Gentoo's Bugzilla –
Attachment 328736 Details for
Bug 442242mail-client/evolution-2.32-r1 with sys-devel/automake-1.12 - /usr/share/automake-1.12/am/ltlibrary.am: warning: 'libevolution-a11y.la': linking libtool libraries using a non-POSIX archiver requires 'AM_PROG_AR' in 'configure.ac' while processing ...