Virtual packages for shared libraries?

[Camm Maguire <camm@enhanced.com>]

Greetings!  If package A provides shared lib libfoo.so.2 in /usr/lib,
and package B provides an equivalent lib in /usr/lib/<subdir>, can
package B list 'Provides: foo' in its control, even though any
packages depending on libfoo.so.2 would only run when package B was
installed when LD_PRELOAD or LD_LIBRARY_PATH was set?

If not, what's the best way to handle this situation?

Please cc me directly.  Thanks for your work on Debian!

-- 
Camm Maguire			     			camm@enhanced.com
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah