[Rd] DESCRIPTION Suggests entry help

From: Roebuck,Paul L <proebuck_at_mdanderson.org>
Date: Thu, 15 Dec 2011 12:53:52 -0600

How should the Suggests entry be written in this case?

Have package that supports parallel processing available for multiple R versions. Original package DESCRIPTION Suggests entry only listed 'multicore' and life was good.

Since R-2.14+ includes 'parallel' package, thought I could reference that on the Suggests entry too. But not so fast. As it doesn't exist for previous versions of R, how can I add this such that multiple R versions are supported? All older version R CMD checks fail attempting to load 'parallel'; current R CMD checks complain if I leave it out of DESCRIPTION but require('parallel') within source itself.

And although I'm pretty sure this isn't available, any syntax to imply 'either this or that' package? Or 'this package with R version'?

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