automake installs multiple versions which can be selected with WANT_AUTOMAKE=xxx WANT_AUTCONF has a different syntax (WANT_AUTCONF_xxx=1) which is unexpected and less intuitive. Reproducible: Always Steps to Reproduce: 1. export WANT_AUTOMAKE=1.7; emerge automake; automake --version 2. export WANT_AUTOCONF=2.5; emerge autoconf; autoconf --version 3. export WANT_AUTOCONF_2_5=1; emerge autoconf; autoconf --version Actual Results: 1.: automake (GNU automake) 1.7.7 Written by Tom Tromey <tromey@redhat.com>. ... 2.: Autoconf version 2.13 3.: autoconf (GNU Autoconf) 2.57a Written by David J. MacKenzie and Akim Demaille. ... Expected Results: export WANT_AUTOCONF=2.5; emerge autoconf; autoconf --version autoconf (GNU Autoconf) 2.57a Written by David J. MacKenzie and Akim Demaille. ... I would even more expect that "emerge autoconf" results in the installation of the most current autoconf as default.
Changed for autoconf-2.58.