Your question sounds like you want autotools to automatically rebuild the intermediary files when ./configure detects the requisite build-depends. I'd suggest discussing this autotools feature request on the upstream lists instead of here.
>From the debian/rules side of things; there isn't yet anything better than just deleting the files before ./configure and in debian/rules clean. -- bye, pabs http://wiki.debian.org/PaulWise -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org