From: Tanaka Akira Date: 2013-03-28T07:12:32+09:00 Subject: [ruby-core:53781] Re: [ruby-trunk - Bug #8179][Open] configure.in requires newer Autoconf than specified by AC_PREREQ 2013/3/28 edelsohn (David Edelsohn) : > Bug #8179: configure.in requires newer Autoconf than specified by AC_PREREQ > https://bugs.ruby-lang.org/issues/8179 > 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. It seems autoconf 2.63 works on CentOS: http://c5664.rubyci.org/~chkbuild/ruby-trunk/log/20130327T190301Z.log.html.gz#autoconf-version http://c5632.rubyci.org/~chkbuild/ruby-trunk/log/20130327T190322Z.log.html.gz#autoconf-version -- Tanaka Akira