***** automake *****
***** PWD: /var/tmp/portage/x11-plugins/wmhdplop-0.9.11/work/wmhdplop-0.9.11
***** automake --add-missing --copy --force-missing

configure.ac:3: error: version mismatch.  This is Automake 1.16.3,
configure.ac:3: but the definition used by this AM_INIT_AUTOMAKE
configure.ac:3: comes from Automake 1.15.1.  You should recreate
configure.ac:3: aclocal.m4 with aclocal and run automake again.