/usr/share/aclocal/ao.m4:9: warning: underquoted definition of XIPH_PATH_AO
/usr/share/aclocal/ao.m4:9:   run info '(automake)Extending aclocal'
/usr/share/aclocal/ao.m4:9:   or see http://sources.redhat.com/automake/automake.html#Extending-aclocal