Getting rid of autogenerated dirs

[Nicholas Wourms]

Hi,

During the course of a regular build, I have a program execute which 
creates a dir to store output files in.  I'd like to be able to add a 
rule to distclean, without having to manually edit Makefile.in.  I got 
the impression, from the documentation, that one could overload the 
distclean target.  So I whipped up a quick rule for distclean-local and 
did this in my Makefile.am (foo is the generated directory):

...
distclean-local:
     rm -fr foo

distclean: distclean-local
...

If this isn't the right way, does anyone have a suggestion on how I 
might do this?  I'd like to be able to have the directory removed when 
users type `make distclean`, rather then `make distclean-local`.  Thanks 
in advance!

Cheers,
Nicholas