multiarch conversion for packages with lib32* packages

[Jay Berkenbilt <qjb@debian.org>]

Please cc me on replies as I am not presently subscribed to
debian-devel.

I would like to do multiarch conversion for the icu packages.  I
understand the concept and the implementation, and I have looked at
http://wiki.debian.org/Multiarch/Implementation.  One issue not covered
is what to do if your package already builds 32-bit libraries on a
64-bit system by building 32-bit explicitly and packaging as
lib32whatever.  The ICU source package creates lib32icu-dev and
lib32icu48 on amd64, ppc64, and kfreebsd-amd64.  Do I just stop doing
this and let packages that build depend on lib32icu-dev just stop doing
it, or is there some kind of transitional package that I should create?
Anyway it would be nice if the wiki page were explicit about this.  I
could certainly just stop doing it and let packages that have this build
dependency FTBFS until they do whatever changes they need to do, but I'm
not sure whether a precedent or convention has been established.
Thanks.

-- 
Jay Berkenbilt <qjb@debian.org>