Arch Linux build fails in autom4te/ aclocal/ autoreconf.

[dreirund]

Build of the AUR Package fails:

autoreconf: export WARNINGS=
autoreconf: Entering directory '.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
configure.ac:20: error: AC_CONFIG_MACRO_DIR can only be used once
./lib/autoconf/general.m4:1970: AC_CONFIG_MACRO_DIR is expanded from...
configure.ac:20: the top level
autom4te: error: /usr/bin/m4 failed with exit status: 1
aclocal: error: /usr/bin/autom4te failed with exit status: 1
autoreconf: error: aclocal failed with exit status: 1

Cf. comments in the AUR.