From mathieu.ribatet at epfl.ch  Mon Oct 26 11:44:24 2009
From: mathieu.ribatet at epfl.ch (Mathieu Ribatet)
Date: Mon, 26 Oct 2009 11:44:24 +0100
Subject: [Rd] R CMD check: Error in .C
In-Reply-To: <554cd6450910251958o5925a818t313d7174754407ee@mail.gmail.com>
References: <554cd6450910251958o5925a818t313d7174754407ee@mail.gmail.com>
Message-ID: <1256553864.6689.16.camel@imapc13.epfl.ch>

Dear Etienne,

You probably want to create a zzz.R file in the /mypkg/R/ folder which
is just

        .First.lib <- function(lib, pkg){
          library.dynam("MyPkgName", package = pkg, lib.loc = lib)
          return(invisible(0))
        }

This would ensure that your shared library will be loaded.

Best,
Mathieu
        
Le lundi 26 octobre 2009 ? 03:58 +0100, Etienne Lalibert? a ?crit :
> Function/file names are hypothetical. Say I have written myfunction.R,
> which calls myfunction.c via .C("myfunction", ...).
> 
> I've compiled successfully myfunction.c via R CMD SHLIB myfunction.c
> in the terminal. Then, in the R console:
> 
> dyn.load("myfunction.so")
> source("myfunction.R")
> test <- myfunction() # works fine
> 
> So everything is in order, myfunction works perfectly.
> 
> Now I want to include myfunction() into a package called mypackage.
> Here's what I did:
> 
> 1) I've added PACKAGE = "mypackage" in the .C() line in myfunction.R.
> 2) I put myfunction.R into the R folder of mypackage
> 3) I put myfunction.c into the src folder of mypackage
> 4) I created myfunction.Rd into the man folder
> 
> I then build the package via R CMD build mypackage. All good. However,
> when I run R CMD check mypackage, I get the following error (note that
> I translated from french, might be a bit different in english):
> 
> Error in .C("myfunction", ...): C symbol name "myfunction" cannot be
> found in the DLL for package "mypackage"
> 
> I would appreciate some help here. Please do not refer my to "Writing
> R extensions" - if the answer's in there, I don't understand it.
> 
> Many thanks.
> 
> --
> Etienne Lalibert?
> ================================
> Rural Ecology Research Group
> School of Forestry
> University of Canterbury
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> 
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[Rd] R CMD check: Error in .C
Mathieu Ribatet