use="512" ;;
    *) 	ac_with_path_style__use="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,sl,*|*,slash,*|*,forwslash,*|*,slashsep,*) :
	ac_with_path_style__slash="1024" ;;
    *) 	ac_with_path_style__slash="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,sc,*|*,semi,*|*,semisep,*|*,semicolon,*|*,semicolonsep,*) :
	ac_with_path_style__semic="2048" ;;
    *) 	ac_with_path_style__semic="0" ;;
   esac
   case ",$ac_with_path_style," in
    *,cm,*|*,comma,*|*,commasep,*) :
	ac_with_path_style__comma="4096" ;;
    *) 	ac_with_path_style__comma="0" ;;
   esac

   if test "$ac_with_path_style__unx" != "0" ; then
	ac_with_path_style__slash="1024" 
   fi	
   if test "$ac_with_path_style__dos" != "0" ; then
	ac_with_path_style__semic="2048" 
   fi
   if test "$ac_with_path_style__url" != "0" ; then
	ac_with_path_style__slash="1024" 
	ac_with_path_style__semic="2048" 
   fi

   case ",$ac_with_path_style," in
    *,7,*|*,all,*|*,muchmore,*)  
	ac_with_path_style__level="7" ;;
    *,6,*|*,extra,*|*,manymore,*) 
	ac_with_path_style__level="6" ;;
    *,5,*|*,much,*) 
	ac_with_path_style__level="5" ;;
    *,4,*|*,many,*)
	ac_with_path_style__level="4" ;;
    *,3,*|*,plus,*|*,somemore,*) 
	ac_with_path_style__level="3" ;;
    *,2,*|*,more,*)
	ac_with_path_style__level="2" ;;
    *,1,*|*,some,*)
	ac_with_path_style__level="1" ;;
    *)
	ac_with_path_style__level="0" ;;
   esac

   PATH_STYLE=`expr \
	$ac_with_path_style__unx '+' \
	$ac_with_path_style__dos '+' \
	$ac_with_path_style__win '+' \
	$ac_with_path_style__mac '+' \
	$ac_with_path_style__def '+' \
	$ac_with_path_style__use '+' \
	$ac_with_path_style__slash '+' \
	$ac_with_path_style__semic '+' \
	$ac_with_path_style__comma '+' \
        $ac_with_path_style__level `

 AC_DEFINE_UNQUOTED(PATH_STYLE,$PATH_STYLE,
 [ the OS pathstyle, 16=dos 32=unx 64=url 1024=slash 2048=semic 4096=comma ])
])