rpmbuild --rebuild --target i686 ...src.rpm
will work.
src rpm link below
ftp://ftp.us.postgresql.org/pub/mirrors/postgresql/binary/v8.0.2/linux/srpms/fedora/fedora-core-3/postgresql-8.0.2-1PGDG.src.rpm
---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend