Build-Depends-Indep and packages with architecture all

[frank@kuesterei.ch (Frank Küster)]

Hi,

for practice and because I want to use it, I am working on a package of
the CVS version of auctex, a LaTeX mode for Emacs. Since it's only an
Emacs-addon written in Lisp, it's of course architecture independent. 

In debian/rules of the "real" package from unstable, binary requires
binary-arch and binary-indep; the first does nothing and the second
builds the package.

In the original package's control file, there is a line of
Build-Depends-Indep, but no Build-Depends. Does this make sense for a
source package that has no architecture dependent binary packages at
all? Why not just use Build-Depends here and use Build-Depends-Indep
only when a source package yields both kinds of binary packages?

TIA, Frank
-- 
Frank Küster, Biozentrum der Univ. Basel
Abt. Biophysikalische Chemie