Issue #8179 has been updated by naruse (Yui NARUSE). Status changed from Feedback to Closed As far as we know, 2.64 and 2.66 are buggy, so we bumped AC_PRE_REQ to 2.67 (Debian Squeeze uses this) at r40034, thanks. ---------------------------------------- Bug #8179: configure.in requires newer Autoconf than specified by AC_PREREQ https://bugs.ruby-lang.org/issues/8179#change-38106 Author: edelsohn (David Edelsohn) Status: Closed Priority: Normal Assignee: Category: Target version: ruby -v: trunk configure.in states AC_PREREQ(2.62) but building with Autoconf-2.64 fails due to missing feature. configure in releases are created using Autoconf-2.69 and that worked on trunk. I do not know the absolute minimum requirement, but 2.62 no longer is correct. -- http://bugs.ruby-lang.org/