I usually use the same one that they originally generated configure from. It's often a comment in some of the files.
Annoyingly, I've ran into the situation a few times where version X.Y works fine, but X.Y-1 and X.Y+1 are full of fail :(. On 2015 Sep 10 (Thu) at 13:59:56 -0700 (-0700), patrick keshishian wrote: :Hi, : :Is there any preference/rule as to which version of autoconf :one should use in a new port? : :One with the largest version number or the lowest one :which works? : :--patrick : -- With all the fancy scientists in the world, why can't they just once build a nuclear balm?