[Rd] SystemRequirements clarification

[Kurt Hornik]

>>>>> Paul Roebuck writes:

> Did google search and checked R-ext but found very little
> on this DESCRIPTION field. Does it document runtime dependency
> only? If I have some code that can only be used with a specific
> compiler (code makes use of GCC attributes), should I add
> 	SystemRequirements: GCC
> to the package's DESCRIPTION to document the build-only
> requirement.

That's what I would do.

-k