[Rd] include dll in R-package

LIYING HUANG lxh37 at psu.edu
Fri Aug 24 16:39:19 CEST 2012

Thanks for the clarification. Just wonder if I don't host the 
package on CRAN, am I able to build a package without
source codes to distribute it from my institutions homepage?
Seems not for the newer version?


----- Original Message -----
From: "Kasper Daniel Hansen" <kasperdanielhansen at gmail.com>
To: "Dirk Eddelbuettel" <edd at debian.org>
Cc: "LIYING HUANG" <lxh37 at psu.edu>, r-devel at r-project.org
Sent: Friday, August 24, 2012 10:21:18 AM
Subject: Re: [Rd] include dll in R-package

On Fri, Aug 24, 2012 at 10:16 AM, Dirk Eddelbuettel < edd at debian.org > wrote: 

On 24 August 2012 at 09:06, LIYING HUANG wrote: 
| We have several projects in the center done by researchers over years 
| in Fortran, there are copy right issues etc to prevent us from 

| giving away the source codes, but a lot of social scientist are 

| interested to use the program. We tried to use dlls to make plugins 
| (available in our website) in various statistics platforms 
| (SAS, STATA and R) to make it available to general public. 
| We used to be able to build R package using dll on version R-2.7.0, 
| , but failed to build with newer R version with the same source. 
| Any help is greatly appreciated. 
| When I try to build R package for newer version of R, I could build 
| to get "lcca_1.0.0.tar.gz", but when I "R CMD check lcca_1.0.0.tar.gz", 
| I got error message as: 
| * using log directory 'D:/project/LCCA/lcca.Rcheck' 
| * using R version 2.15.1 (2012-06-22) 
| * using platform: i386-pc-mingw32 (32-bit) 
| * using session charset: ISO8859-1 
| * checking for file 'lcca/DESCRIPTION' ... OK 
| * checking extension type ... Package 
| * this is package 'lcca' version '1.0.0' 
| * checking package namespace information ... OK 
| * checking package dependencies ... OK 
| * checking if this is a source package ... OK 
| * checking if there is a namespace ... OK 
| * checking for executable files ... WARNING 
| Found the following executable file(s): 
| libs/lcca.dll 
| Source packages should not contain undeclared executable files. 
| See section 'Package structure' in the 'Writing R Extensions' manual. 
| * checking whether package 'lcca' can be installed ... ERROR 

This tells you that in order to have a proper package, you need to include 
the very source code you want to hide. 

This is a CRAN Policy decision enforced by current R versions (but not the 
rather old version you compared against), and there is now way around it. 
You could try to construct "defunct" packages lacking the DLLs and instruct 
the users to get them from somewhere else, but that is at the same rather 
error prone (as you will lack all the built-time checks you would have with 
source code, as well as a better assurrance that compatible tools are used) 
and distasteful as CRAN is about Open Source. 

So your best bet may be to go back to the copyright holders.... 

Dirk's comments are extremely relevant if you were hoping to host the package on CRAN (which you basically won't be allowed to). You can still distribute it from your institutions homepage I think. 


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