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

[Prof Brian Ripley]

Just as another data point, I have seen this when running R under gdb 
debugging the quartz() device.  But that did not surprise me (gdb forks on 
the systems I know about), and it worked enough to identify the bug.

On Tue, 1 Apr 2008, Simon Urbanek wrote:

> 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
>
> _______________________________________________
> R-SIG-Mac mailing list
> R-SIG-Mac at stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595