'make dist' and m4 directory

[John Ling]

It seems that the m4 directory is required if I am to distribute a 
package that makes use of libtools along with automake.  Is there a way 
to include this directory during a 'make dist' without defining it in 
EXTRA_DIST in my Makefile.am?  I would have thought that automake would 
be able to include this directory and the necessary files such as 
codeset.m4 on its own.

Thanks,
John