IriX64@FthrNtr ~/brlcad-7.8.4
$ aclocal -I ./m4
/usr/share/aclocal/pstoedit.m4:7: warning: underquoted definition of AM_PATH_PST
OEDIT
  run info '(automake1.8)Extending aclocal'
  or see http://sources.redhat.com/automake/automake.html#Extending%20aclocal
/usr/share/aclocal/libsmi.m4:8: warning: underquoted definition of AM_PATH_LIBSM
I
/usr/share/aclocal/libmcrypt.m4:17: warning: underquoted definition of AM_PATH_L
IBMCRYPT
/usr/share/aclocal/cppunit.m4:4: warning: underquoted definition of AM_PATH_CPPU
NIT

IriX64@FthrNtr ~/brlcad-7.8.4
$