[Rcpp-devel] R CMD check --as-cran note on Depends/Imports versus LinkingTo

[Dirk Eddelbuettel]

On 28 August 2014 at 11:10, Krueger, Fabian wrote:
| Hi,
| 
| I am working on an R package that uses Rcpp and RcppArmadillo. 
| Everything works fine on my PC, and I am now trying to make the package 
| satisfy the formal standards for submitting to CRAN. Running "R CMD 
| check --as-cran <package.name>, I get the following note: "Package in 
| Depends/Imports which should probably only be in LinkingTo: 
| 'RcppArmadillo'" [this is the only note, apart from the usual "new 
| submission" one].
| 
| Can anyone provide details on what this note means, and how to get rid 

You probably have 

    Depends: Rcpp, RcppArmadillo

or

    Imports: Rcpp, RcppArmadillo

when you only need

    Imports: Rcpp
    LinkingTo: Rcpp, RcppArmadillo

See eg the RcppMLPACK package as a recent example, and edit your DESCRIPTION
accordingly. 

| of it? What puzzles me is that producing a toy package via 
| "RcppArmadillo.package.skeleton()" yields the same note (see MWE below).

The RcppArmadillo.package.skeleton() function may need updating then with
respect to Imports -- looks like it was last touched in May. 

I'll check that over the next few days.

Dirk 

| My search led me to 
| http://article.gmane.org/gmane.comp.lang.r.rcpp/6613/match=only+linkingto, 
| as well as some release notes for Rcpp related packages that mention 
| changes in NAMESPACE related issues. However, I had trouble seeing what 
| these mean for my problem.
| 
| I am using Windows 7 (+ Rtools, of course), R version 3.1.1, 
| Rcpp_0.11.2, as well as RcppArmadillo_0.4.400.0.
| 
| Thanks & best regards,
| Fabian
| 
| MWE
| --------
| As a MWE (which I think/hope reproduces the issues that are relevant 
| here), consider the following toy example:
| 
| - Call RcppArmadillo.package.skeleton("xyz"), producing the new package 
| folder "xyz"
| - Add formally correct documentation files to folder "xyz/man" (that is, 
| add entries for all exported functions and the package itself; delete 
| between-text comments produced by skeleton function).
| - Add license information to file "xyz/DESCRIPTION": "License: GPL (>= 2)"
| 
| Running "R CMD check xyz" goes through without any notes or warnings. 
| Running "R CMD check --as-cran xyz" yields the exact same note as above 
| (plus the "new submission" note), but no other notes/warnings. [I did 
| not post the fake docu files for package "xyz" to avoid spamming - if 
| anyone wants them, pls let me know]
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