[R-SIG-Mac] Error while running R CMD check

[Simon Urbanek]

Kjell,

can you, please, send us the details (in accordance to the posting  
guide)?

On Apr 1, 2008, at 12:46 PM, Kjell Konis wrote:

> I built R from source and when I run R CMD check it prints the
> following error while checking R code for possible problems.
>
> ...
> * checking R code for possible problems ... NOTE
> The process has forked and you cannot use this CoreFoundation
> functionality safely. You MUST exec().
> Break on
> __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__
> () to debug.
> <snip - same 2 lines a whole bunch of times>
> * checking Rd files ... OK
> ...
>
> The package passes R CMD check on linux. Any ideas on how I can fix  
> it?
>

Where do you get into those problems? The above error occurs on  
Leopard when a "fork"ed applications attempts to use CF calls.  
However, It's not clear to me 1) how you get a forked R and 2) how you  
get to call libraries using CF.

So far I encountered this problem only in the setup Rserve+Cairo,  
because Rserve forks R to allow multiple connections. This can be  
worked around by using more recent freetype with cairo (old FT used  
FSRef API unnecessarily which in turn calls CF). Nonetheless, if your  
package relies on both forking and CF, you have no way out - it will  
be unsupported on Mac OS X 10.5.

Cheers,
Simon