recursive builds (revisited?)

["J. Michael Caine" <jm...@alum.rpi.edu>]

i'm new to this list.

i see a few recent messages (in the archives) on recursive builds and the
likes, but i'm still unclear.  is there any way i could _automatically_ run
(ant) build.xml or *.xml files in subdirectories of a tree?  i might expect
the task <ant> to say something like:
	antfiles	the build file(s) to use (pattern allowed)....

so that i could run a bunch of sub-projects' ant files.

what's my alternative?