whatever happened to io.popen() ?

[Asko Kauppi <asko.kauppi@...>]

[iMac:~/TestBox/Sources/luax-perforce] asko% ./luax
out_darwin/luax -l kernel.lua -v  -ehelp() -i
out_darwin/luax: kernel.lua:114: attempt to call field `popen' (a nil 
value)
stack traceback:
        kernel.lua:114: in main chunk
        [C]: ?


I got LuaX to compile with 5.1w1, but.. you know what I mean? :)