There's a bug in configure.in -- in AC_ARG_WITH(x, ...), the true and false strings are reversed. It should read "no_x=1, nox_=0", rather than "no_x=0, no_x=1" on line 72.
This is fixed in fresh new YTalk 3.2.0, available at http://www.impul.se/ytalk/ Note that --with-x is changed to --enable-x Seemant, btw, you got my last name wrong in the ChangeLog ;)
but Andreas, it's GOOD to be King :P fixed in portage.